서브메뉴
검색
Charting Cosmic Structure: Untangling Weak Lensing with Spectroscopy and Color
Charting Cosmic Structure: Untangling Weak Lensing with Spectroscopy and Color
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153051
- ISBN
- 9798346393481
- DDC
- 522.1
- 서명/저자
- Charting Cosmic Structure: Untangling Weak Lensing with Spectroscopy and Color
- 발행사항
- [Sl] : Stanford University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 205 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
- 주기사항
- Advisor: Gruen, Daniel;Roodman, Aaron.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2024.
- 초록/해제
- 요약The distortion of light from distant galaxies around foreground structure holds key cosmological information about the nature of dark matter and dark energy. Precision cosmological inference with weak gravitational lensing is now limited by systematics and not the statistics of galaxies we observe. This thesis probes three of the largest systematics in weak lensing: (1) obtaining accurate distances to galaxies with limited photometric data, photometric redshifts or photo-zs, (2) understanding how galaxy shapes intrinsically correlate with one another, intrinsic alignment (IA) and (3) estimating the response of a galaxy's shape to gravitational shear, or shear bias. This thesis discusses my work in understanding and mitigating these systematics within the Dark Energy Survey (DES) year 3 analysis. I further outline two optical spectroscopic redshift programs with the Dark Energy Spectroscopic Instrument (DESI) and the 4-metre Multi-Object Spectroscopic Telescope (4MOST) that work to inform the color-redshift relation for distant galaxies. Lastly, I describe the results of a new cosmic shear analysis with DES Y3 that selects on blue, star-forming galaxies to diminish the impact of uncertain intrinsic alignment - a choice that substantially reduces tensions with early-universe probes in the measured amplitude of the matter fluctuation spectrum, S8, and provides a promising avenue for next generation, Stage IV lensing surveys.
- 일반주제명
- Telescopes
- 일반주제명
- Dark matter
- 일반주제명
- Stars & galaxies
- 일반주제명
- Spacetime
- 일반주제명
- Neutrinos
- 일반주제명
- Theory of relativity
- 일반주제명
- Geometry
- 일반주제명
- Radiation
- 일반주제명
- Dark energy
- 일반주제명
- Universe
- 일반주제명
- Cosmology
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Atomic physics
- 일반주제명
- Optics
- 일반주제명
- Particle physics
- 일반주제명
- Theoretical physics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 86-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017164816
■00520250211153051
■006m o d
■007cr#unu||||||||
■020 ▼a9798346393481
■035 ▼a(MiAaPQ)AAI31643317
■035 ▼a(MiAaPQ)Stanfordgw828xb5995
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a522.1
■1001 ▼aMcCullough, Jamie Christine.
■24510▼aCharting Cosmic Structure: Untangling Weak Lensing with Spectroscopy and Color
■260 ▼a[Sl]▼bStanford University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a205 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-05, Section: B.
■500 ▼aAdvisor: Gruen, Daniel;Roodman, Aaron.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2024.
■520 ▼aThe distortion of light from distant galaxies around foreground structure holds key cosmological information about the nature of dark matter and dark energy. Precision cosmological inference with weak gravitational lensing is now limited by systematics and not the statistics of galaxies we observe. This thesis probes three of the largest systematics in weak lensing: (1) obtaining accurate distances to galaxies with limited photometric data, photometric redshifts or photo-zs, (2) understanding how galaxy shapes intrinsically correlate with one another, intrinsic alignment (IA) and (3) estimating the response of a galaxy's shape to gravitational shear, or shear bias. This thesis discusses my work in understanding and mitigating these systematics within the Dark Energy Survey (DES) year 3 analysis. I further outline two optical spectroscopic redshift programs with the Dark Energy Spectroscopic Instrument (DESI) and the 4-metre Multi-Object Spectroscopic Telescope (4MOST) that work to inform the color-redshift relation for distant galaxies. Lastly, I describe the results of a new cosmic shear analysis with DES Y3 that selects on blue, star-forming galaxies to diminish the impact of uncertain intrinsic alignment - a choice that substantially reduces tensions with early-universe probes in the measured amplitude of the matter fluctuation spectrum, S8, and provides a promising avenue for next generation, Stage IV lensing surveys.
■590 ▼aSchool code: 0212.
■650 4▼aTelescopes
■650 4▼aDark matter
■650 4▼aStars & galaxies
■650 4▼aSpacetime
■650 4▼aNeutrinos
■650 4▼aTheory of relativity
■650 4▼aGeometry
■650 4▼aRadiation
■650 4▼aDark energy
■650 4▼aUniverse
■650 4▼aCosmology
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aAtomic physics
■650 4▼aOptics
■650 4▼aParticle physics
■650 4▼aTheoretical physics
■690 ▼a0606
■690 ▼a0596
■690 ▼a0748
■690 ▼a0752
■690 ▼a0798
■690 ▼a0753
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g86-05B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164816▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
