Dr. Rosemary Margaret Killen

Dr. Rosemary Margaret Killen

  • RESEARCH AST, PLANETARY STUDIES
  • 301.286.6574
  • NASA/GSFC
  • Mail Code: 695
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Dr. Killen has published extensively on the exospheres of Mercury and the Moon.
    She was a Participating Scientist on the MESSENGER Mission to Mercury and Deputy PI on the DREAM2 node of the Solar System Exploration Virtual Institute, Co-I on STROFIO, a mass spectrometer on Bepi-Colombo. She has observed Mercury, the Moon and the Galilean satellites at many major observatories. She is interested in the physics of space weathering and the interactions of the solar wind plasma with the surfaces of planets and satellites to produce exospheres. She has over 100 papers published in the refereed literature and almost 200 abstracts presented at scientific meetings.
     

    Research Interests

    Research Scientist

    I study the exospheres of the Moon and Mercury via ground-based spectroscopy, space-based ultraviolet spectroscopy, and mathematical modeling using analytical and Monte Carlo  models.

    Education

    • Rice University, Space Physics and Astronomy, Ph.D. 1987
    • University of Texas at Austin, Astronomy, MS 1975
    • Southwestern University, Mathematics and Physics, BS 1971
     

    Professional Societies

    American Astronomical Society Division for Planetary Science; American Geophysical Society; International Astronomical Union, 1985 - Present
    Full member
    International Astronomical Union, 2007 - Present

    Awards

    RHG Exceptional Achievement for Science, 2018

    Solar System Division Peer Award, 2014

    Publications

    Refereed

    Farrell, W. M., R. M. Killen, and M. Benna. 2018. "The Dust, Atmosphere and Plasma at the Moon." New Views of the Moon 2,

    Merkel, A. W., R. J. Vervack, R. M. Killen, et al. T. A. Cassidy, W. E. McClintock, L. R. Nittler, and M. H. Burger. 2018. "Evidence Connecting Mercury's Magnesium Exosphere to Its Magnesium-Rich Surface Terrane." Geophysical Research Letters, [10.1029/2018gl078407]

    Killen, R. M., M. H. Burger, and W. M. Farrell. 2018. "Exospheric escape: A parametrical study." Advances in Space Research, 62 (8): 2364-2371 [10.1016/j.asr.2017.06.015]

    Killen, R. M. 2018. "Lunar Atmosphere: Source and Loss Processes." Encyclopedia of Lunar Science, New York: (In Press)

    Killen, R. M. 2018. "Understanding Mercury's Exosphere: Models derived from MESSENGER observations." Mercury: The View After MESSENGER, London: ISBN: 9781316650685. (In Press)

    Killen, R. M. 2018. "Extraterrestrial Meteors." Meteoroids: Sources of Meteors on Earth and Beyond, (In Press)

    Merkel, A. W., T. A. Cassidy, R. J. Vervack, et al. W. E. McClintock, M. Sarantos, M. H. Burger, and R. M. Killen. 2017. "Seasonal variations of Mercury's magnesium dayside exosphere from MESSENGER observations." Icarus, 281: 46-54 [10.1016/j.icarus.2016.08.032]

    Hurley, D. M., J. C. Cook, K. D. Retherford, et al. T. Greathouse, G. R. Gladstone, K. Mandt, C. Grava, D. Kaufmann, A. Hendrix, P. D. Feldman, W. Pryor, A. Stickle, R. M. Killen, and S. A. Stern. 2017. "Contributions of solar wind and micrometeoroids to molecular hydrogen in the lunar exosphere." Icarus, 283: 31-37 [10.1016/j.icarus.2016.04.019]

    Killen, R. M. 2016. "Pathways for energization of Ca in Mercury’s exosphere." Icarus, 268: 32-36 [10.1016/j.icarus.2015.12.035]

    Bida, T. A., and R. M. Killen. 2016. "Observations of the minor species Al and Fe in Mercury's exosphere." Icarus, [10.1016/j.icarus.2016.10.019]

    Farrell, W., D. Hurley, M. Poston, et al. M. Zimmerman, T. Orlando, C. Hibbitts, and R. Killen. 2016. "The gas-surface interaction of a human-occupied spacecraft with a near-Earth object." Advances in Space Research, 58 (9): 1648-1653 [10.1016/j.asr.2016.08.031]

    Cassidy, T. A., W. E. McClintock, R. M. Killen, et al. M. Sarantos, A. W. Merkel, R. J. Vervack, and M. H. Burger. 2016. "A cold-pole enhancement in Mercury's sodium exosphere." Geophysical Research Letters, 43 (21): 11,121-11,128 [10.1002/2016gl071071]

    Vervack, R. J., R. M. Killen, W. E. McClintock, et al. A. W. Merkel, M. H. Burger, T. A. Cassidy, and M. Sarantos. 2016. "New discoveries from MESSENGER and insights into Mercury's exosphere." Geophysical Research Letters, 43 (22): 11,545-11,551 [10.1002/2016gl071284]

