자료유형  

 학위논문

Control Number  

0017164544

International Standard Book Number  

9798384045748

Dewey Decimal Classification Number  

523

Main Entry-Personal Name  

Malsky, Isaac.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of Michigan., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

241 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

General Note  

Advisor: Rauscher, Emily.

Dissertation Note  

Thesis (Ph.D.)--University of Michigan, 2024.

Summary, Etc.  

요약Although thousands of exoplanets have been discovered, a relatively rare class of planets known as hot Jupiters has historically been critical to the advancement of the field. Hot Jupiters---massive gaseous planets with orbital semi-major axes less than ~0.05 au---are among the brightest and best candidates for atmospheric characterization. They are expected to be tidally locked, with constant day sides and constant night sides. Extreme temperature gradients drive supersonic winds, chemically diverse clouds form and dissipate in homogeneously, and hazes may blanket their atmospheres.In tandem with observations, simulations are critical to interpreting measurements, breaking degeneracies between different atmospheric physical and chemical structures, and showing how physical processes influence atmospheric circulation. The most comprehensive physics-driven models simulate full atmospheres and self-consistently show the resulting 3D chemical and physical structures. These models, known as General Circulation Models (GCMs), simulate radiative transfer, fluid dynamics, and other phenomena in planetary atmospheres.This thesis focuses on using numerical methods to characterize exoplanet atmospheres and expanding the physics within a GCM. Background to the field and an overview of GCMs is given in Chapter 1. In Chapter 2, I characterize how clouds and non-edge-on inclinations manifest in hot Jupiter emission spectra. In Chapter 3, I show that multiwavelength radiative transfer and clouds increase day-night temperature differences in hot Jupiters and result in non-isothermal upper atmospheres. In Chapter 4, I quantify how clouds and multiwavelength radiative transfer affect emission spectra and benchmark these differences against a new analysis of Spitzer phase curves of two canonical hot Jupiters. In Chapter 5, I model a warm Neptune with clouds and hazes to characterize the first ever JWST thermal phase curve. Finally, in Chapter 6 I conclude with a discussion of the future direction of the field of exoplanet atmospheric modeling. Additionally, I include two supplementary works that were completed concurrently with the above research on the helium enhancement of sub-Neptune mass atmospheres through fractionated mass loss.

Subject Added Entry-Topical Term  

Astrophysics.

Subject Added Entry-Topical Term  

Astronomy.

Subject Added Entry-Topical Term  

Planetology.

Index Term-Uncontrolled  

Exoplanet atmospheres

Index Term-Uncontrolled  

General Circulation Models

Index Term-Uncontrolled  

Emission spectra

Index Term-Uncontrolled  

Jupiter

Index Term-Uncontrolled  

Neptune

Added Entry-Corporate Name  

University of Michigan Astronomy and Astrophysics

Host Item Entry  

Dissertations Abstracts International. 86-03B.

Electronic Location and Access  

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Control Number  

joongbu:656812