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Dr. ERIC R SWITZER

Photo of ERIC SWITZER

Dr. ERIC R SWITZER

  • RSCH AST, STLR GALCTIC&XTRGLTC ASTR
  • 301.614.5174
  • NASA/GSFC
  • Mail Code: 665
  • Greenbelt , MD 20771
  • Employer: NASA

    • Brief Bio

    Dr. Eric Switzer is an Astrophysicist in the Observational Cosmology Laboratory at the Goddard Space Flight Center (GSFC) in Greenbelt, Maryland. His research relates observations of diffuse cosmic background radiation to models of our universe at large. Before joining GSFC, Eric was a senior research associate at the Canadian Institute for Theoretical Astrophysics (CITA) and a Kavli Fellow at the Kavli Institute for Cosmological Physics (KICP).

    https://github.com/eric-switzer/cv_switzer/raw/master/cv_switzer_online.pdf

    Research Interests

    EXCLAIM and Intensity mapping

    The light emitted by atomic transitions in the distant universe will be redshifted by the time it reaches us today. By measuring the spectrum over a region of the sky, a survey can infer the three-dimensional distribution of emission from galaxies in a large volume of the universe.

    The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a cryogenic balloon-borne instrument to survey galaxy and star formation history over cosmological time scales. Rather than identifying individual objects, EXCLAIM will be a pathfinder to demonstrate an intensity mapping approach. EXCLAIM will operate at 420-540 GHz with a spectral resolution R=512 to measure the integrated CO and [CII] in redshift windows spanning 0 < z < 3.5. CO and [CII] line emissions are valuable tracers of the gas phases in the interstellar medium involved in star-formation processes. Thus, EXCLAIM will shed light on why the star formation rate declines at z < 2, despite continued clustering of the dark matter. The instrument will employ an array of six superconducting integrated grating-analog spectrometers (micro-spec) coupled to microwave kinetic inductance detectors (MKIDs).

    Through a previous collaboration at CITA, Eric analyzed the statistical distribution of matter when the universe was half its present size, using the 21 cm transition of neutral hydrogen and data acquired with the Green Bank Telescope. 

    CMB Polarization on large angular scales -- PIPER

    PIPER is a balloon-borne telescope designed to search for a particular polarization signature in the cosmic microwave background (CMB) which is thought to originate uniquely from processes in the very early universe, at energy scales that will be too high to probe in a terrestrial laboratory. PIPER will map most of the sky in millimeter-wavelengths using cryogenic Transition Edge Sensors and a novel polarization modulation scheme. It avoids warm windows by using the ARCADE bucket dewar, where optics are kept cold and dry through liquid and gaseous helium. It will fly for only around one day and repeat flights from northern- and southern-hemisphere sites at several frequencies.

    High-resolution measurements of CMB intensity and polarization

    High-resolution measurements of the CMB intensity have achieved great precision through the Planck Satellite, the Atacama Cosmology Telescope (ACT), and the South Pole Telescope (SPT). In addition to supporting a standard cosmological model of the universe dominated by dark energy and matter, these experiments have measured the gravitational lensing of the CMB by intervening matter and the perturbations to the CMB spectrum from the most massive clusters of galaxies in the universe. They have also provided an independent check on the number of neutrino species and helium abundance in the early universe. Eric was part of the team that developed ACT and its successor ACTPol.

    Atoms in the cosmos

    The early universe was a hot, ionized, and highly uniform gas. As it cooled through expansion, the gas could become neutral and transparent, liberating the thermal photons that are observed today as the cosmic microwave background (CMB). A detailed understanding of this cosmological recombination is required to interpret precise CMB anisotropy measurements of WMAP/Planck/ACT/SPT. Eric refined the calculation of helium recombination and was part of the community that brought the previous generation of analyses to a higher level of precision for modern CMB experiments. Following recombination, the first luminous objects are fueled by gas and reionize the universe -- atoms provide a diagnostic of this rich evolution up to the present.

    Current Projects

    PI - The Experiment for Cryogenic Large-aperture Intensity Mapping (EXCLAIM)

    Deputy PI - The Primordial Inflation Polarization Explorer (PIPER)

    Science Lead - Legacy Archive for Microwave Background Data Analysis (LAMBDA)

    Positions/Employment

    8/2013 - Present

    Astrophysicist

    Goddard Space Flight Center, Greenbelt, Maryland
    9/2011 - 8/2013

    Senior Research Associate

    Canadian Institute for Theoretical Astrophysics (CITA), Toronto, Ontario  
    10/2008 - 9/2011

    Kavli Fellow

    Kavli Institute for Cosmological Physics (KICP), Chicago, Illinois  

    Education

    • Ph.D., physics -- Princeton University (2008) under Lyman Page and Chris Hirata
    • B.A., physics with specialization in astrophysics -- University of Chicago (2003)

    Selected Publications

    Refereed

    Oxholm, T. M., and E. R. Switzer. 2021. "Intensity mapping without cosmic variance." Physical Review D, 104 (8): 083501 [10.1103/physrevd.104.083501]

    Kogut, A., T. Essinger-Hileman, E. Switzer, et al. E. Wollack, D. Fixsen, L. Lowe, and P. Mirel. 2021. "Superfluid liquid helium control for the primordial inflation polarization explorer balloon payload." Review of Scientific Instruments, 92 (6): 064501 [10.1063/5.0048800]