    Cassidy, T. A., A. W. Merkel, M. H. Burger, et al. M. Sarantos, R. M. Killen, W. E. McClintock, and R. J. Vervack. 2015. "Mercury’s seasonal sodium exosphere: MESSENGER orbital observations." Icarus, 248: 547-559 [10.1016/j.icarus.2014.10.037]

    Killen, R. M., and J. M. Hahn. 2015. "Impact vaporization as a possible source of Mercury’s calcium exosphere." Icarus, 250: 230-237 [10.1016/j.icarus.2014.11.035]

    Christou, A. A., R. M. Killen, and M. H. Burger. 2015. "The meteoroid stream of comet Encke at Mercury: Implications for MErcury Surface, Space ENvironment, GEochemistry, and Ranging observations of the exosphere." Geophysical Research Letters, 42 (18): 7311-7318 [10.1002/2015gl065361]

    Domingue, D. L., C. R. Chapman, R. M. Killen, et al. T. H. Zurbuchen, J. A. Gilbert, M. Sarantos, M. Benna, J. A. Slavin, D. Schriver, P. M. Trávníček, T. M. Orlando, A. L. Sprague, D. T. Blewett, J. J. Gillis-Davis, W. C. Feldman, D. J. Lawrence, G. C. Ho, D. S. Ebel, L. R. Nittler, F. Vilas, C. M. Pieters, S. C. Solomon, C. L. Johnson, R. M. Winslow, J. Helbert, P. N. Peplowski, S. Z. Weider, N. Mouawad, N. R. Izenberg, and W. E. McClintock. 2014. "Mercury’s Weather-Beaten Surface: Understanding Mercury in the Context of Lunar and Asteroidal Space Weathering Studies." Space Sci Rev, 181 (1-4): 121-214 [10.1007/s11214-014-0039-5]

    Burger, M. H., R. M. Killen, W. E. McClintock, et al. A. W. Merkel, R. J. Vervack, T. A. Cassidy, and M. Sarantos. 2014. "Seasonal variations in Mercury’s dayside calcium exosphere." Icarus, 238: 51-58 [10.1016/j.icarus.2014.04.049]

    Farrell, W. M., A. R. Poppe, M. I. Zimmerman, et al. J. S. Halekas, G. T. Delory, and R. M. Killen. 2013. "The lunar photoelectron sheath: A change in trapping efficiency during a solar storm." Journal of Geophysical Research: Planets, 118 (5): 1114-1122 [10.1002/jgre.20086]

    Potter, A., R. Killen, K. P. Reardon, and T. Bida. 2013. "Observation of neutral sodium above Mercury during the transit of November 8, 2006." Icarus, 226 (1): 172-185 [10.1016/j.icarus.2013.05.029]

    Farrell, W. M., J. S. Halekas, R. M. Killen, et al. G. T. Delory, N. Gross, L. V. Bleacher, D. Krauss-Varben, P. Travnicek, D. Hurley, T. J. Stubbs, M. I. Zimmerman, and T. L. Jackson. 2012. "Solar-Storm/Lunar Atmosphere Model (SSLAM): An overview of the effort and description of the driving storm environment." Journal of Geophysical Research, 117: E00K04 [10.1029/2012je004070]

    Killen, R. M., D. M. Hurley, and W. M. Farrell. 2012. "The effect on the lunar exosphere of a coronal mass ejection passage." Journal of Geophysical Research, 117: E00K02 [10.1029/2011je004011]

    Sarantos, M., R. E. Hartle, R. M. Killen, et al. Y. Saito, J. A. Slavin, and A. Glocer. 2012. "Flux estimates of ions from the lunar exosphere." Geophysical Research Letters, 39: 13101 [10.1029/2012GL052001]

    Sarantos, M., R. M. Killen, D. A. Glenar, M. Benna, and T. J. Stubbs. 2012. "Metallic species, oxygen and silicon in the lunar exosphere: Upper limits and prospects for LADEE measurements." Journal of Geophysical Research, 117 (A3): A03103 [10.1029/2011ja017044]

    Slavin, J. A., S. M. Imber, S. A. Boardsen, et al. G. A. DiBraccio, T. Sundberg, M. Sarantos, T. Nieves-Chinchilla, A. Szabo, B. J. Anderson, H. Korth, T. H. Zurbuchen, J. M. Raines, C. L. Johnson, R. M. Winslow, R. M. Killen, R. L. McNutt, and S. C. Solomon. 2012. "MESSENGER observations of a flux-transfer-event shower at Mercury." Journal of Geophysical Research: Space Physics, 117 (A12): [10.1029/2012ja017926]

    Burger, M. H., R. M. Killen, W. E. McClintock, et al. R. J. Vervack, A. W. Merkel, A. L. Sprague, and M. Sarantos. 2012. "Modeling MESSENGER observations of calcium in Mercury's exosphere." Journal of Geophysical Research: Planets, 117 (E12): [10.1029/2012je004158]

    Mouawad, N., M. H. Burger, R. M. Killen, et al. A. E. Potter, W. E. McClintock, R. J. Vervack, E. T. Bradley, M. Benna, and S. Naidu. 2011. "Constraints on Mercury’s Na exosphere: Combined MESSENGER and ground-based data." Icarus, 211 (1): 21-36 [10.1016/j.icarus.2010.10.019]

