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Rocky Asteroids to Icy Worlds: 3D Thermophysical Modeling of Airless Bodies
Rocky Asteroids to Icy Worlds: 3D Thermophysical Modeling of Airless Bodies
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105305
- ISBN
- 9798273302044
- DDC
- 523.4
- 저자명
- Sorli, Kya C.
- 서명/저자
- Rocky Asteroids to Icy Worlds: 3D Thermophysical Modeling of Airless Bodies
- 발행사항
- [Sl] : University of Colorado at Boulder, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 226 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-07, Section: B.
- 주기사항
- Advisor: Hayne, Paul O.
- 학위논문주기
- Thesis (Ph.D.)--University of Colorado at Boulder, 2025.
- 초록/해제
- 요약Light and heat play a transformative role across the solar system. Airless bodies keep a record of the processes that have shaped them, and reading that record is key to understanding how they, and our solar system, have evolved. Thermal observations can be leveraged to elucidate a body's past. Thermophysical modeling is necessary to interpret these observations. Herein, I use an advanced 3D thermophysical model that I developed, which includes the effects of conduction, insolation, shadowing, geothermal heat flux, and self-heating through scattered infrared light and reflected light, to address open questions about the thermal environments of these bodies. In this thesis, I explore the thermal processes shaping surfaces and evolution of airless bodies beginning with near-Earth binary asteroids, before moving out to the potentially volatile-rich Main Belt asteroids and finally to the ocean world Europa. In Chapter 2, I develop a 3D thermophysical model for interacting binary asteroid systems, which includes eclipsing and mutual radiation exchange between the primary and secondary. This model is extremely adaptable, and can be applied to single bodies, surfaces, or to fully interacting binary systems. Using this model, I calculate surface temperatures for the 1996 FG3 binary system, a Janus mission target. Coupling this to a numerical model of the Binary-YORP effect, I provide the first comparison of the standard analytical BYORP magnitude against the value predicted by thermophysical modeling, including thermal inertia, eclipses and mutual radiation. I find that these effects can alter the magnitude of BYORP by several percent and could affect the long-term orbital evolution of these bodies. They should thus be considered when calculating BYORP. In Chapter 3, I move further away from the Sun, and apply the model to study the extent and stability of water ice in the Main Belt. I study eight representative Main Belt Asteroids, including the seven targets of the Emirates Mission to the Asteroids Belt and the water-ice hosting asteroid (24) Themis. I present temperature and thermal inertia sensitivity estimates of the EMA targets during their anticipated flybys, drawing conclusions about the material properties that EMA may be able to differentiate. I estimate the depth and extent of subsurface ice that may be stable over long-term timescales. In doing so, I conclude that buried ice could be widespread on Main Belt asteroids, and offer a potential explanation for conflicting water ice observations on (24) Themis. Finally, in Chapter 4, I investigate whether thermal segregation can produce observed low albedo lag on double ridges on Europa. Using the 3D and self-heating capabilities of the model, I estimate sublimation and sputtering rates alongside deposition from the water exosphere to study the surface mass balance in these ridges. My findings suggest that troughs can reach much higher temperatures than their surroundings, and can produce optically thick lag from the equator to the middle latitudes if the atmosphere is sufficiently tenuous. I use spectral modeling to produce maps of low-albedo lag distribution for varying exospheric density estimates, which can eventually be compared against data from Europa Clipper.
- 일반주제명
- Planetology
- 일반주제명
- Astronomy
- 일반주제명
- Geophysics
- 키워드
- Asteroids
- 키워드
- Astrodynamics
- 키워드
- Europa
- 키워드
- Small bodies
- 키워드
- Volatiles
- 기타저자
- University of Colorado at Boulder Astrophysical and Planetary Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-07B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105305
■006m o d
■007cr#unu||||||||
■020 ▼a9798273302044
■035 ▼a(MiAaPQ)AAI32283114
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523.4
■1001 ▼aSorli, Kya C.
■24510▼aRocky Asteroids to Icy Worlds: 3D Thermophysical Modeling of Airless Bodies
■260 ▼a[Sl]▼bUniversity of Colorado at Boulder▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a226 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-07, Section: B.
■500 ▼aAdvisor: Hayne, Paul O.
■5021 ▼aThesis (Ph.D.)--University of Colorado at Boulder, 2025.
■520 ▼aLight and heat play a transformative role across the solar system. Airless bodies keep a record of the processes that have shaped them, and reading that record is key to understanding how they, and our solar system, have evolved. Thermal observations can be leveraged to elucidate a body's past. Thermophysical modeling is necessary to interpret these observations. Herein, I use an advanced 3D thermophysical model that I developed, which includes the effects of conduction, insolation, shadowing, geothermal heat flux, and self-heating through scattered infrared light and reflected light, to address open questions about the thermal environments of these bodies. In this thesis, I explore the thermal processes shaping surfaces and evolution of airless bodies beginning with near-Earth binary asteroids, before moving out to the potentially volatile-rich Main Belt asteroids and finally to the ocean world Europa. In Chapter 2, I develop a 3D thermophysical model for interacting binary asteroid systems, which includes eclipsing and mutual radiation exchange between the primary and secondary. This model is extremely adaptable, and can be applied to single bodies, surfaces, or to fully interacting binary systems. Using this model, I calculate surface temperatures for the 1996 FG3 binary system, a Janus mission target. Coupling this to a numerical model of the Binary-YORP effect, I provide the first comparison of the standard analytical BYORP magnitude against the value predicted by thermophysical modeling, including thermal inertia, eclipses and mutual radiation. I find that these effects can alter the magnitude of BYORP by several percent and could affect the long-term orbital evolution of these bodies. They should thus be considered when calculating BYORP. In Chapter 3, I move further away from the Sun, and apply the model to study the extent and stability of water ice in the Main Belt. I study eight representative Main Belt Asteroids, including the seven targets of the Emirates Mission to the Asteroids Belt and the water-ice hosting asteroid (24) Themis. I present temperature and thermal inertia sensitivity estimates of the EMA targets during their anticipated flybys, drawing conclusions about the material properties that EMA may be able to differentiate. I estimate the depth and extent of subsurface ice that may be stable over long-term timescales. In doing so, I conclude that buried ice could be widespread on Main Belt asteroids, and offer a potential explanation for conflicting water ice observations on (24) Themis. Finally, in Chapter 4, I investigate whether thermal segregation can produce observed low albedo lag on double ridges on Europa. Using the 3D and self-heating capabilities of the model, I estimate sublimation and sputtering rates alongside deposition from the water exosphere to study the surface mass balance in these ridges. My findings suggest that troughs can reach much higher temperatures than their surroundings, and can produce optically thick lag from the equator to the middle latitudes if the atmosphere is sufficiently tenuous. I use spectral modeling to produce maps of low-albedo lag distribution for varying exospheric density estimates, which can eventually be compared against data from Europa Clipper.
■590 ▼aSchool code: 0051.
■650 4▼aPlanetology
■650 4▼aAstronomy
■650 4▼aGeophysics
■653 ▼aAsteroids
■653 ▼aAstrodynamics
■653 ▼aEuropa
■653 ▼aNumerical modeling
■653 ▼aSmall bodies
■653 ▼aVolatiles
■690 ▼a0590
■690 ▼a0606
■690 ▼a0373
■690 ▼a0467
■71020▼aUniversity of Colorado at Boulder▼bAstrophysical and Planetary Sciences.
■7730 ▼tDissertations Abstracts International▼g87-07B.
■790 ▼a0051
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360111▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