    Datta, R., D. T. Chuss, J. Eimer, et al. T. Essinger-Hileman, N. N. Gandilo, K. Helson, A. J. Kogut, L. Lowe, P. Mirel, K. Rostem, M. Sagliocca, D. Sponseller, E. R. Switzer, P. A. Taraschi, and E. J. Wollack. 2021. "Anti-reflection coated vacuum window for the Primordial Inflation Polarization ExploreR (PIPER) balloon-borne instrument." Review of Scientific Instruments, 92 (3): 035111 [10.1063/5.0029430]

    Switzer, E., P. Ade, C. Anderson, et al. E. Barrentine, N. Bellis, A. Bolatto, P. Breysse, B. Bulcha, G. Cataldo, J. Connors, P. Cursey, N. Ehsan, H. Grant, T. Essinger-Hileman, L. Hess, M. Kimball, A. Kogut, A. Lamb, L. Lowe, P. Mauskopf, J. McMahon, M. Mirzaei, S. Moseley, J. Mugge-Durum, O. Noroozian, U. Pen, A. Pullen, S. Rodriguez, P. Shirron, R. Somerville, T. Stevenson, C. Tucker, E. Visbal, C. Volpert, E. Wollack, and S. Yang. 2019. "The Experiment for Cryogenic Large-aperture Intensity Mapping (EXCLAIM)." JLTP, arXiv:1912.07118. (Accepted)

    Yang, S., A. R. Pullen, and E. R. Switzer. 2019. "Evidence for C II diffuse line emission at redshift z ̃ 2.6." Monthly Notices of the Royal Astronomical Society, 489 (1): L53-L57 [10.1093/mnrasl/slz126]

    Switzer, E. R., P. Ade, T. Baildon, et al. D. Benford, C. Bennett, D. Chuss, R. Datta, J. Eimer, D. Fixsen, N. Gandilo, T. Essinger-Hileman, M. Halpern, G. Hilton, K. Irwin, C. Jhabvala, M. Kimball, A. Kogut, J. Lazear, L. Lowe, J. McMahon, T. Miller, P. Mirel, S. Moseley, S. Pawlyk, S. Rodriguez, E. Sharp, P. Shirron, J. Staguhn, D. Sullivan, P. Taraschi, C. Tucker, A. Walts, E. Wollack, and E. R. Switzer. 2019. "Sub-Kelvin cooling for two kilopixel bolometer arrays in the PIPER receiver." Review of Scientific Instruments, 90 (9): 095104 [10.1063/1.5108649]

    Datta, R., S. Aiola, S. K. Choi, et al. M. Devlin, J. Dunkley, D. , P. A. Gallardo, M. Gralla, M. Halpern, M. Hasselfield, M. Hilton, A. D. Hincks, S.-P. P. Ho, J. Hubmayr, K. M. Huffenberger, J. P. Hughes, A. Kosowsky, C. H. L'opez-Caraballo, T. Louis, M. Lungu, T. Marriage, L. Maurin, J. McMahon, K. Moodley, S. K. Naess, F. Nati, M. D. Niemack, L. A. Page, B. Partridge, H. Prince, S. T. Staggs, E. R. Switzer, E. J. Wollack, and G. Farren. 2019. "The Atacama Cosmology Telescope: two-season ACTPol extragalactic point sources and their polarization properties." Monthly Notices of the Royal Astronomical Society, 486 (4): 5239-5262 [10.1093/mnras/sty2934]

    Switzer, E. R., C. Anderson, A. Pullen, and S. Yang. 2019. "Intensity Mapping in the Presence of Foregrounds and Correlated Continuum Emission." The Astrophysical Journal, 872 (1): 82 [10.3847/1538-4357/aaf9ab]

    Anderson, C., N. Luciw, Y.-C. Li, et al. C. Kuo, J. Yadav, K. Masui, T.-C. Chang, X. Chen, N. Oppermann, Y.-W. Liao, U.-L. Pen, D. Price, L. Staveley-Smith, E. Switzer, P. Timbie, and L. Wolz. 2018. "Low-amplitude clustering in low-redshift 21-cm intensity maps cross-correlated with 2dF galaxy densities." Monthly Notices of the Royal Astronomical Society, 476 (3): 3382-3392 (Accepted) [10.1093/mnras/sty346]

    Switzer, E. R. 2017. "Tracing the Cosmological Evolution of Stars and Cold Gas with CMB Spectral Surveys." The Astrophysical Journal, 838 (2): 82 [10.3847/1538-4357/aa6576]

    Switzer, E., T.-C. Chang, K. Masui, U.-L. Pen, and T. Voytek. 2015. "Interpreting the Unresolved Intensity of Cosmologically Redshifted Line Radiation." The Astrophysical Journal, 815: 51 [10.1088/0004-637X/815/1/51]

    Switzer, E. R., and A. Liu. 2014. "Erasing the Variable: Empirical Foreground Discovery for Global 21 cm Spectrum Experiments." The Astrophysical Journal, 793 (2): 102.

