| LDR | | 00000nam u2200205 4500 |
| 001 | | 000000435172 |
| 005 | | 20200227162143 |
| 008 | | 200131s2019 ||||||||||||||||| ||eng d |
| 020 | |
▼a 9781687999894 |
| 035 | |
▼a (MiAaPQ)AAI27614388 |
| 035 | |
▼a (MiAaPQ)umichrackham002407 |
| 040 | |
▼a MiAaPQ
▼c MiAaPQ
▼d 247004 |
| 082 | 0 |
▼a 523 |
| 100 | 1 |
▼a May, Erin M. |
| 245 | 10 |
▼a On the Atmospheres of the Smallest Gas Exoplanets. |
| 260 | |
▼a [S.l.]:
▼b University of Michigan.,
▼c 2019. |
| 260 | 1 |
▼a Ann Arbor:
▼b ProQuest Dissertations & Theses,
▼c 2019. |
| 300 | |
▼a 173 p. |
| 500 | |
▼a Source: Dissertations Abstracts International, Volume: 81-06, Section: B. |
| 500 | |
▼a Advisor: Rauscher, Emily. |
| 502 | 1 |
▼a Thesis (Ph.D.)--University of Michigan, 2019. |
| 506 | |
▼a This item must not be sold to any third party vendors. |
| 506 | |
▼a This item must not be added to any third party search indexes. |
| 520 | |
▼a With nearly 4000 unique exoplanets detected to-date, the field of exoplanet characterization has numerous questions to answer about these diverse planets and plenty of targets to observe as we work to understand the population of exoplanets as a whole, and where Earth fits in. In particular, planets larger than Earth but smaller than Neptune (3.88 Rearth, Where Rearth refers to the radius of Earth) are the most common exoplanet detected, yet we lack a direct comparison in our Solar System to study and extrapolate from. Because there must be some point at which exoplanets transition from having a higher likelihood of being terrestrial (thin gaseous envelope compared to the total radius) to having a higher likelihood of being gaseous (large gaseous envelope compared to the total radius), this size-regime has been dubbed the `transition regime'. With this in mind, in this dissertation, I outline the most prominent current detection methods and how the information we gain from them, specifically mass and radius, informs our understanding of detected exoplanets both within and outside the transition regime. I further discuss how these parameters alone are not enough to classify planets as terrestrial or gaseous within the transition regime due to degeneracies in inferred composition from mass-radius relations. In this dissertation I take a two-pronged approach to work towards a better understanding of the classification of these transition planets through both direct observations and theory. First, in Chapters II and III I present my work to directly measure the compositions of the smallest observable gas planets using ground-based transmission spectroscopy. This technique, while not immediately probing the transition regime, is a step towards small-planet characterization as instrumentation and observational techniques improve. In Chapter IV I use a three-dimensional general circulation model to study the influence of solid surfaces on atmospheric circulation for transition regime planets and study how the surface imprints itself on the emitted and reflected light from the exoplanet with an eye toward observing these differences. In Chapter V, I further explore the atmospheres of small, Neptune-sized planets in circumbinary orbits with time varying incident flux patterns due to their orbits around their pair of host stars to explore how this environment impacts the circulation. Together, these approaches are unique, yet complementary, in their contribution towards understanding the population of exoplanets as a whole. |
| 590 | |
▼a School code: 0127. |
| 650 | 4 |
▼a Astrophysics. |
| 650 | 4 |
▼a Astronomy. |
| 650 | 4 |
▼a Planetology. |
| 690 | |
▼a 0606 |
| 690 | |
▼a 0596 |
| 690 | |
▼a 0590 |
| 710 | 20 |
▼a University of Michigan.
▼b Astronomy and Astrophysics. |
| 773 | 0 |
▼t Dissertations Abstracts International
▼g 81-06B. |
| 773 | |
▼t Dissertation Abstract International |
| 790 | |
▼a 0127 |
| 791 | |
▼a Ph.D. |
| 792 | |
▼a 2019 |
| 793 | |
▼a English |
| 856 | 40 |
▼u http://www.riss.kr/pdu/ddodLink.do?id=T15494601
▼n KERIS
▼z 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
| 980 | |
▼a 202002
▼f 2020 |
| 990 | |
▼a ***1008102 |
| 991 | |
▼a E-BOOK |