본문

서브메뉴

An ''InCLOSE'' View of the Circumgalactic Medium of Z~2 Star-Forming Galaxies
An ''InCLOSE'' View of the Circumgalactic Medium of Z~2 Star-Forming Galaxies
An ''InCLOSE'' View of the Circumgalactic Medium of Z~2 Star-Forming Galaxies

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202104752
ISBN  
9798290653792
DDC  
523.80223
저자명  
Nunez-Cravin, Evan Haze.
서명/저자  
An InCLOSE View of the Circumgalactic Medium of Z~2 Star-Forming Galaxies
발행사항  
[Sl] : California Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
220 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
주기사항  
Advisor: Steidel, Chuck;Kirby, Evan.
학위논문주기  
Thesis (Ph.D.)--California Institute of Technology, 2025.
초록/해제  
요약This thesis focuses on using diffuse gas to investigate the galactic chemical evolution and circumgalactic medium of galaxies near the peak of cosmic star-formation rate density \uD835\uDC67 ∼ 2. There are many fundamental questions that remain unanswered about these processes due to the lack of large observational samples including what the typical yields of massive stars are, the interplay between diffuse circumgalactic and dense interstellar gas in terms of kinematic complexity, metal content, stellar mass, and star formation rate, and the evolution of circumgalactic gas over cosmic time. The common thread between each investigation is the use of QSO absorption line objects (QSO absorbers) to probe diffuse gas that otherwise would be unseen due to its diffusivity. The chemical evolution of galaxies requires accounting for all sources of nucleosynthesis. During the earliest stages of galactic chemical evolution, the metal yields from core-collapse supernovae (CCSNe) are very important but acquiring empirical constraints is difficult because they cannot be easily disentangled from objects that currently exist because they have been enriched by some fraction of CCSNe and late time nucleosynthetic processes e.g., Type Ia SN. To address this, I used the metal abundances of very-metal poor (VMP; [Fe/H] −2) Damped Lyman Alpha Absorbers (DLAs; QSO absorbers with high H I column density comparable to the interstellar medium, log (\uD835\uDC41HI/cm−2) 20.3) to place empirical constraints on the yields of low-metallicity CCSNe. I found that this approach is comparable to, and sometimes superior to, using abundances from the atmospheres of metal poor stars because of the model-independent nature of measuring abundances from dense, cold gas provided by the DLA. It has been known in the literature that DLAs and other QSO absorbers have a variety of origins so I began an observational campaign to find galaxies associated with QSO absorbers that would allow detailed analysis of the circumgalactic medium (CGM) of \uD835\uDC67 ∼ 2 galaxies. This has historically been challenging at all \uD835\uDC67, but especially at \uD835\uDC67 ∼ 2 where, before this thesis, there were only nine galaxies with their inner CGM analyzed (within a projected distance of 100 kpc) andwith characterized nebular emission and stellar population properties. To this end, I am leading a survey that builds on the Keck Baryonic Structure Survey (KBSS) that aims to find close-in galaxy-QSO pairs to directly connect the Inner CGM of QSO Line Of Sight Emitting (InCLOSE) galaxies with their ISM. KBSSInCLOSE relies on new observations that I have conducted using the twin Keck telescopes on Mauna Kea in Hawaii. I use the new optical integral field unit (rest-FUV at \uD835\uDC67 ∼ 2.3) called KCWI to discover new "InCLOSE" galaxies; obtain follow Keck/MOSFIRE near infrared (NIR) spectroscopy to confirm their redshifts and infer nebular properties including star-formation rate; use ground- and space-based optical and NIR images to infer stellar mass and age; and finally use high-resolution optical spectra of the KBSS QSOs to perform detailed analysis of CGM gas seen as absorption in the QSO spectra. The novelty of KBSS-InCLOSE goes beyond its large size (55 galaxies currently); the NIR spectra and images allow for the direct determination of galaxy properties, including stellar mass, which are rarely included in similar high-\uD835\uDC67surveys. The first results from KBSS-InCLOSE showcased the tools and techniques required to remove the bright QSOs from the datacubes, images, and spectra to reveal new faint, close-in galaxy-QSO pairs. Particular focus was payed on the processing of the IFU data because it serves as the main driving instrument for the survey since it provides both images and spectra of each galaxy in the field. By analyzing their CGM absorption, I showed that a \uD835\uDC40 = \uD835\uDC40∗ = 1010\uD835\uDC40⊙\uD835\uDC67 = 2.43 galaxy exhibited strong, multiphase, kinematically complex, and gravitationally unbound metals in its CGM. This has been seen before in previous studies and may suggest that a consensus picture of the CGM of \uD835\uDC67 ∼ 2.3, \uD835\uDC40∗ galaxies is emerging. In KBSS-InCLOSE II, I focused on the first low-mass galaxies examined in the sample. I showed that the galaxies were star-forming, at the same redshift, and had sizes and masses consistent with dwarf galaxies, and found preliminary insights into the low-mass CGM that would make it distinct from both the massive \uD835\uDC67 ∼ 2 CGM and low-mass local CGM suggesting that there may be strong evolution of the CGM across both stellar mass and redshift. In Chapter 5 I preview work that is yet to be completed, KBSS-InCLOSE III, where I examined the entire sample showing that the \uD835\uDC67 ∼ 2 CGM often shows strong of metal absorption, is likely clumpy, and multiphase, and that future IFU follow-up is necessary to find more galaxies, and NIR spectroscopic follow-up is necessary to secure redshifts to mitigate mismatches between galaxy's and absorbers.