    Masui, K. W., E. R. Switzer, N. Banavar, et al. K. Bandura, C. Blake, L. M. Calin, T. C. Chang, X. Chen, Y. C. Li, Y. W. Liao, A. Natarajan, U. L. Pen, J. B. Peterson, J. R. Shaw, and T. C. Voytek. 2013. "Measurement of 21 cm Brightness Fluctuations at z ~ 0.8 in Cross-correlation." ApJL, 763: L20.

    Switzer, E. R., K. W. Masui, K. Bandura, et al. L. M. Calin, T. C. Chang, X. L. Chen, Y. C. Li, Y. W. Liao, A. Natarajan, U. L. Pen, J. B. Peterson, J. R. Shaw, and T. C. Voytek. 2013. "Determination of z ~ 0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping autocorrelation." MNRASL, 434: L46.

    Dunner, R., M. Hasselfield, T. A. Marriage, et al. J. Sievers, V. Acquaviva, G. E. Addison, P. Ade, P. Aguirre, M. Amiri, J. W. Appel, L. F. Barrientos, E. S. Battistelli, J. R. Bond, B. Brown, B. Burger, E. Calabrese, J. Chervenak, S. Das, M. J. Devlin, S. R. Dicker, W. Bertrand Doriese, J. Dunkley, T. Essinger-Hileman, R. P. Fisher, M. B. Gralla, J. W. Fowler, A. Hajian, M. Halpern, C. Hernandez-Monteagudo, G. C. Hilton, M. Hilton, A. D. Hincks, R. Hlozek, K. M. Huffenberger, D. H. Hughes, J. P. Hughes, L. Infante, K. D. Irwin, J. Baptiste Juin, M. Kaul, J. Klein, A. Kosowsky, J. M. Lau, M. Limon, Y. Lin, T. Louis, R. H. Lupton, D. Marsden, K. Martocci, P. Mauskopf, F. Menanteau, K. Moodley, H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, B. Partridge, H. Quintana, B. Reid, N. Sehgal, B. D. Sherwin, D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R. Thornton, H. Trac, C. Tucker, R. Warne, G. Wilson, E. Wollack, and Y. Zhao. 2013. "The Atacama Cosmology Telescope: Data Characterization and Mapmaking." ApJ, 762: 10.

    Dunkley, J., R. Hlozek, J. Sievers, et al. V. Acquaviva, P. Ade, P. Aguirre, M. Amiri, J. W. Appel, L. F. Barrientos, E. S. Battistelli, J. R. Bond, B. Brown, B. Burger, J. Chervenak, S. Das, M. J. Devlin, S. R. Dicker, W. Bertrand Doriese, R. Dunner, T. Essinger-Hileman, R. P. Fisher, J. W. Fowler, A. Hajian, M. Halpern, M. Hasselfield, C. Hernandez-Monteagudo, G. C. Hilton, M. Hilton, A. D. Hincks, K. M. Huffenberger, D. H. Hughes, J. P. Hughes, L. Infante, K. D. Irwin, J. B. Juin, M. Kaul, J. Klein, A. Kosowsky, J. M. Lau, M. Limon, Y. T. Lin, R. H. Lupton, T. A. Marriage, D. Marsden, P. Mauskopf, F. Menanteau, K. Moodley, H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, B. Partridge, B. Reid, N. Sehgal, B. Sherwin, D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R. Thornton, H. Trac, C. Tucker, R. Warne, E. Wollack, and Y. Zhao. 2011. "The Atacama Cosmology Telescope: Cosmological Parameters from the 2008 Power Spectrum." ApJ, 739: 52.

    Sherwin, B. D., J. Dunkley, S. Das, et al. J. W. Appel, J. R. Bond, C. S. Carvalho, M. J. Devlin, R. Dunner, T. Essinger-Hileman, J. W. Fowler, A. Hajian, M. Halpern, M. Hasselfield, A. D. Hincks, R. Hlozek, J. P. Hughes, K. D. Irwin, J. Klein, A. Kosowsky, T. A. Marriage, D. Marsden, K. Moodley, F. Menanteau, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, E. D. Reese, B. L. Schmitt, N. Sehgal, J. Sievers, D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R. Thornton, K. Visnjic, and E. Wollack. 2011. "Evidence for Dark Energy from the Cosmic Microwave Background Alone Using the Atacama Cosmology Telescope Lensing Measurements." PRL, 107: 21302.

    Swetz, D. S., P. Ade, M. Amiri, et al. J. W. Appel, E. S. Battistelli, B. Burger, J. Chervenak, M. J. Devlin, S. R. Dicker, W. B. Doriese, R. Dunner, T. Essinger-Hileman, R. P. Fisher, J. W. Fowler, M. Halpern, M. Hasselfield, G. C. Hilton, A. D. Hincks, K. D. Irwin, N. Jarosik, M. Kaul, J. Klein, J. M. Lau, M. Limon, T. A. Marriage, D. Marsden, K. Martocci, P. Mauskopf, H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, S. T. Staggs, O. Stryzak, E. R. Switzer, R. Thornton, C. Tucker, E. Wollack, and Y. Zhao. 2011. "Overview of the Atacama Cosmology Telescope: Receiver, Instrumentation, and Telescope Systems." ApJS, 194: 41.

