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Bright and Early: The Role of Massive Galaxies in the Evolution of the z > 2 Universe
Bright and Early: The Role of Massive Galaxies in the Evolution of the z > 2 Universe
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091519.5
- ISBN
- 9798270229931
- DDC
- 519
- 서명/저자
- Bright and Early: The Role of Massive Galaxies in the Evolution of the <em>z</em> > 2 Universe / Olivia R Cooper
- 발행사항
- [Sl] : The University of Texas at Austin, 2025
- 형태사항
- 1 electronic resource (225 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
- 주기사항
- Advisors: Finkelstein, Steven L. Committee members: Gebhardt, Karl; Casey, Caitlin M.; Papovich, Casey; Muñoz, Julian.
- 학위논문주기
- - Ph.D. : The University of Texas at Austin, 2025.
- 초록/해제
- 요약The first few billion years of the Universe encompasses two major transitions driven by the formation and evolution of star-forming galaxies. On the early side at z6 is the Epoch of Reionization (EoR), the final cosmic phase change as some of the first stars and galaxies turned on and ionized the neutral gas surrounding them. Following this epoch, the Universe transitions from being dominated by cold gas and gas accretion to being dominated by stellar mass and gas depletion as ongoing star formation converts gas into stars; this era is bounded by the peak of cosmic star formation at z~2.5. In between, galaxies and large-scale structures are dramatically and seemingly rapidly evolving --- recent discoveries of extreme systems at redshifts higher than expected challenge our current models. To chart this rapid assembly, my dissertation is centered around three major projects that each aim to understand the role of massive galaxies in the evolving Universe using efficient selection techniques with observations spanning instruments and energy regimes.As part of the Web Epoch of Reionization Lyman-alpha Survey (WERLS), I spectroscopically target UV-bright EoR galaxies and collate a large sample of Lyman-alpha-emitters at z~7-8, and discover a potential ionized bubble embedded in the EoR. Through the Searching Far and Long (SFL) campaign, I constructed the largest sample of submillimeter-bright galaxies with Atacama Large Millimeter/submillimeter Array (ALMA) 2mm follow-up. I found a positive correlation between redshift and 2mm flux density, with the 2mm data point proving especially useful for high redshift sources at z3.5, improving redshift accuracy by nearly 2x. Additionally, I measured a steep Rayleigh-Jeans far-infrared slope for the sample, potentially indicating a difference in dust grain composition or size compared to local sources. Finally, using JWST spectra from the Red Unknowns: Bright Infrared Extragalactic Survey (RUBIES) jointly with ALMA data, I directly trace the star formation histories for a sample of dust-obscured galaxies, resolving new detail regarding the evolutionary phases of massive galaxies. Leveraging detections of multiple Balmer and Paschen lines, I also derive the first optical attenuation curve for submillimeter-selected galaxies, which potentially indicates smaller dust grains or differences in star-dust geometry. Each of these works is ultimately motivated by the science question: how does early assembly of massive star-forming galaxies affect the evolution of the Universe? With new and upcoming data from JWST, ALMA, and other world-class observatories, we are well-equipped to challenge our assumptions about how massive galaxies assemble, and resolve their evolution across time and space.
- 언어주기
- English
- 일반주제명
- Astrophysics
- 일반주제명
- Astronomy
- 일반주제명
- Theoretical physics
- 키워드
- Massive galaxies
- 키워드
- Data points
- 기타저자
- The University of Texas at Austin Astronomy
- 기본자료저록
- Dissertations Abstracts International. 87-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260311091519.5
■006m o d
■007cr|nu||||||||
■020 ▼a9798270229931
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a519
■1001 ▼aCooper, Olivia R.▼eauthor.
■24510▼aBright and Early: The Role of Massive Galaxies in the Evolution of the emz/em 2 Universe ▼cOlivia R Cooper
■260 ▼a[Sl]▼bThe University of Texas at Austin▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (225 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: B.
■500 ▼aAdvisors: Finkelstein, Steven L. Committee members: Gebhardt, Karl; Casey, Caitlin M.; Papovich, Casey; Muñoz, Julian.
■5021 ▼bPh.D.▼cThe University of Texas at Austin▼d2025.
■520 ▼aThe first few billion years of the Universe encompasses two major transitions driven by the formation and evolution of star-forming galaxies. On the early side at z6 is the Epoch of Reionization (EoR), the final cosmic phase change as some of the first stars and galaxies turned on and ionized the neutral gas surrounding them. Following this epoch, the Universe transitions from being dominated by cold gas and gas accretion to being dominated by stellar mass and gas depletion as ongoing star formation converts gas into stars; this era is bounded by the peak of cosmic star formation at z~2.5. In between, galaxies and large-scale structures are dramatically and seemingly rapidly evolving --- recent discoveries of extreme systems at redshifts higher than expected challenge our current models. To chart this rapid assembly, my dissertation is centered around three major projects that each aim to understand the role of massive galaxies in the evolving Universe using efficient selection techniques with observations spanning instruments and energy regimes.As part of the Web Epoch of Reionization Lyman-alpha Survey (WERLS), I spectroscopically target UV-bright EoR galaxies and collate a large sample of Lyman-alpha-emitters at z~7-8, and discover a potential ionized bubble embedded in the EoR. Through the Searching Far and Long (SFL) campaign, I constructed the largest sample of submillimeter-bright galaxies with Atacama Large Millimeter/submillimeter Array (ALMA) 2mm follow-up. I found a positive correlation between redshift and 2mm flux density, with the 2mm data point proving especially useful for high redshift sources at z3.5, improving redshift accuracy by nearly 2x. Additionally, I measured a steep Rayleigh-Jeans far-infrared slope for the sample, potentially indicating a difference in dust grain composition or size compared to local sources. Finally, using JWST spectra from the Red Unknowns: Bright Infrared Extragalactic Survey (RUBIES) jointly with ALMA data, I directly trace the star formation histories for a sample of dust-obscured galaxies, resolving new detail regarding the evolutionary phases of massive galaxies. Leveraging detections of multiple Balmer and Paschen lines, I also derive the first optical attenuation curve for submillimeter-selected galaxies, which potentially indicates smaller dust grains or differences in star-dust geometry. Each of these works is ultimately motivated by the science question: how does early assembly of massive star-forming galaxies affect the evolution of the Universe? With new and upcoming data from JWST, ALMA, and other world-class observatories, we are well-equipped to challenge our assumptions about how massive galaxies assemble, and resolve their evolution across time and space.
■546 ▼aEnglish
■590 ▼aSchool code: 0227
■650 4▼aAstrophysics
■650 4▼aAstronomy
■650 4▼aTheoretical physics
■653 ▼aStar-forming galaxies
■653 ▼aEpoch of Reionization
■653 ▼aMassive galaxies
■653 ▼aData points
■7102 ▼aThe University of Texas at Austin▼bAstronomy.▼edegree granting institution.
■7201 ▼aFinkelstein, Steven L.▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g87-06B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361158▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
