본문

서브메뉴

Hubble Constant and Strong Gravitational Lensing
Hubble Constant and Strong Gravitational Lensing
Hubble Constant and Strong Gravitational Lensing

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105150
ISBN  
9798293831005
DDC  
523
저자명  
Schmidt, Thomas.
서명/저자  
Hubble Constant and Strong Gravitational Lensing
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
269 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Treu, Tommaso L.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약The persistent tension between early and late universe measurements of the Hubble constant (H0) represents one of the most significant challenges in modern cosmology, with implications for our understanding of fundamental physics. Strong gravitational lensing of variablesources offers a unique pathway to independent H0 measurements that bypass systematic uncertainties inherent in traditional methods that rely on the distance ladder. However, high-precision strong lens modeling has been computationally expensive and is further limited by extensive human resources required, thus creating bottlenecks for exploiting the wealth of strong lens discoveries expected from current and upcoming surveys.This dissertation presents advances in strong gravitational lensing that address these challenges while demonstrating the extraordinary potential of complex lensing configurations for high-precision cosmography. I develop and implement an automated modeling pipeline that drastically reduces computational time and investigator input requirements for cosmography-grade lens modeling. Applied to a sample of 31 quadruply imaged quasar systems, observed with the Hubble Space Telescope, this automated approach successfully produces models for 30/31 systems using 100 CPU hours and minimal human intervention per system, representing significant improvement over traditional methods typically requiring 105−6 CPU hours and one ore more years of investigator time.Complementing this large-scale development in methodology, I present comprehensive analyses of J1721+8842, an extraordinary strong lens system that exemplifies nature's capacity to provide precision laboratories. Initially modeled as an unprecedented dual AGN configuration, subsequent time-delay measurements and James Webb Space Telescope spectroscopic observations reveal J1721+8842 to be the first confirmed Einstein zigzag lens, a single quasar lensed into six images by compound deflection from two nearly perfectly aligned deflectors at redshifts z1 = 0.184 and z2 = 1.885. This remarkable geometry enables percent-level precision in time-delay predictions and provides up to 15 potential time-delay measurements compared to the 6 typically available from quadruply lensed systems, thereby dramatically enhancing both statistical precision and systematic error control.The work presented in this thesis demonstrates that uniform cosmography-grade modeling of large strong lens samples is achievable through automation, while exceptional individual systems can achieve percent-level precision in H0 measurements. These advances provide the technical foundation necessary to transform strong gravitational lensing from a specialized technique into a cornerstone for high-precision cosmology, capable of providing independent constraints necessary to resolve the Hubble tension and advancing our understanding of cosmic evolution.
일반주제명  
Astrophysics
일반주제명  
Astronomy
일반주제명  
Optics
키워드  
Hubble constant
키워드  
Strong gravitational lensing
키워드  
Cosmology
키워드  
Quadruply lensed quasar
키워드  
Cosmic evolution
기타저자  
University of California, Los Angeles Astronomy and Astrophysics 00EB
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017359636
■00520260202105150
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798293831005
■035    ▼a(MiAaPQ)AAI32242046
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a523
■1001  ▼aSchmidt,  Thomas.
■24510▼aHubble  Constant  and  Strong  Gravitational  Lensing
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a269  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Treu,  Tommaso  L.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aThe  persistent  tension  between  early  and  late  universe  measurements  of  the  Hubble  constant  (H0)  represents  one  of  the  most  significant  challenges  in  modern  cosmology,  with  implications  for  our  understanding  of  fundamental  physics.  Strong  gravitational  lensing  of  variablesources  offers  a  unique  pathway  to  independent  H0  measurements  that  bypass  systematic  uncertainties  inherent  in  traditional  methods  that  rely  on  the  distance  ladder.  However,  high-precision  strong  lens  modeling  has  been  computationally  expensive  and  is  further  limited  by  extensive  human  resources  required,  thus  creating  bottlenecks  for  exploiting  the  wealth  of  strong  lens  discoveries  expected  from  current  and  upcoming  surveys.This  dissertation  presents  advances  in  strong  gravitational  lensing  that  address  these  challenges  while  demonstrating  the  extraordinary  potential  of  complex  lensing  configurations  for  high-precision  cosmography.  I  develop  and  implement  an  automated  modeling  pipeline  that  drastically  reduces  computational  time  and  investigator  input  requirements  for  cosmography-grade  lens  modeling.  Applied  to  a  sample  of  31  quadruply  imaged  quasar  systems,  observed  with  the  Hubble  Space  Telescope,  this  automated  approach  successfully  produces  models  for  30/31  systems  using  100  CPU  hours  and  minimal  human  intervention  per  system,  representing  significant  improvement  over  traditional  methods  typically  requiring  105−6  CPU  hours  and  one  ore  more  years  of  investigator  time.Complementing  this  large-scale  development  in  methodology,  I  present  comprehensive  analyses  of  J1721+8842,  an  extraordinary  strong  lens  system  that  exemplifies  nature's  capacity  to  provide  precision  laboratories.  Initially  modeled  as  an  unprecedented  dual  AGN  configuration,  subsequent  time-delay  measurements  and  James  Webb  Space  Telescope  spectroscopic  observations  reveal  J1721+8842  to  be  the  first  confirmed  Einstein  zigzag  lens,  a  single  quasar  lensed  into  six  images  by  compound  deflection  from  two  nearly  perfectly  aligned  deflectors  at  redshifts  z1  =  0.184  and  z2  =  1.885.  This  remarkable  geometry  enables  percent-level  precision  in  time-delay  predictions  and  provides  up  to  15  potential  time-delay  measurements  compared  to  the  6  typically  available  from  quadruply  lensed  systems,  thereby  dramatically  enhancing  both  statistical  precision  and  systematic  error  control.The  work  presented  in  this  thesis  demonstrates  that  uniform  cosmography-grade  modeling  of  large  strong  lens  samples  is  achievable  through  automation,  while  exceptional  individual  systems  can  achieve  percent-level  precision  in  H0  measurements.  These  advances  provide  the  technical  foundation  necessary  to  transform  strong  gravitational  lensing  from  a  specialized  technique  into  a  cornerstone  for  high-precision  cosmology,  capable  of  providing  independent  constraints  necessary  to  resolve  the  Hubble  tension  and  advancing  our  understanding  of  cosmic  evolution.
■590    ▼aSchool  code:  0031.
■650  4▼aAstrophysics
■650  4▼aAstronomy
■650  4▼aOptics
■653    ▼aHubble  constant
■653    ▼aStrong  gravitational  lensing
■653    ▼aCosmology
■653    ▼aQuadruply  lensed  quasar
■653    ▼aCosmic  evolution
■690    ▼a0596
■690    ▼a0752
■690    ▼a0606
■71020▼aUniversity  of  California,  Los  Angeles▼bAstronomy  and  Astrophysics  00EB.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359636▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    Подробнее информация.

    • Бронирование
    • не существует
    • моя папка
    • Первый запрос зрения
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    материал
    Reg No. Количество платежных Местоположение статус Ленд информации
    TF19098 전자도서 대출가능 My Folder 부재도서신고 비도서대출신청 야간 도서대출신청

    * Бронирование доступны в заимствований книги. Чтобы сделать предварительный заказ, пожалуйста, нажмите кнопку бронирование

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.