    Abbot, D. S., and E. R. Switzer. 2011. "The Steppenwolf: A Proposal for a Habitable Planet in Interstellar Space." ApJL, 735: L27.

    Vieira, J. D., T. M. Crawford, E. R. Switzer, et al. P. Ade, K. A. Aird, M. Ashby, B. A. Benson, L. E. Bleem, M. Brodwin, J. E. Carlstrom, C. L. Chang, H. M. Cho, A. T. Crites, T. de Haan, M. A. Dobbs, W. Everett, E. M. George, M. Gladders, N. R. Hall, N. W. Halverson, F. W. High, G. P. Holder, W. L. Holzapfel, J. D. Hrubes, M. Joy, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, M. Lueker, D. P. Marrone, V. McIntyre, J. J. McMahon, J. Mehl, S. S. Meyer, J. J. Mohr, T. E. Montroy, S. Padin, T. Plagge, C. Pryke, C. L. Reichardt, J. E. Ruhl, K. K. Schaffer, L. Shaw, E. Shirokoff, H. G. Spieler, B. Stalder, Z. Staniszewski, A. A. Stark, K. Vanderlinde, W. Walsh, R. Williamson, Y. Yang, O. Zahn, and A. Zenteno. 2010. "Extragalactic Millimeter-wave Sources in South Pole Telescope Survey Data: Source Counts, Catalog, and Statistics for an 87 Square-degree Field." ApJ, 719: 763.

    Crawford, T. M., E. R. Switzer, W. L. Holzapfel, et al. C. L. Reichardt, D. P. Marrone, and J. D. Vieira. 2010. "A Method for Individual Source Brightness Estimation in Single- and Multi-band Data." ApJ, 718: 513.

    McQuinn, M., and E. R. Switzer. 2009. "Redshifted intergalactic He+3 8.7 GHz hyperfine absorption." PRD, 80: 63010.

    Switzer, E. R., C. Allen, M. Amiri, et al. J. W. Appel, E. S. Battistelli, B. Burger, J. A. Chervenak, A. J. Dahlen, S. Das, M. J. Devlin, S. R. Dicker, W. B. Doriese, R. Dunner, T. Essinger-Hileman, X. Gao, M. Halpern, M. Hasselfield, G. C. Hilton, A. D. Hincks, K. D. Irwin, S. Knotek, R. P. Fisher, J. W. Fowler, N. Jarosik, M. Kaul, J. Klein, J. M. Lau, M. Limon, R. H. Lupton, T. A. Marriage, K. L. Martocci, S. H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. Page, L. P. Parker, B. A. Reid, C. D. Reintsema, A. J. Sederberg, J. L. Sievers, D. N. Spergel, S. T. Staggs, O. R. Stryzak, D. S. Swetz, R. J. Thornton, E. J. Wollack, and Y. Zhao. 2008. "Systems and control software for the Atacama Cosmology Telescope." Proc. SPIE, 7019: 85.

    Hirata, C. M., and E. R. Switzer. 2008. "Primordial helium recombination. II. Two-photon processes." PRD, 77: 83007.

    Switzer, E. R., and C. M. Hirata. 2008. "Primordial helium recombination. I. Feedback, line transfer, and continuum opacity." PRD, 77: 83006.

    Switzer, E. R., and C. M. Hirata. 2008. "Primordial helium recombination. III. Thomson scattering, isotope shifts, and cumulative results." PRD, 77: 83008.

    Niemack, M. D., Y. Zhao, E. Wollack, et al. R. Thornton, E. R. Switzer, D. S. Swetz, S. T. Staggs, L. Page, O. Stryzak, H. Moseley, T. A. Marriage, M. Limon, J. M. Lau, J. Klein, M. Kaul, N. Jarosik, K. D. Irwin, A. D. Hincks, G. C. Hilton, M. Halpern, J. W. Fowler, R. P. Fisher, R. Dünner, W. B. Doriese, S. R. Dicker, M. J. Devlin, J. Chervenak, B. Burger, E. S. Battistelli, J. Appel, M. Amiri, C. Allen, and A. M. Aboobaker. 2008. "A Kilopixel Array of TES Bolometers for ACT: Development, Testing, and First Light." Journal of Low Temperature Physics, 151: 690 [Full Text (Link)] [10.1007/s10909-008-9729-2]

    Switzer, E. R., and C. M. Hirata. 2005. "Ionizing radiation from hydrogen recombination strongly suppresses the lithium scattering signature in the CMB." PRD, 72: 83002.

    Abazajian, K., E. R. Switzer, S. Dodelson, K. Heitmann, and S. Habib. 2005. "Nonlinear cosmological matter power spectrum with massive neutrinos: The halo model." PRD, 71: 43507.

