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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
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  
Open star clusters
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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■035    ▼a(MiAaPQ)AAI32171561
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■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.

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