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Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond
Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103532
- ISBN
- 9798280712409
- DDC
- 520
- 서명/저자
- Enhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond
- 발행사항
- [Sl] : Harvard University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 220 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisor: Eisenstein, Daniel J.;Kovac, John M.
- 학위논문주기
- Thesis (Ph.D.)--Harvard University, 2025.
- 초록/해제
- 요약For many years, we have known that the Universe is vast and expands with acceleration on the largest scales. However, dark energy, the substance supposedly driving this acceleration, might also weaken with time. Or at least the current standard model of cosmology has a problem explaining all the highest-quality data available. We present one of the key technical ingredients that enabled the Dark Energy Spectroscopic Instrument (DESI) Baryon Acoustic Oscillation (BAO) distance measurements - the semi-analytic covariance matrices for the two-point correlation functions of point tracers. We then briefly discuss the cosmological implications of DESI BAO results, including the suggestion of dark energy. Then, we discuss a curious possibility of relieving the Hubble tension, the discrepancy in the expansion rate of the Universe today obtained directly from a Hubble diagram versus inferred indirectly from the CMB, without introducing fundamentally new physics. In the end, we explore a novel analysis technique combining galaxy redshift surveys with the data from the thermal Sunyaev-Zeldovich effect, a secondary anisotropy in the CMB. We aim to interpretably extract more valuable cosmological information from both than standard 2-point summary statistics allow. This would enable better consistency tests for the concordance model of cosmology and potentially new, exciting discoveries.
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Statistics
- 일반주제명
- Statistical physics
- 키워드
- Universe
- 기타저자
- Harvard University Astronomy
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103532
■006m o d
■007cr#unu||||||||
■020 ▼a9798280712409
■035 ▼a(MiAaPQ)AAI32040070
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a520
■1001 ▼aRashkovetskyi, Mykhailo.▼0(orcid)0000-0001-7144-2349
■24510▼aEnhancing the Analysis of the Large-Scale Structure of the Universe for Cutting-Edge Cosmological Surveys With Two-Point Correlation Function and Beyond
■260 ▼a[Sl]▼bHarvard University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a220 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisor: Eisenstein, Daniel J.;Kovac, John M.
■5021 ▼aThesis (Ph.D.)--Harvard University, 2025.
■520 ▼aFor many years, we have known that the Universe is vast and expands with acceleration on the largest scales. However, dark energy, the substance supposedly driving this acceleration, might also weaken with time. Or at least the current standard model of cosmology has a problem explaining all the highest-quality data available. We present one of the key technical ingredients that enabled the Dark Energy Spectroscopic Instrument (DESI) Baryon Acoustic Oscillation (BAO) distance measurements - the semi-analytic covariance matrices for the two-point correlation functions of point tracers. We then briefly discuss the cosmological implications of DESI BAO results, including the suggestion of dark energy. Then, we discuss a curious possibility of relieving the Hubble tension, the discrepancy in the expansion rate of the Universe today obtained directly from a Hubble diagram versus inferred indirectly from the CMB, without introducing fundamentally new physics. In the end, we explore a novel analysis technique combining galaxy redshift surveys with the data from the thermal Sunyaev-Zeldovich effect, a secondary anisotropy in the CMB. We aim to interpretably extract more valuable cosmological information from both than standard 2-point summary statistics allow. This would enable better consistency tests for the concordance model of cosmology and potentially new, exciting discoveries.
■590 ▼aSchool code: 0084.
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aStatistics
■650 4▼aStatistical physics
■653 ▼aBaryon acoustic oscillations
■653 ▼aCosmic microwave background
■653 ▼aCosmological parameters
■653 ▼aGalaxy clustering
■653 ▼aUniverse
■653 ▼aStatistical methods
■690 ▼a0606
■690 ▼a0596
■690 ▼a0463
■690 ▼a0217
■71020▼aHarvard University▼bAstronomy.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0084
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357581▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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