    Non-Refereed

    Mirzaei, M., E. M. Barrentine, B. T. Bulcha, et al. G. Cataldo, J. A. Connors, N. Ehsan, T. M. Essinger-Hileman, L. A. Hess, J. W. Mugge-Durum, O. Noroozian, T. M. Oxholm, T. R. Stevenson, E. R. Switzer, C. G. Volpert, and E. J. Wollack. 2020. "µ-spec spectrometers for the EXCLAIM instrument." Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X [10.1117/12.2562446]

    Cataldo, G., P. A. Ade, C. J. Anderson, et al. A. Barlis, E. M. Barrentine, N. G. Bellis, A. D. Bolatto, P. C. Breysse, B. T. Bulcha, J. A. Connors, P. W. Cursey, N. Ehsan, T. M. Essinger-Hileman, J. Glenn, J. Golec, J. Hays-Wehle, L. A. Hess, A. Jahromi, M. O. Kimball, A. J. Kogut, L. N. Lowe, P. D. Mauskopf, J. J. McMahon, M. Mirzaei, S. H. Moseley, J. W. Mugge-Durum, O. Noroozian, T. M. Oxholm, U.-L. Pen, A. R. Pullen, S. Rodriguez, P. J. Shirron, G. Siebert, A. K. Sinclair, R. S. Somerville, R. Stephenson, T. R. Stevenson, E. R. Switzer, P. T. Timbie, C. E. Tucker, E. Visbal, C. G. Volpert, E. J. Wollack, and S. Yang. 2020. "Overview and status of EXCLAIM, the experiment for cryogenic large-aperture intensity mapping." Ground-based and Airborne Telescopes VIII [10.1117/12.2561069]

    Essinger-Hileman, T. M., T. M. Oxholm, G. L. Siebert, et al. P. A. Ade, C. J. Anderson, A. Barlis, E. M. Barrentine, J. Beeman, N. G. Bellis, P. C. Breysse, A. D. Bolatto, B. T. Bulcha, G. Cataldo, J. A. Connors, P. W. Cursey, N. Ehsan, L.-R. Fernandez, J. Glenn, J. E. Golec, J. Hays-Wehle, L. Hess, A. E. Jahromi, M. O. Kimball, A. Kogut, L. N. Lowe, P. Mauskopf, J. McMahon, M. Mirzaei, H. Moseley, J. Mugge-Durum, O. Noroozian, U.-L. Pen, A. R. Pullen, S. Rodriguez, K. Shire, A. Sinclair, R. S. Somerville, T. R. Stevenson, E. R. Switzer, P. Timbie, C. Tucker, E. Visbal, C. G. Volpert, E. J. Wollack, and S. Yang. 2020. "Optical Design of the Experiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)." Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X [10.1117/12.2576254]

    Brief Bio

    Dr. Eric Switzer is an Astrophysicist in the Observational Cosmology Laboratory at the Goddard Space Flight Center (GSFC) in Greenbelt, Maryland. His research relates observations of diffuse cosmic background radiation to models of our universe at large. Before joining GSFC, Eric was a senior research associate at the Canadian Institute for Theoretical Astrophysics (CITA) and a Kavli Fellow at the Kavli Institute for Cosmological Physics (KICP).

    https://github.com/eric-switzer/cv_switzer/raw/master/cv_switzer_online.pdf

    Selected Publications

    Refereed

    Oxholm, T. M., and E. R. Switzer. 2021. "Intensity mapping without cosmic variance." Physical Review D 104 (8): 083501 [10.1103/physrevd.104.083501]

    Kogut, A., T. Essinger-Hileman, E. Switzer, et al. E. Wollack, D. Fixsen, L. Lowe, and P. Mirel. 2021. "Superfluid liquid helium control for the primordial inflation polarization explorer balloon payload." Review of Scientific Instruments 92 (6): 064501 [10.1063/5.0048800]

    Datta, R., D. T. Chuss, J. Eimer, et al. T. Essinger-Hileman, N. N. Gandilo, K. Helson, A. J. Kogut, L. Lowe, P. Mirel, K. Rostem, M. Sagliocca, D. Sponseller, E. R. Switzer, P. A. Taraschi, and E. J. Wollack. 2021. "Anti-reflection coated vacuum window for the Primordial Inflation Polarization ExploreR (PIPER) balloon-borne instrument." Review of Scientific Instruments 92 (3): 035111 [10.1063/5.0029430]

    Switzer, E., P. Ade, C. Anderson, et al. E. Barrentine, N. Bellis, A. Bolatto, P. Breysse, B. Bulcha, G. Cataldo, J. Connors, P. Cursey, N. Ehsan, H. Grant, T. Essinger-Hileman, L. Hess, M. Kimball, A. Kogut, A. Lamb, L. Lowe, P. Mauskopf, J. McMahon, M. Mirzaei, S. Moseley, J. Mugge-Durum, O. Noroozian, U. Pen, A. Pullen, S. Rodriguez, P. Shirron, R. Somerville, T. Stevenson, C. Tucker, E. Visbal, C. Volpert, E. Wollack, and S. Yang. 2019. "The Experiment for Cryogenic Large-aperture Intensity Mapping (EXCLAIM)." JLTP (Accepted) arXiv:1912.07118

    Yang, S., A. R. Pullen, and E. R. Switzer. 2019. "Evidence for C II diffuse line emission at redshift z ̃ 2.6." Monthly Notices of the Royal Astronomical Society 489 (1): L53-L57 [10.1093/mnrasl/slz126]

