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Improved Measurements of the Temperature and E-Mode Polarization of the CMB From the Full 500-Square-Degree SPTpol Dataset
Improved Measurements of the Temperature and E-Mode Polarization of the CMB From the Full 500-Square-Degree SPTpol Dataset
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211150957
- ISBN
- 9798382775234
- DDC
- 523
- 저자명
- Chou, Ti-Lin.
- 서명/저자
- Improved Measurements of the Temperature and E-Mode Polarization of the CMB From the Full 500-Square-Degree SPTpol Dataset
- 발행사항
- [Sl] : The University of Chicago, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 74 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Crawford, Thomas.
- 학위논문주기
- Thesis (Ph.D.)--The University of Chicago, 2024.
- 초록/해제
- 요약We present updated measurements of the temperature and E-mode polarization maps of the cosmic microwave background (CMB), as well as the E-mode polarization auto-power spectrum (EE) and temperature-E-mode cross-power spectrum (TE) in the angular multipole range 50 ℓ 8000, using the full four-year SPTpol 500 deg2 dataset in both the 95 GHz and 150 GHz frequency bands. These are the most sensitive measurements of the CMB damping tail to date for roughly ℓ 1700 in TE and ℓ 2000 in EE. This dataset and most of its subsets are good fits to the ΛCDM model. This dataset is self-consistent but has a curiosity that persists from the previously published SPTpol TE/EE analysis. The ΛCDM parameter constraints between the ℓ 1000 data splits are different by ≲ 2σ, where ℓ 1000 prefers a high H0 and a low 109Ase −2τ . In 150 GHz, H0 is 66.93 ± 4.64 km s−1 Mpc−1 in the ℓ 1000 data split. This same trend is seen in both 95 GHz data alone and 150 GHz data alone, which suggests this is a real feature on this 500 deg2 patch of sky. We also find the degree of lensing of the CMB, inferred from the smearing of TE/EE power spectrum peaks, to be lower than unity (AL = 0.70 ± 0.13). With AL fixed to 0.7, the ΛCDM parameter constraints agree between the 150 GHz ℓ 1000 data splits, therefore the AL curiosity is another way to represent the high / low-ℓ curiosity. In the base ΛCDM model, our As is significantly lower than Planck, but when we fit our data with the ΛCDM + AL extended model, our marginalized ΛCDM parameter constraints become consistent with Planck.
- 일반주제명
- Astrophysics
- 일반주제명
- Astronomy
- 일반주제명
- Physics
- 키워드
- Cosmology
- 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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■00520250211150957
■006m o d
■007cr#unu||||||||
■020 ▼a9798382775234
■035 ▼a(MiAaPQ)AAI30993693
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a523
■1001 ▼aChou, Ti-Lin.▼0(orcid)0000-0002-3091-8790
■24510▼aImproved Measurements of the Temperature and E-Mode Polarization of the CMB From the Full 500-Square-Degree SPTpol Dataset
■260 ▼a[Sl]▼bThe University of Chicago▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a74 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Crawford, Thomas.
■5021 ▼aThesis (Ph.D.)--The University of Chicago, 2024.
■520 ▼aWe present updated measurements of the temperature and E-mode polarization maps of the cosmic microwave background (CMB), as well as the E-mode polarization auto-power spectrum (EE) and temperature-E-mode cross-power spectrum (TE) in the angular multipole range 50 ℓ 8000, using the full four-year SPTpol 500 deg2 dataset in both the 95 GHz and 150 GHz frequency bands. These are the most sensitive measurements of the CMB damping tail to date for roughly ℓ 1700 in TE and ℓ 2000 in EE. This dataset and most of its subsets are good fits to the ΛCDM model. This dataset is self-consistent but has a curiosity that persists from the previously published SPTpol TE/EE analysis. The ΛCDM parameter constraints between the ℓ 1000 data splits are different by ≲ 2σ, where ℓ 1000 prefers a high H0 and a low 109Ase −2τ . In 150 GHz, H0 is 66.93 ± 4.64 km s−1 Mpc−1 in the ℓ 1000 data split. This same trend is seen in both 95 GHz data alone and 150 GHz data alone, which suggests this is a real feature on this 500 deg2 patch of sky. We also find the degree of lensing of the CMB, inferred from the smearing of TE/EE power spectrum peaks, to be lower than unity (AL = 0.70 ± 0.13). With AL fixed to 0.7, the ΛCDM parameter constraints agree between the 150 GHz ℓ 1000 data splits, therefore the AL curiosity is another way to represent the high / low-ℓ curiosity. In the base ΛCDM model, our As is significantly lower than Planck, but when we fit our data with the ΛCDM + AL extended model, our marginalized ΛCDM parameter constraints become consistent with Planck.
■590 ▼aSchool code: 0330.
■650 4▼aAstrophysics
■650 4▼aAstronomy
■650 4▼aPhysics
■653 ▼aCosmic microwave background
■653 ▼aCosmology
■653 ▼aSouth Pole Telescope
■653 ▼aAuto-power spectrum
■690 ▼a0596
■690 ▼a0606
■690 ▼a0605
■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=T17160325▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