    Jackson, T. L., W. M. Farrell, R. M. Killen, et al. G. Delory, J. S. Halekas, and T. J. Stubbs. 2011. ""Discharging of Roving Objects in the Lunar Polar Regions"." Journal of Spacecraft and Rockets, 48 (4): 700-704 [10.2514/1.51897]

    Farrell, W. M., J. Halekas, T. J. Stubbs, et al. G. Delory, R. Killen, R. Hartle, and M. Collier. 2011. "Regarding the possible generation of a lunar nightside exo-ionosphere." Icarus, 216 (1): 169-172 [10.1016/j.icarus.2011.08.013]

    Sarantos, M., R. M. Killen, W. E. McClintock, et al. E. Todd Bradley, R. J. Vervack, M. Benna, and J. A. Slavin. 2011. "Limits to Mercury's magnesium exosphere from MESSENGER second flyby observations." Planetary and Space Science, 59 (15): 1992-2003 [10.1016/j.pss.2011.05.002]

    Benna, M., B. Anderson, D. Baker, et al. S. A. Boardsen, G. Gloeckler, R. Gold, G. Ho, R. M. Killen, H. Korth, S. Krimigis, M. E. Purucker, R. McNutt, J. Raines, W. McClintock, M. Sarantos, J. A. Slavin, S. Solomon, and T. Zurbuchen. 2010. "Modeling of the magnetosphere of Mercury at the time of the first MESSENGER flyby ." Icarus, 209 (1): 3-10.

    Farrell, W. M., T. J. Stubbs, J. S. Halekas, et al. R. M. Killen, G. T. Delory, M. Collier, and R. R. Vondrak. 2010. "Anticipated electrical environment within permanently shadowed lunar craters." Journal of Geophysical Research, 115 (E3): E03004 [Full Text (Link)] [10.1029/2009JE003464]

    Killen, R. M., A. E. Potter, R. J. Vervack, et al. E. T. Bradley, W. E. McClintock, C. M. Anderson, and M. H. Burger. 2010. "Observations of metallic species in Mercury’s exosphere." Icarus, 209 (1): 75-87 [10.1016/j.icarus.2010.02.018]

    Killen, R. M., A. E. Potter, D. M. Hurley, C. Plymate, and S. Naidu. 2010. "Observations of the lunar impact plume from the LCROSS event." Geophysical Research Letters, 37 (23): [10.1029/2010gl045508]

    Anderson, B. J., D. Baker, S. A. Boardsen, et al. R. M. Killen, H. Korth, S. M. Krimigis, M. E. Purucker, R. L. McNutt, J. M. Raines, W. E. McClintock, M. Sarantos, J. A. Slavin, S. C. Solomon, D. Schriver, P. Travnicek, and T. Zurbuchen. 2009. "MHD modeling of the interaction of the magnetosphere of Mercury with the solar wind during the MESSENGER flybys." AGU Fall Meeting Abstracts, A8-:

    Slavin, J. A., B. J. Anderson, D. Baker, et al. S. A. Boardsen, C. L. Johnson, G. Gloeckler, R. E. Gold, R. M. Killen, H. Korth, S. M. Krimigis, W. E. McClintock, R. L. McNutt, M. E. Purucker, M. Sarantos, D. Schriver, S. C. Solomon, A. L. Sprague, R. J. Vervack, T. Zurbuchen, and P. Travnicek. 2009. "Mercury’s atmosphere and magnetosphere: MESSENGER third flyby observations (Invited)." AGU Fall Meeting Abstracts, A1-:

    Cooper, J. F., R. E. Hartle, E. C. Sittler, et al. M. A. McGrath, C. J. Alexander, J. B. Dalton, D. Pascu, C. Paranicas, C. Hibbitts, M. E. Hill, P. D. Cooper, R. E. Johnson, T. A. Cassidy, T. M. Orlando, L. J. Lanzerotti, N. A. Schwadron, K. D. Retherford, R. I. Kaiser, F. Leblanc, S. J. Sturner, and R. M. Killen. 2009. "Space Weathering Impact on Solar System Surfaces and Planetary Mission Science." AGU Fall Meeting Abstracts, 1465-:

    Hartle, R. E., M. Sarantos, R. M. Killen, et al. E. C. Sittler, J. S. Halekas, S. Yokota, Y. Saito, and W. Farrell. 2009. "Lunar Neutral Exosphere Properties from Pickup Ion Analysis." AGU Fall Meeting Abstracts, 1266-:

    Potter, A., T. Morgan, and R. Killen. 2009. "Sodium winds on Mercury." Icarus, 204 (2): 355-367 [10.1016/j.icarus.2009.06.028]

    Sarantos, M., J. A. Slavin, S. A. Boardsen, and R. M. Killen. 2008. "Distribution of sodium pickup ions during MESSENGER's first and second Mercury flybys: constraints on exospheric models." AGU Fall Meeting Abstracts, A43-:

    Potter, A., and R. Killen. 2008. "Observations of the sodium tail of Mercury." Icarus, 194 (1): 1-12 [10.1016/j.icarus.2007.09.023]

    Zurbuchen, T. H., J. M. Raines, G. Gloeckler, et al. S. M. Krimigis, J. A. Slavin, P. L. Koehn, R. M. Killen, A. L. Sprague, R. L. McNutt, and S. C. Solomon. 2008. "MESSENGER Observations of the Composition of Mercury's Ionized Exosphere and Plasma Environment." Science, 321 (5885): 90-92 [10.1126/science.1159314]

    Slavin, J. A., M. H. Acuna, B. J. Anderson, et al. D. N. Baker, M. Benna, G. Gloeckler, R. E. Gold, G. C. Ho, R. M. Killen, H. Korth, S. M. Krimigis, R. L. McNutt, L. R. Nittler, J. M. Raines, D. Schriver, S. C. Solomon, R. D. Starr, P. Travnicek, and T. H. Zurbuchen. 2008. "Mercury's Magnetosphere After MESSENGER's First Flyby." Science, 321 (5885): 85-89 [10.1126/science.1159040]

    Kallio, E., P. Wurz, R. Killen, et al. S. McKenna-Lawlor, A. Milillo, A. Mura, S. Massetti, S. Orsini, H. Lammer, P. Janhunen, and W.-H. Ip. 2008. "On the impact of multiply charged heavy solar wind ions on the surface of Mercury, the Moon and Ceres." Planetary and Space Science, 56 (11): 1506-1516 [10.1016/j.pss.2008.07.018]

    Leblanc, F., E. Chassefière, R. Johnson, et al. D. Hunten, E. Kallio, D. Delcourt, R. Killen, J. Luhmann, A. Potter, A. Jambon, G. Cremonese, M. Mendillo, N. Yan, and A. Sprague. 2007. "Mercury's exosphere origins and relations to its magnetosphere and surface." Planetary and Space Science, 55 (9): 1069-1092 [10.1016/j.pss.2006.11.008]

    Domingue, D. L., P. L. Koehn, R. M. Killen, et al. A. L. Sprague, M. Sarantos, A. F. Cheng, E. T. Bradley, and W. E. McClintock. 2007. "Mercury’s Atmosphere: A Surface-Bounded Exosphere." Space Sci Rev, 131 (1-4): 161-186 [10.1007/s11214-007-9260-9]

    Sarantos, M., R. M. Killen, and D. Kim. 2007. "Predicting the long-term solar wind ion-sputtering source at Mercury." Planetary and Space Science, 55 (11): 1584-1595 [10.1016/j.pss.2006.10.011]

    Killen, R., G. Cremonese, H. Lammer, et al. S. Orsini, A. E. Potter, A. L. Sprague, P. Wurz, M. L. Khodachenko, H. I. Lichtenegger, A. Milillo, and A. Mura. 2007. "Processes that Promote and Deplete the Exosphere of Mercury." Space Sci Rev, 132 (2-4): 433-509 [10.1007/s11214-007-9232-0]

    Hartle, R. E., and R. Killen. 2006. "Measuring pickup ions to characterize the surfaces and exospheres of planetary bodies: Applications to the Moon." Geophysical Research Letters, 33 (5): L05201 [10.1029/2005gl024520]

    Crider, D., R. Killen, and R. Vondrak. 2006. "Ice on the Moon and Mercury." Advances in Geosci, 3: 93-102.

    Potter, A., R. Killen, and M. Sarantos. 2006. "Spatial distribution of sodium on Mercury." Icarus, 181 (1): 1-12 [10.1016/j.icarus.2005.10.026]

    Killen, R. 2006. "Curve‐of‐Growth Model for Sodium D2 Emission at Mercury." Publications of the Astronomical Society of the Pacific, 118 (847): 1344-1350 [10.1086/508070]

    Leblanc, F., A. Potter, R. Killen, and R. Johnson. 2005. "Origins of Europa Na cloud and torus." Icarus, 178 (2): 367-385 [10.1016/j.icarus.2005.03.027]

    Nittler, L. R., R. D. Starr, L. F. Lim, et al. T. J. McCoy, T. H. Burbine, R. C. Reedy, J. I. Trombka, P. Gorenstein, S. W. Squyres, W. V. Boynton, T. P. McClanahan, J. S. Bhangoo, P. E. Clark, M. E. Murphy, and R. Killen. 2001. "X-ray fluorescence measurements of the surface elemental composition of asteroid 433 Eros." Meteoritics and Planetary Science, 36: 1673-1695 [10.1111/j.1945-5100.2001.tb01856.x]

    Killen, R., and F. M. Flasar. 1996. "Microwave Sounding of the Giant Planets." Icarus, 119 (1): 67-89 [10.1006/icar.1996.0003]

    Non-Refereed

    Farrell, W. M., J. E. Bleacher, T. J. Ames, et al. L. M. Carter, C. Y. Cheung, M. R. Collier, J. F. Cooper, R. L. Hudson, T. L. Jackson, J. W. Keller, R. M. Killen, M. M. Kuznetsova, M. J. Loeffler, R. J. MacDowall, A. M. Parsons, N. E. Petro, A. A. Pulkkinen, Y. Zheng, and M. I. Zimmerman. 2013. "'Where to Hide?': A Tele-Robotic Application for HEOMD's Earth-Moon L2 Mission." Lunar and Planetary Institute Science Conference Abstracts 44: 2514.