    Switzer, E. R., P. Ade, T. Baildon, et al. D. Benford, C. Bennett, D. Chuss, R. Datta, J. Eimer, D. Fixsen, N. Gandilo, T. Essinger-Hileman, M. Halpern, G. Hilton, K. Irwin, C. Jhabvala, M. Kimball, A. Kogut, J. Lazear, L. Lowe, J. McMahon, T. Miller, P. Mirel, S. Moseley, S. Pawlyk, S. Rodriguez, E. Sharp, P. Shirron, J. Staguhn, D. Sullivan, P. Taraschi, C. Tucker, A. Walts, E. Wollack, and E. R. Switzer. 2019. "Sub-Kelvin cooling for two kilopixel bolometer arrays in the PIPER receiver." Review of Scientific Instruments 90 (9): 095104 [10.1063/1.5108649]

    Datta, R., S. Aiola, S. K. Choi, et al. M. Devlin, J. Dunkley, D. , P. A. Gallardo, M. Gralla, M. Halpern, M. Hasselfield, M. Hilton, A. D. Hincks, S.-P. P. Ho, J. Hubmayr, K. M. Huffenberger, J. P. Hughes, A. Kosowsky, C. H. L'opez-Caraballo, T. Louis, M. Lungu, T. Marriage, L. Maurin, J. McMahon, K. Moodley, S. K. Naess, F. Nati, M. D. Niemack, L. A. Page, B. Partridge, H. Prince, S. T. Staggs, E. R. Switzer, E. J. Wollack, and G. Farren. 2019. "The Atacama Cosmology Telescope: two-season ACTPol extragalactic point sources and their polarization properties." Monthly Notices of the Royal Astronomical Society 486 (4): 5239-5262 [10.1093/mnras/sty2934]

    Switzer, E. R., C. Anderson, A. Pullen, and S. Yang. 2019. "Intensity Mapping in the Presence of Foregrounds and Correlated Continuum Emission." The Astrophysical Journal 872 (1): 82 [10.3847/1538-4357/aaf9ab]

    Anderson, C., N. Luciw, Y.-C. Li, et al. C. Kuo, J. Yadav, K. Masui, T.-C. Chang, X. Chen, N. Oppermann, Y.-W. Liao, U.-L. Pen, D. Price, L. Staveley-Smith, E. Switzer, P. Timbie, and L. Wolz. 2018. "Low-amplitude clustering in low-redshift 21-cm intensity maps cross-correlated with 2dF galaxy densities." Monthly Notices of the Royal Astronomical Society (Accepted) 476 (3): 3382-3392 [10.1093/mnras/sty346]

    Switzer, E. R. 2017. "Tracing the Cosmological Evolution of Stars and Cold Gas with CMB Spectral Surveys." The Astrophysical Journal 838 (2): 82 [10.3847/1538-4357/aa6576]

    Switzer, E., T.-C. Chang, K. Masui, U.-L. Pen, and T. Voytek. 2015. "Interpreting the Unresolved Intensity of Cosmologically Redshifted Line Radiation." The Astrophysical Journal 815 51 [10.1088/0004-637X/815/1/51]

    Switzer, E. R., and A. Liu. 2014. "Erasing the Variable: Empirical Foreground Discovery for Global 21 cm Spectrum Experiments." The Astrophysical Journal 793 (2): 102

    Masui, K. W., E. R. Switzer, N. Banavar, et al. K. Bandura, C. Blake, L. M. Calin, T. C. Chang, X. Chen, Y. C. Li, Y. W. Liao, A. Natarajan, U. L. Pen, J. B. Peterson, J. R. Shaw, and T. C. Voytek. 2013. "Measurement of 21 cm Brightness Fluctuations at z ~ 0.8 in Cross-correlation." ApJL 763 L20

    Switzer, E. R., K. W. Masui, K. Bandura, et al. L. M. Calin, T. C. Chang, X. L. Chen, Y. C. Li, Y. W. Liao, A. Natarajan, U. L. Pen, J. B. Peterson, J. R. Shaw, and T. C. Voytek. 2013. "Determination of z ~ 0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping autocorrelation." MNRASL 434 L46

    Dunner, R., M. Hasselfield, T. A. Marriage, et al. J. Sievers, V. Acquaviva, G. E. Addison, P. Ade, P. Aguirre, M. Amiri, J. W. Appel, L. F. Barrientos, E. S. Battistelli, J. R. Bond, B. Brown, B. Burger, E. Calabrese, J. Chervenak, S. Das, M. J. Devlin, S. R. Dicker, W. Bertrand Doriese, J. Dunkley, T. Essinger-Hileman, R. P. Fisher, M. B. Gralla, J. W. Fowler, A. Hajian, M. Halpern, C. Hernandez-Monteagudo, G. C. Hilton, M. Hilton, A. D. Hincks, R. Hlozek, K. M. Huffenberger, D. H. Hughes, J. P. Hughes, L. Infante, K. D. Irwin, J. Baptiste Juin, M. Kaul, J. Klein, A. Kosowsky, J. M. Lau, M. Limon, Y. Lin, T. Louis, R. H. Lupton, D. Marsden, K. Martocci, P. Mauskopf, F. Menanteau, K. Moodley, H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, B. Partridge, H. Quintana, B. Reid, N. Sehgal, B. D. Sherwin, D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R. Thornton, H. Trac, C. Tucker, R. Warne, G. Wilson, E. Wollack, and Y. Zhao. 2013. "The Atacama Cosmology Telescope: Data Characterization and Mapmaking." ApJ 762 10

