본문

서브메뉴

Optical Variability of Intermediate-Mass Black Holes as a Probe of Black Hole Accretion and Growth
Optical Variability of Intermediate-Mass Black Holes as a Probe of Black Hole Accretion an...
Optical Variability of Intermediate-Mass Black Holes as a Probe of Black Hole Accretion and Growth

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105418
ISBN  
9798291564172
DDC  
520
저자명  
Burke, Colin J.
서명/저자  
Optical Variability of Intermediate-Mass Black Holes as a Probe of Black Hole Accretion and Growth
발행사항  
[Sl] : University of Illinois at Urbana-Champaign, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
178 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Shen, Yue.
학위논문주기  
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2023.
초록/해제  
요약Active galactic nuclei (AGNs) in dwarf galaxies (dwarf AGNs) are believed to host accreting intermediate-mass black holes (IMBHs). The demographics of dwarf AGNs are an important tracer of supermassive black hole (SMBH) growth, because their relic IMBHs act as a fossil record of SMBH seeding pathways at high redshift. Being ubiquitous across wavelengths and timescales, AGN variability is useful for AGN identification and is an important probe of BH accretion. Because the physical timescales associated with BH accretion generally scale with the mass of the BH, dwarf AGNs with accreting IMBHs are new laboratories for studying BH accretion on human timescales. The first part of this dissertation is focused on observational evidence for a characteristic thermal timescale in accretion disks using optical light curves from stellar-mass accreting systems to SMBHs in AGNs. This is motivated by the ~ days timescale variability in the optical light curve of the dwarf AGN NGC 4395. These results are presented in Chapter 2. Chapter 3 focuses on identification of dwarf AGN from variability beyond z ~ 0.1 (the limit of what has been probed by previous work) using light curves from the Dark Energy Survey Supernova survey program. Chapter 4 presents a phenomenological forward model for forecasting dwarf AGNs and constraining the corresponding IMBH number density or occupation fraction with optical variability. Chapter 5 presents detailed spectroscopic tests of the AGN nature in a small sample of extremely metal-poor dwarf galaxies. Future test of BH-host galaxy co-evolution in the IMBH regime could help illuminate models of SMBH seeding and feedback in dwarf galaxies. Constraining the IMBH number density using these probes will be critical for forecasting the gravitational wave events with the upcoming Laser Interferometer Space Antenna (LISA) mission.
일반주제명  
Astronomy
일반주제명  
Astrophysics
일반주제명  
Optics
키워드  
Intermediate-mass black holes
키워드  
Active galactic nuclei
키워드  
Variability
키워드  
Dwarf galaxies
키워드  
Supermassive black hole
기타저자  
University of Illinois at Urbana-Champaign Astronomy
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2023        us                              c    eng  d
■001000017360281
■00520260202105418
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798291564172
■035    ▼a(MiAaPQ)AAI32271388
■035    ▼a(MiAaPQ)httphdlhandlenet2142121408
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a520
■1001  ▼aBurke,  Colin  J.
■24510▼aOptical  Variability  of  Intermediate-Mass  Black  Holes  as  a  Probe  of  Black  Hole  Accretion  and  Growth
■260    ▼a[Sl]▼bUniversity  of  Illinois  at  Urbana-Champaign▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a178  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Shen,  Yue.
■5021  ▼aThesis  (Ph.D.)--University  of  Illinois  at  Urbana-Champaign,  2023.
■520    ▼aActive  galactic  nuclei  (AGNs)  in  dwarf  galaxies  (dwarf  AGNs)  are  believed  to  host  accreting  intermediate-mass  black  holes  (IMBHs).  The  demographics  of  dwarf  AGNs  are  an  important  tracer  of  supermassive  black  hole  (SMBH)  growth,  because  their  relic  IMBHs  act  as  a  fossil  record  of  SMBH  seeding  pathways  at  high  redshift.  Being  ubiquitous  across  wavelengths  and  timescales,  AGN  variability  is  useful  for  AGN  identification  and  is  an  important  probe  of  BH  accretion.  Because  the  physical  timescales  associated  with  BH  accretion  generally  scale  with  the  mass  of  the  BH,  dwarf  AGNs  with  accreting  IMBHs  are  new  laboratories  for  studying  BH  accretion  on  human  timescales.  The  first  part  of  this  dissertation  is  focused  on  observational  evidence  for  a  characteristic  thermal  timescale  in  accretion  disks  using  optical  light  curves  from  stellar-mass  accreting  systems  to  SMBHs  in  AGNs.  This  is  motivated  by  the  ~  days  timescale  variability  in  the  optical  light  curve  of  the  dwarf  AGN  NGC  4395.  These  results  are  presented  in  Chapter  2.  Chapter  3  focuses  on  identification  of  dwarf  AGN  from  variability  beyond  z  ~  0.1  (the  limit  of  what  has  been  probed  by  previous  work)  using  light  curves  from  the  Dark  Energy  Survey  Supernova  survey  program.  Chapter  4  presents  a  phenomenological  forward  model  for  forecasting  dwarf  AGNs  and  constraining  the  corresponding  IMBH  number  density  or  occupation  fraction  with  optical  variability.  Chapter  5  presents  detailed  spectroscopic  tests  of  the  AGN  nature  in  a  small  sample  of  extremely  metal-poor  dwarf  galaxies.  Future  test  of  BH-host  galaxy  co-evolution  in  the  IMBH  regime  could  help  illuminate  models  of  SMBH  seeding  and  feedback  in  dwarf  galaxies.  Constraining  the  IMBH  number  density  using  these  probes  will  be  critical  for  forecasting  the  gravitational  wave  events  with  the  upcoming  Laser  Interferometer  Space  Antenna  (LISA)  mission.
■590    ▼aSchool  code:  0090.
■650  4▼aAstronomy
■650  4▼aAstrophysics
■650  4▼aOptics
■653    ▼aIntermediate-mass  black  holes
■653    ▼aActive  galactic  nuclei
■653    ▼aVariability
■653    ▼aDwarf  galaxies
■653    ▼aSupermassive  black  hole
■690    ▼a0606
■690    ▼a0752
■690    ▼a0596
■71020▼aUniversity  of  Illinois  at  Urbana-Champaign▼bAstronomy.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0090
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360281▼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
    TF18735 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.