    Selected Public Outreach

    New Views of Mercury's Exosphere from MESSENGER 10 / 2018 - 10 / Present
    https://pubs.er.usgs.gov/publications

    Public talk at the Geological Society of Wshington, Given at the COSMOS  Club, Washington, DC

    October 24, 2018

    Brief Bio

    Dr. Killen has published extensively on the exospheres of Mercury and the Moon.
    She was a Participating Scientist on the MESSENGER Mission to Mercury and Deputy PI on the DREAM2 node of the Solar System Exploration Virtual Institute, Co-I on STROFIO, a mass spectrometer on Bepi-Colombo. She has observed Mercury, the Moon and the Galilean satellites at many major observatories. She is interested in the physics of space weathering and the interactions of the solar wind plasma with the surfaces of planets and satellites to produce exospheres. She has over 100 papers published in the refereed literature and almost 200 abstracts presented at scientific meetings.
     

    Publications

    Refereed

    Farrell, W. M., R. M. Killen, and M. Benna. 2018. "The Dust, Atmosphere and Plasma at the Moon." New Views of the Moon 2

    Merkel, A. W., R. J. Vervack, R. M. Killen, et al. T. A. Cassidy, W. E. McClintock, L. R. Nittler, and M. H. Burger. 2018. "Evidence Connecting Mercury's Magnesium Exosphere to Its Magnesium-Rich Surface Terrane." Geophysical Research Letters [10.1029/2018gl078407]

    Killen, R. M., M. H. Burger, and W. M. Farrell. 2018. "Exospheric escape: A parametrical study." Advances in Space Research 62 (8): 2364-2371 [10.1016/j.asr.2017.06.015]

    Killen, R. M. 2018. "Lunar Atmosphere: Source and Loss Processes." Encyclopedia of Lunar Science (In Press)

    Killen, R. M. 2018. "Understanding Mercury's Exosphere: Models derived from MESSENGER observations." Mercury: The View After MESSENGER (In Press)

    Killen, R. M. 2018. "Extraterrestrial Meteors." Meteoroids: Sources of Meteors on Earth and Beyond (In Press)

    Merkel, A. W., T. A. Cassidy, R. J. Vervack, et al. W. E. McClintock, M. Sarantos, M. H. Burger, and R. M. Killen. 2017. "Seasonal variations of Mercury's magnesium dayside exosphere from MESSENGER observations." Icarus 281 46-54 [10.1016/j.icarus.2016.08.032]

    Hurley, D. M., J. C. Cook, K. D. Retherford, et al. T. Greathouse, G. R. Gladstone, K. Mandt, C. Grava, D. Kaufmann, A. Hendrix, P. D. Feldman, W. Pryor, A. Stickle, R. M. Killen, and S. A. Stern. 2017. "Contributions of solar wind and micrometeoroids to molecular hydrogen in the lunar exosphere." Icarus 283 31-37 [10.1016/j.icarus.2016.04.019]

    Killen, R. M. 2016. "Pathways for energization of Ca in Mercury’s exosphere." Icarus 268 32-36 [10.1016/j.icarus.2015.12.035]

    Bida, T. A., and R. M. Killen. 2016. "Observations of the minor species Al and Fe in Mercury's exosphere." Icarus [10.1016/j.icarus.2016.10.019]

    Farrell, W., D. Hurley, M. Poston, et al. M. Zimmerman, T. Orlando, C. Hibbitts, and R. Killen. 2016. "The gas-surface interaction of a human-occupied spacecraft with a near-Earth object." Advances in Space Research 58 (9): 1648-1653 [10.1016/j.asr.2016.08.031]

    Cassidy, T. A., W. E. McClintock, R. M. Killen, et al. M. Sarantos, A. W. Merkel, R. J. Vervack, and M. H. Burger. 2016. "A cold-pole enhancement in Mercury's sodium exosphere." Geophysical Research Letters 43 (21): 11,121-11,128 [10.1002/2016gl071071]

    Vervack, R. J., R. M. Killen, W. E. McClintock, et al. A. W. Merkel, M. H. Burger, T. A. Cassidy, and M. Sarantos. 2016. "New discoveries from MESSENGER and insights into Mercury's exosphere." Geophysical Research Letters 43 (22): 11,545-11,551 [10.1002/2016gl071284]

    Cassidy, T. A., A. W. Merkel, M. H. Burger, et al. M. Sarantos, R. M. Killen, W. E. McClintock, and R. J. Vervack. 2015. "Mercury’s seasonal sodium exosphere: MESSENGER orbital observations." Icarus 248 547-559 [10.1016/j.icarus.2014.10.037]