    Dunkley, J., R. Hlozek, J. Sievers, et al. V. Acquaviva, P. Ade, P. Aguirre, M. Amiri, J. W. Appel, L. F. Barrientos, E. S. Battistelli, J. R. Bond, B. Brown, B. Burger, J. Chervenak, S. Das, M. J. Devlin, S. R. Dicker, W. Bertrand Doriese, R. Dunner, T. Essinger-Hileman, R. P. Fisher, J. W. Fowler, A. Hajian, M. Halpern, M. Hasselfield, C. Hernandez-Monteagudo, G. C. Hilton, M. Hilton, A. D. Hincks, K. M. Huffenberger, D. H. Hughes, J. P. Hughes, L. Infante, K. D. Irwin, J. B. Juin, M. Kaul, J. Klein, A. Kosowsky, J. M. Lau, M. Limon, Y. T. Lin, R. H. Lupton, T. A. Marriage, D. Marsden, P. Mauskopf, F. Menanteau, K. Moodley, H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, B. Partridge, B. Reid, N. Sehgal, B. Sherwin, D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R. Thornton, H. Trac, C. Tucker, R. Warne, E. Wollack, and Y. Zhao. 2011. "The Atacama Cosmology Telescope: Cosmological Parameters from the 2008 Power Spectrum." ApJ 739 52

    Sherwin, B. D., J. Dunkley, S. Das, et al. J. W. Appel, J. R. Bond, C. S. Carvalho, M. J. Devlin, R. Dunner, T. Essinger-Hileman, J. W. Fowler, A. Hajian, M. Halpern, M. Hasselfield, A. D. Hincks, R. Hlozek, J. P. Hughes, K. D. Irwin, J. Klein, A. Kosowsky, T. A. Marriage, D. Marsden, K. Moodley, F. Menanteau, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, E. D. Reese, B. L. Schmitt, N. Sehgal, J. Sievers, D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R. Thornton, K. Visnjic, and E. Wollack. 2011. "Evidence for Dark Energy from the Cosmic Microwave Background Alone Using the Atacama Cosmology Telescope Lensing Measurements." PRL 107 21302

    Swetz, D. S., P. Ade, M. Amiri, et al. J. W. Appel, E. S. Battistelli, B. Burger, J. Chervenak, M. J. Devlin, S. R. Dicker, W. B. Doriese, R. Dunner, T. Essinger-Hileman, R. P. Fisher, J. W. Fowler, M. Halpern, M. Hasselfield, G. C. Hilton, A. D. Hincks, K. D. Irwin, N. Jarosik, M. Kaul, J. Klein, J. M. Lau, M. Limon, T. A. Marriage, D. Marsden, K. Martocci, P. Mauskopf, H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. A. Page, L. Parker, S. T. Staggs, O. Stryzak, E. R. Switzer, R. Thornton, C. Tucker, E. Wollack, and Y. Zhao. 2011. "Overview of the Atacama Cosmology Telescope: Receiver, Instrumentation, and Telescope Systems." ApJS 194 41

    Abbot, D. S., and E. R. Switzer. 2011. "The Steppenwolf: A Proposal for a Habitable Planet in Interstellar Space." ApJL 735 L27

    Vieira, J. D., T. M. Crawford, E. R. Switzer, et al. P. Ade, K. A. Aird, M. Ashby, B. A. Benson, L. E. Bleem, M. Brodwin, J. E. Carlstrom, C. L. Chang, H. M. Cho, A. T. Crites, T. de Haan, M. A. Dobbs, W. Everett, E. M. George, M. Gladders, N. R. Hall, N. W. Halverson, F. W. High, G. P. Holder, W. L. Holzapfel, J. D. Hrubes, M. Joy, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, M. Lueker, D. P. Marrone, V. McIntyre, J. J. McMahon, J. Mehl, S. S. Meyer, J. J. Mohr, T. E. Montroy, S. Padin, T. Plagge, C. Pryke, C. L. Reichardt, J. E. Ruhl, K. K. Schaffer, L. Shaw, E. Shirokoff, H. G. Spieler, B. Stalder, Z. Staniszewski, A. A. Stark, K. Vanderlinde, W. Walsh, R. Williamson, Y. Yang, O. Zahn, and A. Zenteno. 2010. "Extragalactic Millimeter-wave Sources in South Pole Telescope Survey Data: Source Counts, Catalog, and Statistics for an 87 Square-degree Field." ApJ 719 763

    Crawford, T. M., E. R. Switzer, W. L. Holzapfel, et al. C. L. Reichardt, D. P. Marrone, and J. D. Vieira. 2010. "A Method for Individual Source Brightness Estimation in Single- and Multi-band Data." ApJ 718 513

    McQuinn, M., and E. R. Switzer. 2009. "Redshifted intergalactic He+3 8.7 GHz hyperfine absorption." PRD 80 63010

