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Analysis of Cosmic Microwave Background Temperature and E-Mode Polarization Anisotropies With 2019 and 2020 Data From the South Pole Telescope
Analysis of Cosmic Microwave Background Temperature and E-Mode Polarization Anisotropies With 2019 and 2020 Data From the South Pole Telescope
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211150912
- ISBN
- 9798382782133
- DDC
- 523
- 저자명
- Quan, Wei.
- 서명/저자
- Analysis of Cosmic Microwave Background Temperature and E-Mode Polarization Anisotropies With 2019 and 2020 Data From the South Pole Telescope
- 발행사항
- [Sl] : The University of Chicago, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 131 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Carlstrom, John;Crawford, Tom.
- 학위논문주기
- Thesis (Ph.D.)--The University of Chicago, 2024.
- 초록/해제
- 요약The angular power spectra of the three types of two-point correlation functions obtained from the cosmic microwave background (CMB) temperature and E-mode polarization anisotropies (the TT/TE/EE spectra) encode information on the composition and evolution of the universe. Measurements of the spectra contributed to establishing the ΛCDM cosmological model as the standard, and the satellite experiment Planck achieved subpercent-precision constraints on parameters of ΛCDM by mainly using its TT/TE spectra at large angular scales.However, there are also challenges to ΛCDM, a major one being the Hubble tension. Better measurements of the T E/EE spectra at small angular scales by other experiments like the South Pole Telescope (SPT) can serve as a powerful consistency test of Planck 's results and provide new insights on the tension. Since 2019, we have been taking data consistently with SPT-3G, the third-generation imaging instrument installed on the telescope in 2017.My thesis project is about analyzing data from 2019 and 2020 to substantially improve SPT-3G's existing measurements of the TE/EE spectra and constraints on cosmological parameters based on data from 2018 and to prepare for a future analysis based on the full dataset from SPT-3G. The analysis comprises three major steps: making CMB anisotropy maps from time series recorded by detectors, calculating the TT/TE/EE spectra from the maps, and fitting cosmological models to the spectra. As of the writing of this thesis in February 2024, we have produced maps and spectra and are working on constraining cosmological models. Uncertainties in the TE/EE spectra obtained from this new dataset are smaller than those from the 2018 dataset by an order of magnitude at small angular scales, and we are excited to significantly improve our existing constraints on cosmological parameters such as the Hubble constant.This thesis comprises four chapters. In chapter 1, I will discuss the origin of the three types of spectra, current measurements of the spectra and constraints on ΛCDM parameters, and future directions in the field. After that, I will introduce SPT-3G in chapter 2 by discussing important properties of the instrument and showing example raw data. Then, in chapter 3, I will discuss the dataset used in the analysis and methods involved in each major step of the analysis, In the final chapter, chapter 4, I will discuss further details of some of the methods and report results from them, show our maps and spectra, and discuss tasks that remain to be done.
- 일반주제명
- Astrophysics
- 일반주제명
- Physics
- 일반주제명
- Astronomy
- 키워드
- Data analysis
- 키워드
- Power spectra
- 키워드
- Temperature
- 기타저자
- The University of Chicago Physics
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211150912
■006m o d
■007cr#unu||||||||
■020 ▼a9798382782133
■035 ▼a(MiAaPQ)AAI30689923
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aQuan, Wei.▼0(orcid)0009-0002-2589-5501
■24510▼aAnalysis of Cosmic Microwave Background Temperature and E-Mode Polarization Anisotropies With 2019 and 2020 Data From the South Pole Telescope
■260 ▼a[Sl]▼bThe University of Chicago▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a131 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Carlstrom, John;Crawford, Tom.
■5021 ▼aThesis (Ph.D.)--The University of Chicago, 2024.
■520 ▼aThe angular power spectra of the three types of two-point correlation functions obtained from the cosmic microwave background (CMB) temperature and E-mode polarization anisotropies (the TT/TE/EE spectra) encode information on the composition and evolution of the universe. Measurements of the spectra contributed to establishing the ΛCDM cosmological model as the standard, and the satellite experiment Planck achieved subpercent-precision constraints on parameters of ΛCDM by mainly using its TT/TE spectra at large angular scales.However, there are also challenges to ΛCDM, a major one being the Hubble tension. Better measurements of the T E/EE spectra at small angular scales by other experiments like the South Pole Telescope (SPT) can serve as a powerful consistency test of Planck 's results and provide new insights on the tension. Since 2019, we have been taking data consistently with SPT-3G, the third-generation imaging instrument installed on the telescope in 2017.My thesis project is about analyzing data from 2019 and 2020 to substantially improve SPT-3G's existing measurements of the TE/EE spectra and constraints on cosmological parameters based on data from 2018 and to prepare for a future analysis based on the full dataset from SPT-3G. The analysis comprises three major steps: making CMB anisotropy maps from time series recorded by detectors, calculating the TT/TE/EE spectra from the maps, and fitting cosmological models to the spectra. As of the writing of this thesis in February 2024, we have produced maps and spectra and are working on constraining cosmological models. Uncertainties in the TE/EE spectra obtained from this new dataset are smaller than those from the 2018 dataset by an order of magnitude at small angular scales, and we are excited to significantly improve our existing constraints on cosmological parameters such as the Hubble constant.This thesis comprises four chapters. In chapter 1, I will discuss the origin of the three types of spectra, current measurements of the spectra and constraints on ΛCDM parameters, and future directions in the field. After that, I will introduce SPT-3G in chapter 2 by discussing important properties of the instrument and showing example raw data. Then, in chapter 3, I will discuss the dataset used in the analysis and methods involved in each major step of the analysis, In the final chapter, chapter 4, I will discuss further details of some of the methods and report results from them, show our maps and spectra, and discuss tasks that remain to be done.
■590 ▼aSchool code: 0330.
■650 4▼aAstrophysics
■650 4▼aPhysics
■650 4▼aAstronomy
■653 ▼aCosmic microwave background
■653 ▼aData analysis
■653 ▼aE-mode polarization
■653 ▼aPower spectra
■653 ▼aSouth Pole Telescope
■653 ▼aTemperature
■690 ▼a0596
■690 ▼a0605
■690 ▼a0606
■71020▼aThe University of Chicago▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0330
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160120▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