    Killen, R. M., and J. M. Hahn. 2015. "Impact vaporization as a possible source of Mercury’s calcium exosphere." Icarus 250 230-237 [10.1016/j.icarus.2014.11.035]

    Christou, A. A., R. M. Killen, and M. H. Burger. 2015. "The meteoroid stream of comet Encke at Mercury: Implications for MErcury Surface, Space ENvironment, GEochemistry, and Ranging observations of the exosphere." Geophysical Research Letters 42 (18): 7311-7318 [10.1002/2015gl065361]

    Domingue, D. L., C. R. Chapman, R. M. Killen, et al. T. H. Zurbuchen, J. A. Gilbert, M. Sarantos, M. Benna, J. A. Slavin, D. Schriver, P. M. Trávníček, T. M. Orlando, A. L. Sprague, D. T. Blewett, J. J. Gillis-Davis, W. C. Feldman, D. J. Lawrence, G. C. Ho, D. S. Ebel, L. R. Nittler, F. Vilas, C. M. Pieters, S. C. Solomon, C. L. Johnson, R. M. Winslow, J. Helbert, P. N. Peplowski, S. Z. Weider, N. Mouawad, N. R. Izenberg, and W. E. McClintock. 2014. "Mercury’s Weather-Beaten Surface: Understanding Mercury in the Context of Lunar and Asteroidal Space Weathering Studies." Space Sci Rev 181 (1-4): 121-214 [10.1007/s11214-014-0039-5]

    Burger, M. H., R. M. Killen, W. E. McClintock, et al. A. W. Merkel, R. J. Vervack, T. A. Cassidy, and M. Sarantos. 2014. "Seasonal variations in Mercury’s dayside calcium exosphere." Icarus 238 51-58 [10.1016/j.icarus.2014.04.049]

    Farrell, W. M., A. R. Poppe, M. I. Zimmerman, et al. J. S. Halekas, G. T. Delory, and R. M. Killen. 2013. "The lunar photoelectron sheath: A change in trapping efficiency during a solar storm." Journal of Geophysical Research: Planets 118 (5): 1114-1122 [10.1002/jgre.20086]

    Potter, A., R. Killen, K. P. Reardon, and T. Bida. 2013. "Observation of neutral sodium above Mercury during the transit of November 8, 2006." Icarus 226 (1): 172-185 [10.1016/j.icarus.2013.05.029]

    Farrell, W. M., J. S. Halekas, R. M. Killen, et al. G. T. Delory, N. Gross, L. V. Bleacher, D. Krauss-Varben, P. Travnicek, D. Hurley, T. J. Stubbs, M. I. Zimmerman, and T. L. Jackson. 2012. "Solar-Storm/Lunar Atmosphere Model (SSLAM): An overview of the effort and description of the driving storm environment." Journal of Geophysical Research 117 E00K04 [10.1029/2012je004070]

    Killen, R. M., D. M. Hurley, and W. M. Farrell. 2012. "The effect on the lunar exosphere of a coronal mass ejection passage." Journal of Geophysical Research 117 E00K02 [10.1029/2011je004011]

    Sarantos, M., R. E. Hartle, R. M. Killen, et al. Y. Saito, J. A. Slavin, and A. Glocer. 2012. "Flux estimates of ions from the lunar exosphere." Geophysical Research Letters 39 13101 [10.1029/2012GL052001]

    Sarantos, M., R. M. Killen, D. A. Glenar, M. Benna, and T. J. Stubbs. 2012. "Metallic species, oxygen and silicon in the lunar exosphere: Upper limits and prospects for LADEE measurements." Journal of Geophysical Research 117 (A3): A03103 [10.1029/2011ja017044]

    Slavin, J. A., S. M. Imber, S. A. Boardsen, et al. G. A. DiBraccio, T. Sundberg, M. Sarantos, T. Nieves-Chinchilla, A. Szabo, B. J. Anderson, H. Korth, T. H. Zurbuchen, J. M. Raines, C. L. Johnson, R. M. Winslow, R. M. Killen, R. L. McNutt, and S. C. Solomon. 2012. "MESSENGER observations of a flux-transfer-event shower at Mercury." Journal of Geophysical Research: Space Physics 117 (A12): [10.1029/2012ja017926]

    Burger, M. H., R. M. Killen, W. E. McClintock, et al. R. J. Vervack, A. W. Merkel, A. L. Sprague, and M. Sarantos. 2012. "Modeling MESSENGER observations of calcium in Mercury's exosphere." Journal of Geophysical Research: Planets 117 (E12): [10.1029/2012je004158]

    Mouawad, N., M. H. Burger, R. M. Killen, et al. A. E. Potter, W. E. McClintock, R. J. Vervack, E. T. Bradley, M. Benna, and S. Naidu. 2011. "Constraints on Mercury’s Na exosphere: Combined MESSENGER and ground-based data." Icarus 211 (1): 21-36 [10.1016/j.icarus.2010.10.019]

    Jackson, T. L., W. M. Farrell, R. M. Killen, et al. G. Delory, J. S. Halekas, and T. J. Stubbs. 2011. ""Discharging of Roving Objects in the Lunar Polar Regions"." Journal of Spacecraft and Rockets 48 (4): 700-704 [10.2514/1.51897]

