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Precision Shear Calibration for Cosmology with Current and Future Galaxy Surveys
Precision Shear Calibration for Cosmology with Current and Future Galaxy Surveys
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105622
- ISBN
- 9798265428585
- DDC
- 523.01
- 서명/저자
- Precision Shear Calibration for Cosmology with Current and Future Galaxy Surveys
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 197 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Burchat, Patricia.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약Weak lensing, amongst the most sensitive probes of dark matter and dark energy, is a premier measurement for galaxy surveys including the Dark Energy Survey (DES) and the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST). As the statistical power of such surveys continues to improve, the requirements on understanding and minimizing the systematic uncertainties in cosmic shear measurement and calibration become ever more stringent. Therefore, developing measurement algorithms and calibrations for cosmic shear is critical to achieving precise and unbiased constraints on cosmological parameters.In this thesis, I review weak lensing, cosmic shear, and the development of both measurement and calibration techniques. I present the image simulations and shear calibration for the DES six-year cosmic shear dataset, demonstrating excellent control of systematic uncertainties for more than 150,000,000 galaxies spanning 4,422 square degrees of the southern sky. The simulations and calibration correct for the dominant sources of shear bias, including the effects of source detection, star-galaxy confusion, object and area masking, chromatic point-spread functions, and blending between galaxies of different redshifts. I describe studies of the effect of chromatic point-spread functions on shear calibration including the use of image simulations to quantify the resulting systematic uncertainty and the derivation of a method to calibrate this bias for future surveys such as LSST. Finally, I demonstrate the use of observations of the Milky Way satellite galaxy population to infer constraints on a model of decaying dark matter.
- 일반주제명
- Dark matter
- 일반주제명
- Stars & galaxies
- 일반주제명
- Spacetime
- 일반주제명
- Theory of relativity
- 일반주제명
- Satellites
- 일반주제명
- 20th century
- 일반주제명
- Radiation
- 일반주제명
- Dark energy
- 일반주제명
- Universe
- 일반주제명
- Cosmology
- 일반주제명
- Aerospace engineering
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Theoretical physics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017360805
■00520260202105622
■006m o d
■007cr#unu||||||||
■020 ▼a9798265428585
■035 ▼a(MiAaPQ)AAI32316513
■035 ▼a(MiAaPQ)Stanfordmd622jp3123
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523.01
■1001 ▼aMau, Sidney David.
■24510▼aPrecision Shear Calibration for Cosmology with Current and Future Galaxy Surveys
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a197 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Burchat, Patricia.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aWeak lensing, amongst the most sensitive probes of dark matter and dark energy, is a premier measurement for galaxy surveys including the Dark Energy Survey (DES) and the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST). As the statistical power of such surveys continues to improve, the requirements on understanding and minimizing the systematic uncertainties in cosmic shear measurement and calibration become ever more stringent. Therefore, developing measurement algorithms and calibrations for cosmic shear is critical to achieving precise and unbiased constraints on cosmological parameters.In this thesis, I review weak lensing, cosmic shear, and the development of both measurement and calibration techniques. I present the image simulations and shear calibration for the DES six-year cosmic shear dataset, demonstrating excellent control of systematic uncertainties for more than 150,000,000 galaxies spanning 4,422 square degrees of the southern sky. The simulations and calibration correct for the dominant sources of shear bias, including the effects of source detection, star-galaxy confusion, object and area masking, chromatic point-spread functions, and blending between galaxies of different redshifts. I describe studies of the effect of chromatic point-spread functions on shear calibration including the use of image simulations to quantify the resulting systematic uncertainty and the derivation of a method to calibrate this bias for future surveys such as LSST. Finally, I demonstrate the use of observations of the Milky Way satellite galaxy population to infer constraints on a model of decaying dark matter.
■590 ▼aSchool code: 0212.
■650 4▼aDark matter
■650 4▼aStars & galaxies
■650 4▼aSpacetime
■650 4▼aTheory of relativity
■650 4▼aSatellites
■650 4▼a20th century
■650 4▼aRadiation
■650 4▼aDark energy
■650 4▼aUniverse
■650 4▼aCosmology
■650 4▼aAerospace engineering
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aTheoretical physics
■690 ▼a0538
■690 ▼a0606
■690 ▼a0596
■690 ▼a0753
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360805▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


