Sciences and Exploration Directorate

Sarah Rose Peacock



Org Code: 667

Mail Code: 667
Greenbelt, MD 20771


Brief Bio

I am interested in the habitability of terrestrial exoplanets as well as other star-planet interactions, primarily relating to the high energy radiation environment to which these planets are exposed. My research is focused on the upper atmospheres and ultraviolet emission from stars. I use the PHOENIX atmosphere code to compute synthetic stellar spectra for exoplanet host stars that span extreme ultraviolet to infrared wavelengths. 

Link to Personal Website

Current Projects

Star-Planet Activity Research CubeSat (SPARCS)

Science Team Member for the NASA-funded mission, SPARCS

Consortium on Habitability and Atmospheres of M-dwarf Planets (CHAMPS)

Task Lead for Star-Planet Interactions for the NASA ICAR program: The M-dwarf Opportunity: Characterizing Nearby M-Dwarf Habitable Zone Planets

Small NASA Optical Ultraviolet Telescope (SNOUT)


Project Scientist for NASA Pioneers Mission Concept


Ph.D., Planetary Sciences, University of Arizona, 2019

Minor: Astrobiology

Dissertation: Predicting the Extreme Ultraviolet Radiation Environment of Exoplanets Around Low-Mass Stars

M.Sc., Planetary Sciences, University of Arizona, 2016

B.A., Astronomy-Physics, University of Virginia, 2013


Gerard P. Kuiper Memorial Award, 2020

NASA Earth and Space Science Fellowship, 2015 – 2018

UA College of Science Galileo Circle Scholarship, 2016


Exposing the Lyman-alpha Profiles of Low-Mass Stars (Program-16646) - HST Cycle 29 - Awarded: 2021-08-12

Leveraging High Radial Velocities to Get to the Core of Planetary Lyman alpha Transits (Program-16731) - HST Cycle 29 - Awarded: 2021-08-12

Tell Me How I’m Supposed to Breathe With No Air: Measuring the Prevalence and Diversity of M-Dwarf Planet Atmospheres (Program-0198) - JWST Cycle 1 - Awarded: 2021-03-30

Observing the Lyman-alpha Transits of Two Sub-Neptunes Orbiting a 400 Myr G Star to Illuminate the Cause of the Exoplanet Radius Valley (Program-16455) - HST Cycle 28 - Awarded: 2020-11-09

Special Experience

American Astronomical Society

Congressional Visit Day Participant, 2019

The National Academies of Sciences, Engineering, and Medicine

Lloyd V. Berkner Space Policy Intern, Space Studies Board, 2016



Peacock, S., T. S. Barman, A. C. Schneider, et al. M. Leung, E. W. Schwieterman, E. L. Shkolnik, and R. P. Loyd. 2022. Accurate Modeling of Lyman-alpha Profiles and their Impact on Photolysis of Terrestrial Planet Atmospheres arXiv e-prints arXiv:2206.05147

Ramiaramanantsoa, T., J. D. Bowman, E. L. Shkolnik, et al. R. P. Loyd, D. R. Ardila, T. Barman, C. Basset, M. Beasley, S. Cheng, J. Gamaunt, V. Gorjian, D. Jacobs, L. Jensen, A. Jewell, M. Knapp, J. Llama, V. Meadows, S. Nikzad, S. Peacock, P. Scowen, and M. R. Swain. 2021. Time-Resolved Photometry of the High-Energy Radiation of M Dwarfs with the Star-Planet Activity Research CubeSat (SPARCS) arXiv e-prints arXiv:2111.02443

Rau, G., S. Peacock, and K. G. Carpenter. 2021. A New Look into K-giants' Chromospheres Research Notes of the American Astronomical Society 5 (4): 73 [10.3847/2515-5172/abf4e4]

Scowen, P. A., D. Ardila, L. Jensen, et al. J. Gamaunt, S. Nikzad, A. Jewell, J. Austin, M. Beasley, E. Shkolnik, T. Barman, J. Bowman, V. Gorjian, D. Gregory, D. Jacobs, J. Llama, M. Knapp, V. Meadows, S. Peacock, T. Ramiaramanantsoa, M. Swain, P. Vedder, L. Whelan, and R. Zellem. 2020. SPARCS payload assembly, integration, and test update Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series 11444 114440A [10.1117/12.2562582]