    Farrell, W. M., J. Halekas, T. J. Stubbs, et al. G. Delory, R. Killen, R. Hartle, and M. Collier. 2011. "Regarding the possible generation of a lunar nightside exo-ionosphere." Icarus 216 (1): 169-172 [10.1016/j.icarus.2011.08.013]

    Sarantos, M., R. M. Killen, W. E. McClintock, et al. E. Todd Bradley, R. J. Vervack, M. Benna, and J. A. Slavin. 2011. "Limits to Mercury's magnesium exosphere from MESSENGER second flyby observations." Planetary and Space Science 59 (15): 1992-2003 [10.1016/j.pss.2011.05.002]

    Benna, M., B. Anderson, D. Baker, et al. S. A. Boardsen, G. Gloeckler, R. Gold, G. Ho, R. M. Killen, H. Korth, S. Krimigis, M. E. Purucker, R. McNutt, J. Raines, W. McClintock, M. Sarantos, J. A. Slavin, S. Solomon, and T. Zurbuchen. 2010. "Modeling of the magnetosphere of Mercury at the time of the first MESSENGER flyby ." Icarus 209 (1): 3-10

    Farrell, W. M., T. J. Stubbs, J. S. Halekas, et al. R. M. Killen, G. T. Delory, M. Collier, and R. R. Vondrak. 2010. "Anticipated electrical environment within permanently shadowed lunar craters." Journal of Geophysical Research 115 (E3): E03004 [Full Text (Link)] [10.1029/2009JE003464]

    Killen, R. M., A. E. Potter, R. J. Vervack, et al. E. T. Bradley, W. E. McClintock, C. M. Anderson, and M. H. Burger. 2010. "Observations of metallic species in Mercury’s exosphere." Icarus 209 (1): 75-87 [10.1016/j.icarus.2010.02.018]

    Killen, R. M., A. E. Potter, D. M. Hurley, C. Plymate, and S. Naidu. 2010. "Observations of the lunar impact plume from the LCROSS event." Geophysical Research Letters 37 (23): [10.1029/2010gl045508]

    Anderson, B. J., D. Baker, S. A. Boardsen, et al. R. M. Killen, H. Korth, S. M. Krimigis, M. E. Purucker, R. L. McNutt, J. M. Raines, W. E. McClintock, M. Sarantos, J. A. Slavin, S. C. Solomon, D. Schriver, P. Travnicek, and T. Zurbuchen. 2009. "MHD modeling of the interaction of the magnetosphere of Mercury with the solar wind during the MESSENGER flybys." AGU Fall Meeting Abstracts A8-

    Slavin, J. A., B. J. Anderson, D. Baker, et al. S. A. Boardsen, C. L. Johnson, G. Gloeckler, R. E. Gold, R. M. Killen, H. Korth, S. M. Krimigis, W. E. McClintock, R. L. McNutt, M. E. Purucker, M. Sarantos, D. Schriver, S. C. Solomon, A. L. Sprague, R. J. Vervack, T. Zurbuchen, and P. Travnicek. 2009. "Mercury’s atmosphere and magnetosphere: MESSENGER third flyby observations (Invited)." AGU Fall Meeting Abstracts A1-

    Cooper, J. F., R. E. Hartle, E. C. Sittler, et al. M. A. McGrath, C. J. Alexander, J. B. Dalton, D. Pascu, C. Paranicas, C. Hibbitts, M. E. Hill, P. D. Cooper, R. E. Johnson, T. A. Cassidy, T. M. Orlando, L. J. Lanzerotti, N. A. Schwadron, K. D. Retherford, R. I. Kaiser, F. Leblanc, S. J. Sturner, and R. M. Killen. 2009. "Space Weathering Impact on Solar System Surfaces and Planetary Mission Science." AGU Fall Meeting Abstracts 1465-

    Hartle, R. E., M. Sarantos, R. M. Killen, et al. E. C. Sittler, J. S. Halekas, S. Yokota, Y. Saito, and W. Farrell. 2009. "Lunar Neutral Exosphere Properties from Pickup Ion Analysis." AGU Fall Meeting Abstracts 1266-

    Potter, A., T. Morgan, and R. Killen. 2009. "Sodium winds on Mercury." Icarus 204 (2): 355-367 [10.1016/j.icarus.2009.06.028]

    Sarantos, M., J. A. Slavin, S. A. Boardsen, and R. M. Killen. 2008. "Distribution of sodium pickup ions during MESSENGER's first and second Mercury flybys: constraints on exospheric models." AGU Fall Meeting Abstracts A43-

    Potter, A., and R. Killen. 2008. "Observations of the sodium tail of Mercury." Icarus 194 (1): 1-12 [10.1016/j.icarus.2007.09.023]

    Zurbuchen, T. H., J. M. Raines, G. Gloeckler, et al. S. M. Krimigis, J. A. Slavin, P. L. Koehn, R. M. Killen, A. L. Sprague, R. L. McNutt, and S. C. Solomon. 2008. "MESSENGER Observations of the Composition of Mercury's Ionized Exosphere and Plasma Environment." Science 321 (5885): 90-92 [10.1126/science.1159314]