일반주제명  
Stars & galaxies
일반주제명  
Kinematics
일반주제명  
Star & galaxy formation
일반주제명  
Supernovae
일반주제명  
Explosions
일반주제명  
Astronomy
기타저자  
California Institute of Technology Physics Mathematics and Astronomy
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017358788
■00520260202104752
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798290653792
■035    ▼a(MiAaPQ)AAI32151349
■035    ▼a(MiAaPQ)Caltech17287
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a523.80223
■1001  ▼aNunez-Cravin,  Evan  Haze.
■24513▼aAn  ''InCLOSE''  View  of  the  Circumgalactic  Medium  of  Z~2  Star-Forming  Galaxies
■260    ▼a[Sl]▼bCalifornia  Institute  of  Technology▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a220  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
■500    ▼aAdvisor:  Steidel,  Chuck;Kirby,  Evan.
■5021  ▼aThesis  (Ph.D.)--California  Institute  of  Technology,  2025.
■520    ▼aThis  thesis  focuses  on  using  diffuse  gas  to  investigate  the  galactic  chemical  evolution  and  circumgalactic  medium  of  galaxies  near  the  peak  of  cosmic  star-formation  rate  density  \uD835\uDC67  ∼  2.  There  are  many  fundamental  questions  that  remain  unanswered  about  these  processes  due  to  the  lack  of  large  observational  samples  including  what  the  typical  yields  of  massive  stars  are,  the  interplay  between  diffuse  circumgalactic  and  dense  interstellar  gas  in  terms  of  kinematic  complexity,  metal  content,  stellar  mass,  and  star  formation  rate,  and  the  evolution  of  circumgalactic  gas  over  cosmic  time.  The  common  thread  between  each  investigation  is  the  use  of  QSO  absorption  line  objects  (QSO  absorbers)  to  probe  diffuse  gas  that  otherwise  would  be  unseen  due  to  its  diffusivity.  The  chemical  evolution  of  galaxies  requires  accounting  for  all  sources  of  nucleosynthesis.  During  the  earliest  stages  of  galactic  chemical  evolution,  the  metal  yields  from  core-collapse  supernovae  (CCSNe)  are  very  important  but  acquiring  empirical  constraints  is  difficult  because  they  cannot  be  easily  disentangled  from  objects  that  currently  exist  because  they  have  been  enriched  by  some  fraction  of  CCSNe  and  late  time  nucleosynthetic  processes  e.g.,  Type  Ia  SN.  To  address  this,  I  used  the  metal  abundances  of  very-metal  poor  (VMP;  [Fe/H]    −2)  Damped  Lyman  Alpha  Absorbers  (DLAs;  QSO  absorbers  with  high  H  I  column  density  comparable  to  the  interstellar  medium,  log  (\uD835\uDC41HI/cm−2)    20.3)  to  place  empirical  constraints  on  the  yields  of  low-metallicity  CCSNe.  I  found  that  this  approach  is  comparable  to,  and  sometimes  superior  to,  using  abundances  from  the  atmospheres  of  metal  poor  stars  because  of  the  model-independent  nature  of  measuring  abundances  from  dense,  cold  gas  provided  by  the  DLA.  It  has  been  known  in  the  literature  that  DLAs  and  other  QSO  absorbers  have  a  variety  of  origins  so  I  began  an  observational  campaign  to  find  galaxies  associated  with  QSO  absorbers  that  would  allow  detailed  analysis  of  the  circumgalactic  medium  (CGM)  of  \uD835\uDC67  ∼  2  galaxies.  This  has  historically  been  challenging  at  all  \uD835\uDC67,  but  especially  at  \uD835\uDC67  ∼  2  where,  before  this  thesis,  there  were  only  nine  galaxies  with  their  inner  CGM  analyzed  (within  a  projected  distance  of  100  kpc)  andwith  characterized  nebular  emission  and  stellar  population  properties.  