Melbourne, K., A. Youngblood, K. France, et al. C. Froning, J. S. Pineda, E. L. Shkolnik, D. J. Wilson, B. E. Wood, S. Basu, A. Roberge, J. E. Schlieder, P. W. Cauley, R. P. Loyd, E. R. Newton, A. Schneider, N. Arulanantham, Z. Berta-Thompson, A. Brown, A. P. Buccino, E. Kempton, J. L. Linsky, S. E. Logsdon, P. Mauas, I. Pagano, S. Peacock, S. Redfield, S. Rugheimer, P. C. Schneider, D. Teal, F. Tian, D. Tilipman, and M. Vieytes. 2020. Estimating the Ultraviolet Emission of M Dwarfs with Exoplanets from Ca II and Hensuremathalpha The Astronomical Journal 160 (6): 269 [10.3847/1538-3881/abbf5c]

Peacock, S., T. Barman, E. L. Shkolnik, et al. R. P. Loyd, A. C. Schneider, I. Pagano, and V. S. Meadows. 2020. HAZMAT VI: The Evolution of Extreme Ultraviolet Radiation Emitted from Early M Stars The Astrophysical Journal 895 (1): 5 [10.3847/1538-4357/ab893a]

Loyd, R. P., E. L. Shkolnik, A. C. Schneider, et al. T. Richey-Yowell, T. S. Barman, S. Peacock, and I. Pagano. 2020. Current Population Statistics Do Not Favor Photoevaporation over Core-powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap The Astrophysical Journal 890 (1): 23 [10.3847/1538-4357/ab6605]

Peacock, S., T. Barman, E. L. Shkolnik, et al. P. H. Hauschildt, E. Baron, and B. Fuhrmeister. 2019. Predicting the Extreme Ultraviolet Radiation Environment of Exoplanets around Low-mass Stars: GJ 832, GJ 176, and GJ 436 The Astrophysical Journal 886 (2): 77 [10.3847/1538-4357/ab4f6f]

Peacock, S., T. Barman, E. L. Shkolnik, P. H. Hauschildt, and E. Baron. 2019. Predicting the Extreme Ultraviolet Radiation Environment of Exoplanets around Low-mass Stars: The TRAPPIST-1 System The Astrophysical Journal 871 (2): 235 [10.3847/1538-4357/aaf891]

Loyd, R. P., E. L. Shkolnik, A. C. Schneider, et al. T. S. Barman, V. S. Meadows, I. Pagano, and S. Peacock. 2018. HAZMAT. IV. Flares and Superflares on Young M Stars in the Far Ultraviolet The Astrophysical Journal 867 (1): 70 [10.3847/1538-4357/aae2ae]

Martinez, A. O., I. J. Crossfield, J. E. Schlieder, et al. C. D. Dressing, C. Obermeier, J. Livingston, S. Ciceri, S. Peacock, C. A. Beichman, S.-E. L'epine, K. M. Aller, Q. A. Chance, E. A. Petigura, A. W. Howard, and M. W. Werner. 2017. Stellar and Planetary Parameters for K2textquoterights Late-type Dwarf Systems from C1 to C5 The Astrophysical Journal 837 (1): 72 [10.3847/1538-4357/aa56c7]

Jackson, B., P. Arras, K. Penev, S. Peacock, and P. Marchant. 2017. A New Model of Roche Lobe Overflow for Short-period Gaseous Planets and Binary Stars The Astrophysical Journal 835 (2): 145 [10.3847/1538-4357/835/2/145]

Jackson, B., E. Jensen, S. Peacock, P. Arras, and K. Penev. 2016. Tidal decay and stable Roche-lobe overflow of short-period gaseous exoplanets Celestial Mechanics and Dynamical Astronomy 126 (1-3): 227-248 [10.1007/s10569-016-9704-1]

Shkolnik, E. L., K. A. Rolph, S. Peacock, and T. S. Barman. 2014. Predicting Lyensuremathalpha and Mg II Fluxes from K and M Dwarfs Using Galaxy Evolution Explorer Ultraviolet Photometry Astrophysical Journal Letters 796 (1): L20 [10.1088/2041-8205/796/1/L20]