    Slavin, J. A., M. H. Acuna, B. J. Anderson, et al. D. N. Baker, M. Benna, G. Gloeckler, R. E. Gold, G. C. Ho, R. M. Killen, H. Korth, S. M. Krimigis, R. L. McNutt, L. R. Nittler, J. M. Raines, D. Schriver, S. C. Solomon, R. D. Starr, P. Travnicek, and T. H. Zurbuchen. 2008. "Mercury's Magnetosphere After MESSENGER's First Flyby." Science 321 (5885): 85-89 [10.1126/science.1159040]

    Kallio, E., P. Wurz, R. Killen, et al. S. McKenna-Lawlor, A. Milillo, A. Mura, S. Massetti, S. Orsini, H. Lammer, P. Janhunen, and W.-H. Ip. 2008. "On the impact of multiply charged heavy solar wind ions on the surface of Mercury, the Moon and Ceres." Planetary and Space Science 56 (11): 1506-1516 [10.1016/j.pss.2008.07.018]

    Leblanc, F., E. Chassefière, R. Johnson, et al. D. Hunten, E. Kallio, D. Delcourt, R. Killen, J. Luhmann, A. Potter, A. Jambon, G. Cremonese, M. Mendillo, N. Yan, and A. Sprague. 2007. "Mercury's exosphere origins and relations to its magnetosphere and surface." Planetary and Space Science 55 (9): 1069-1092 [10.1016/j.pss.2006.11.008]

    Domingue, D. L., P. L. Koehn, R. M. Killen, et al. A. L. Sprague, M. Sarantos, A. F. Cheng, E. T. Bradley, and W. E. McClintock. 2007. "Mercury’s Atmosphere: A Surface-Bounded Exosphere." Space Sci Rev 131 (1-4): 161-186 [10.1007/s11214-007-9260-9]

    Sarantos, M., R. M. Killen, and D. Kim. 2007. "Predicting the long-term solar wind ion-sputtering source at Mercury." Planetary and Space Science 55 (11): 1584-1595 [10.1016/j.pss.2006.10.011]

    Killen, R., G. Cremonese, H. Lammer, et al. S. Orsini, A. E. Potter, A. L. Sprague, P. Wurz, M. L. Khodachenko, H. I. Lichtenegger, A. Milillo, and A. Mura. 2007. "Processes that Promote and Deplete the Exosphere of Mercury." Space Sci Rev 132 (2-4): 433-509 [10.1007/s11214-007-9232-0]

    Hartle, R. E., and R. Killen. 2006. "Measuring pickup ions to characterize the surfaces and exospheres of planetary bodies: Applications to the Moon." Geophysical Research Letters 33 (5): L05201 [10.1029/2005gl024520]

    Crider, D., R. Killen, and R. Vondrak. 2006. "Ice on the Moon and Mercury." Advances in Geosci 3 93-102

    Potter, A., R. Killen, and M. Sarantos. 2006. "Spatial distribution of sodium on Mercury." Icarus 181 (1): 1-12 [10.1016/j.icarus.2005.10.026]

    Killen, R. 2006. "Curve‐of‐Growth Model for Sodium D2 Emission at Mercury." Publications of the Astronomical Society of the Pacific 118 (847): 1344-1350 [10.1086/508070]

    Leblanc, F., A. Potter, R. Killen, and R. Johnson. 2005. "Origins of Europa Na cloud and torus." Icarus 178 (2): 367-385 [10.1016/j.icarus.2005.03.027]

    Nittler, L. R., R. D. Starr, L. F. Lim, et al. T. J. McCoy, T. H. Burbine, R. C. Reedy, J. I. Trombka, P. Gorenstein, S. W. Squyres, W. V. Boynton, T. P. McClanahan, J. S. Bhangoo, P. E. Clark, M. E. Murphy, and R. Killen. 2001. "X-ray fluorescence measurements of the surface elemental composition of asteroid 433 Eros." Meteoritics and Planetary Science 36 1673-1695 [10.1111/j.1945-5100.2001.tb01856.x]

    Killen, R., and F. M. Flasar. 1996. "Microwave Sounding of the Giant Planets." Icarus 119 (1): 67-89 [10.1006/icar.1996.0003]

    Non-Refereed

    Farrell, W. M., J. E. Bleacher, T. J. Ames, et al. L. M. Carter, C. Y. Cheung, M. R. Collier, J. F. Cooper, R. L. Hudson, T. L. Jackson, J. W. Keller, R. M. Killen, M. M. Kuznetsova, M. J. Loeffler, R. J. MacDowall, A. M. Parsons, N. E. Petro, A. A. Pulkkinen, Y. Zheng, and M. I. Zimmerman. 2013. "'Where to Hide?': A Tele-Robotic Application for HEOMD's Earth-Moon L2 Mission." Lunar and Planetary Institute Science Conference Abstracts 44 2514

                                                                                                                                                                                            
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