    Switzer, E. R., C. Allen, M. Amiri, et al. J. W. Appel, E. S. Battistelli, B. Burger, J. A. Chervenak, A. J. Dahlen, S. Das, M. J. Devlin, S. R. Dicker, W. B. Doriese, R. Dunner, T. Essinger-Hileman, X. Gao, M. Halpern, M. Hasselfield, G. C. Hilton, A. D. Hincks, K. D. Irwin, S. Knotek, R. P. Fisher, J. W. Fowler, N. Jarosik, M. Kaul, J. Klein, J. M. Lau, M. Limon, R. H. Lupton, T. A. Marriage, K. L. Martocci, S. H. Moseley, C. B. Netterfield, M. D. Niemack, M. R. Nolta, L. Page, L. P. Parker, B. A. Reid, C. D. Reintsema, A. J. Sederberg, J. L. Sievers, D. N. Spergel, S. T. Staggs, O. R. Stryzak, D. S. Swetz, R. J. Thornton, E. J. Wollack, and Y. Zhao. 2008. "Systems and control software for the Atacama Cosmology Telescope." Proc. SPIE 7019 85

    Hirata, C. M., and E. R. Switzer. 2008. "Primordial helium recombination. II. Two-photon processes." PRD 77 83007

    Switzer, E. R., and C. M. Hirata. 2008. "Primordial helium recombination. I. Feedback, line transfer, and continuum opacity." PRD 77 83006

    Switzer, E. R., and C. M. Hirata. 2008. "Primordial helium recombination. III. Thomson scattering, isotope shifts, and cumulative results." PRD 77 83008

    Niemack, M. D., Y. Zhao, E. Wollack, et al. R. Thornton, E. R. Switzer, D. S. Swetz, S. T. Staggs, L. Page, O. Stryzak, H. Moseley, T. A. Marriage, M. Limon, J. M. Lau, J. Klein, M. Kaul, N. Jarosik, K. D. Irwin, A. D. Hincks, G. C. Hilton, M. Halpern, J. W. Fowler, R. P. Fisher, R. Dünner, W. B. Doriese, S. R. Dicker, M. J. Devlin, J. Chervenak, B. Burger, E. S. Battistelli, J. Appel, M. Amiri, C. Allen, and A. M. Aboobaker. 2008. "A Kilopixel Array of TES Bolometers for ACT: Development, Testing, and First Light." Journal of Low Temperature Physics 151 690 [Full Text (Link)] [10.1007/s10909-008-9729-2]

    Switzer, E. R., and C. M. Hirata. 2005. "Ionizing radiation from hydrogen recombination strongly suppresses the lithium scattering signature in the CMB." PRD 72 83002

    Abazajian, K., E. R. Switzer, S. Dodelson, K. Heitmann, and S. Habib. 2005. "Nonlinear cosmological matter power spectrum with massive neutrinos: The halo model." PRD 71 43507

    Non-Refereed

    Mirzaei, M., E. M. Barrentine, B. T. Bulcha, et al. G. Cataldo, J. A. Connors, N. Ehsan, T. M. Essinger-Hileman, L. A. Hess, J. W. Mugge-Durum, O. Noroozian, T. M. Oxholm, T. R. Stevenson, E. R. Switzer, C. G. Volpert, and E. J. Wollack. 2020. "µ-spec spectrometers for the EXCLAIM instrument." Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X [10.1117/12.2562446]

    Cataldo, G., P. A. Ade, C. J. Anderson, et al. A. Barlis, E. M. Barrentine, N. G. Bellis, A. D. Bolatto, P. C. Breysse, B. T. Bulcha, J. A. Connors, P. W. Cursey, N. Ehsan, T. M. Essinger-Hileman, J. Glenn, J. Golec, J. Hays-Wehle, L. A. Hess, A. Jahromi, M. O. Kimball, A. J. Kogut, L. N. Lowe, P. D. Mauskopf, J. J. McMahon, M. Mirzaei, S. H. Moseley, J. W. Mugge-Durum, O. Noroozian, T. M. Oxholm, U.-L. Pen, A. R. Pullen, S. Rodriguez, P. J. Shirron, G. Siebert, A. K. Sinclair, R. S. Somerville, R. Stephenson, T. R. Stevenson, E. R. Switzer, P. T. Timbie, C. E. Tucker, E. Visbal, C. G. Volpert, E. J. Wollack, and S. Yang. 2020. "Overview and status of EXCLAIM, the experiment for cryogenic large-aperture intensity mapping." Ground-based and Airborne Telescopes VIII [10.1117/12.2561069]

    Essinger-Hileman, T. M., T. M. Oxholm, G. L. Siebert, et al. P. A. Ade, C. J. Anderson, A. Barlis, E. M. Barrentine, J. Beeman, N. G. Bellis, P. C. Breysse, A. D. Bolatto, B. T. Bulcha, G. Cataldo, J. A. Connors, P. W. Cursey, N. Ehsan, L.-R. Fernandez, J. Glenn, J. E. Golec, J. Hays-Wehle, L. Hess, A. E. Jahromi, M. O. Kimball, A. Kogut, L. N. Lowe, P. Mauskopf, J. McMahon, M. Mirzaei, H. Moseley, J. Mugge-Durum, O. Noroozian, U.-L. Pen, A. R. Pullen, S. Rodriguez, K. Shire, A. Sinclair, R. S. Somerville, T. R. Stevenson, E. R. Switzer, P. Timbie, C. Tucker, E. Visbal, C. G. Volpert, E. J. Wollack, and S. Yang. 2020. "Optical Design of the Experiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)." Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X [10.1117/12.2576254]

                                                                                                                                                                                            
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