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Tracing the Evolution of Planetary Systems from Young Worlds to Hot Jupiters
Tracing the Evolution of Planetary Systems from Young Worlds to Hot Jupiters
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104836
- ISBN
- 9798290945132
- DDC
- 520
- 저자명
- Sha, Lizhou.
- 서명/저자
- Tracing the Evolution of Planetary Systems from Young Worlds to Hot Jupiters
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 167 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Vanderburg, Andrew M.;Soares‐Furtado, Melinda M.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
- 초록/해제
- 요약In the past twenty years, we have come to understand that giant planets migrate from where they initially formed in the protoplanetary disk. Nevertheless, it remains difficult to distinguish between the various proposed migration theories even within the Solar System. My thesis aims to constrain planet migration through exoplanet demographics via two approaches. In the first approach, I conduct a search of nearby companion planets to hot jupiters through a systematic search of TESS light curves. The survival of nearby companions means that these hot jupiters are unlikely to have migrated to their present location via dynamically disruptive high‐eccentricity migration and should have undergone disk migration or formed in situ. My search yielded the TOI‐2000 system and recovered most known hot jupiter nearby companions, confirming that these systems are indeed intrinsically uncommon. This scarcity, together with the apparent trend that almost half of these systems have a grazing hot jupiter, is evidence in favor of high‐eccentricity migration being the dominant mechanism for forming hot jupiters. In the second approach, I focus on searching for young planets in nearby open clusters, which allow us to test hypotheses on their dynamical evolution and migration by comparison to more mature systems. Currently, the incompleteness of the local young star census is one of the major factors limiting our search for young planets. Gaia spatio‐kinematic data have made great improvements by revealing diffuse and extended structures known as tidal tails in nearby open clusters, but many of these structures lack independent verification. My pilot study used TESS data to measure stellar rotation periods in the 120 Myr-old nearby open cluster Blanco 1, and, by comparing the gyrochrone sequence of the core and tidal tail stars, provided the first independent confirmation of its tidal tails. The tidal tails more than double the membership of Blanco 1, pointing to a viable strategy to enhance the local young star census and broaden the search targets for young planets. Combining these two approaches will provide a valuable testbed for theories of planetary formation and evolution.
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Planetology
- 키워드
- Exoplanets
- 키워드
- Hot jupiters
- 키워드
- Planet formation
- 키워드
- Stellar rotation
- 기타저자
- The University of Wisconsin - Madison Astronomy
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104836
■006m o d
■007cr#unu||||||||
■020 ▼a9798290945132
■035 ▼a(MiAaPQ)AAI32171561
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a520
■1001 ▼aSha, Lizhou.
■24510▼aTracing the Evolution of Planetary Systems from Young Worlds to Hot Jupiters
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a167 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Vanderburg, Andrew M.;Soares‐Furtado, Melinda M.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
■520 ▼aIn the past twenty years, we have come to understand that giant planets migrate from where they initially formed in the protoplanetary disk. Nevertheless, it remains difficult to distinguish between the various proposed migration theories even within the Solar System. My thesis aims to constrain planet migration through exoplanet demographics via two approaches. In the first approach, I conduct a search of nearby companion planets to hot jupiters through a systematic search of TESS light curves. The survival of nearby companions means that these hot jupiters are unlikely to have migrated to their present location via dynamically disruptive high‐eccentricity migration and should have undergone disk migration or formed in situ. My search yielded the TOI‐2000 system and recovered most known hot jupiter nearby companions, confirming that these systems are indeed intrinsically uncommon. This scarcity, together with the apparent trend that almost half of these systems have a grazing hot jupiter, is evidence in favor of high‐eccentricity migration being the dominant mechanism for forming hot jupiters. In the second approach, I focus on searching for young planets in nearby open clusters, which allow us to test hypotheses on their dynamical evolution and migration by comparison to more mature systems. Currently, the incompleteness of the local young star census is one of the major factors limiting our search for young planets. Gaia spatio‐kinematic data have made great improvements by revealing diffuse and extended structures known as tidal tails in nearby open clusters, but many of these structures lack independent verification. My pilot study used TESS data to measure stellar rotation periods in the 120 Myr-old nearby open cluster Blanco 1, and, by comparing the gyrochrone sequence of the core and tidal tail stars, provided the first independent confirmation of its tidal tails. The tidal tails more than double the membership of Blanco 1, pointing to a viable strategy to enhance the local young star census and broaden the search targets for young planets. Combining these two approaches will provide a valuable testbed for theories of planetary formation and evolution.
■590 ▼aSchool code: 0262.
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aPlanetology
■653 ▼aExoplanets
■653 ▼aHot jupiters
■653 ▼aOpen star clusters
■653 ▼aPlanet formation
■653 ▼aStellar rotation
■690 ▼a0606
■690 ▼a0596
■690 ▼a0590
■71020▼aThe University of Wisconsin - Madison▼bAstronomy.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359111▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