To  this  end,  I  am  leading  a  survey  that  builds  on  the  Keck  Baryonic  Structure  Survey  (KBSS)  that  aims  to  find  close-in  galaxy-QSO  pairs  to  directly  connect  the  Inner  CGM  of  QSO  Line  Of  Sight  Emitting  (InCLOSE)  galaxies  with  their  ISM.  KBSSInCLOSE  relies  on  new  observations  that  I  have  conducted  using  the  twin  Keck  telescopes  on  Mauna  Kea  in  Hawaii.  I  use  the  new  optical  integral  field  unit  (rest-FUV  at  \uD835\uDC67  ∼  2.3)  called  KCWI  to  discover  new  "InCLOSE"  galaxies;  obtain  follow  Keck/MOSFIRE  near  infrared  (NIR)  spectroscopy  to  confirm  their  redshifts  and  infer  nebular  properties  including  star-formation  rate;  use  ground-  and  space-based  optical  and  NIR  images  to  infer  stellar  mass  and  age;  and  finally  use  high-resolution  optical  spectra  of  the  KBSS  QSOs  to  perform  detailed  analysis  of  CGM  gas  seen  as  absorption  in  the  QSO  spectra.  The  novelty  of  KBSS-InCLOSE  goes  beyond  its  large  size  (55  galaxies  currently);  the  NIR  spectra  and  images  allow  for  the  direct  determination  of  galaxy  properties,  including  stellar  mass,  which  are  rarely  included  in  similar  high-\uD835\uDC67surveys.  The  first  results  from  KBSS-InCLOSE  showcased  the  tools  and  techniques  required  to  remove  the  bright  QSOs  from  the  datacubes,  images,  and  spectra  to  reveal  new  faint,  close-in  galaxy-QSO  pairs.  Particular  focus  was  payed  on  the  processing  of  the  IFU  data  because  it  serves  as  the  main  driving  instrument  for  the  survey  since  it  provides  both  images  and  spectra  of  each  galaxy  in  the  field.  By  analyzing  their  CGM  absorption,  I  showed  that  a  \uD835\uDC40  =  \uD835\uDC40∗  =  1010\uD835\uDC40⊙\uD835\uDC67  =  2.43  galaxy  exhibited  strong,  multiphase,  kinematically  complex,  and  gravitationally  unbound  metals  in  its  CGM.  This  has  been  seen  before  in  previous  studies  and  may  suggest  that  a  consensus  picture  of  the  CGM  of  \uD835\uDC67  ∼  2.3,  \uD835\uDC40∗  galaxies  is  emerging.  In  KBSS-InCLOSE  II,  I  focused  on  the  first  low-mass  galaxies  examined  in  the  sample.  I  showed  that  the  galaxies  were  star-forming,  at  the  same  redshift,  and  had  sizes  and  masses  consistent  with  dwarf  galaxies,  and  found  preliminary  insights  into  the  low-mass  CGM  that  would  make  it  distinct  from  both  the  massive  \uD835\uDC67  ∼  2  CGM  and  low-mass  local  CGM  suggesting  that  there  may  be  strong  evolution  of  the  CGM  across  both  stellar  mass  and  redshift.  In  Chapter  5  I  preview  work  that  is  yet  to  be  completed,  KBSS-InCLOSE  III,  where  I  examined  the  entire  sample  showing  that  the  \uD835\uDC67  ∼  2  CGM  often  shows  strong  of  metal  absorption,  is  likely  clumpy,  and  multiphase,  and  that  future  IFU  follow-up  is  necessary  to  find  more  galaxies,  and  NIR  spectroscopic  follow-up  is  necessary  to  secure  redshifts  to  mitigate  mismatches  between  galaxy's  and  absorbers.
■590    ▼aSchool  code:  0037.
■650  4▼aStars  &  galaxies
■650  4▼aKinematics
■650  4▼aStar  &  galaxy  formation
■650  4▼aSupernovae
■650  4▼aExplosions
■650  4▼aAstronomy
■690    ▼a0606
■71020▼aCalifornia  Institute  of  Technology▼bPhysics,  Mathematics  and  Astronomy.
■7730  ▼tDissertations  Abstracts  International▼g87-04B.
■790    ▼a0037
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358788▼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
    TF19412 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.