2026-09-22T09:34:24Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1525572023-11-01T03:37:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Seager, Sara
Mehrle, Nicholas
Massachusetts Institute of Technology. Department of Physics
2023-10-30T20:02:43Z
2023-10-30T20:02:43Z
2023-06
2023-10-25T18:00:10.499Z
https://hdl.handle.net/1721.1/152557
Modern exoplanet science has an observational bias towards short-period planets. Among other things, these planets tend to be highly irradiated, either thermally resulting in high equilibrium temperatures and/or through high energy FUV/Xray radiation. The resulting planets exhibit a diverse array of physical characteristics unlike those seen on Earth. I present a collection of works broadly encompassed by the theme of understanding highly irradiated planets and a set of new techniques I develop to further analysis of these strange worlds. First I discuss observations of Upsilon Andromedae b, a non-transiting planet I have observed the atmosphere of for the first time, and Venus, Earth’s twin sister that turned out so different. Each of these observations is enabled by a new method I introduce for that class of analyses. I then present my work on radiation-hydrodynamics simulations of atmospheres subject to intense high energy radiation, for which I have developed a new simulation code with a unique purpose.
Ph.D.
Massachusetts Institute of Technology
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https://rightsstatements.org/page/InC-EDU/1.0/
Resolving the Mysteries of Highly Irradiated Planets: Observations and Simulations
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Doctor of Philosophy
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<Abstract>Modern exoplanet science has an observational bias towards short-period planets. Among other things, these planets tend to be highly irradiated, either thermally resulting in high equilibrium temperatures and/or through high energy FUV/Xray radiation. The resulting planets exhibit a diverse array of physical characteristics unlike those seen on Earth. I present a collection of works broadly encompassed by the theme of understanding highly irradiated planets and a set of new techniques I develop to further analysis of these strange worlds. First I discuss observations of Upsilon Andromedae b, a non-transiting planet I have observed the atmosphere of for the first time, and Venus, Earth’s twin sister that turned out so different. Each of these observations is enabled by a new method I introduce for that class of analyses. I then present my work on radiation-hydrodynamics simulations of atmospheres subject to intense high energy radiation, for which I have developed a new simulation code with a unique purpose.</Abstract>
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