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Empirical Approaches to the Near-Infrared Tip of the Red Giant Branch- [electronic resource]
Empirical Approaches to the Near-Infrared Tip of the Red Giant Branch- [electronic resource]
상세정보
- 자료유형
- 학위논문파일 국외
- 최종처리일시
- 20240214101217
- ISBN
- 9798380329989
- DDC
- 520
- 서명/저자
- Empirical Approaches to the Near-Infrared Tip of the Red Giant Branch - [electronic resource]
- 발행사항
- [S.l.]: : University of Washington., 2023
- 발행사항
- Ann Arbor : : ProQuest Dissertations & Theses,, 2023
- 형태사항
- 1 online resource(293 p.)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
- 주기사항
- Advisor: Dalcanton, Julianne J.
- 학위논문주기
- Thesis (Ph.D.)--University of Washington, 2023.
- 사용제한주기
- This item must not be sold to any third party vendors.
- 초록/해제
- 요약The infrared tip of the red giant branch (IR-TRGB) is a powerful tool for measuring distances to galaxies in the local Universe. However, establishing its absolute "anchor" with sufficient precision and accuracy has proved challenging due to lingering sources of systematic uncertainty in both theoretical predictions and empirical calibrations. Here I describe three studies aimed at improving observational constraints on the IR-TRGB. First, I develop a computational method for self-consistently measuring TRGB magnitudes and colors, and the covariance thereof, in multiwavelength stellar photometry catalogs. Traditional detection methods either marginalize over color, or else rely on assuming a fidicial color dependence, both of which may result in different stellar populations dominating the TRGB signal at different wavelengths. Next, I explore two complementary approaches to reconciling observations of the IR-TRGB as measured with ground- and space-based instruments respectively. The former are impacted by absorption features in Earth's atmosphere, where the latter are not. Furthermore, there is an extremely limited range of magnitudes at which current facilities can achieve the requisite data quality from both locations. To this end, I derive transformation equations between respective photometric systems using synthetic photometry of observed stellar spectra, and then present initial results from a three-year observing campaign designed to directly compare space- and ground-based observations of bright RGB stars in the Magellanic Clouds.
- 일반주제명
- Astronomy.
- 일반주제명
- Astrophysics.
- 키워드
- Galaxies
- 키워드
- Color dependence
- 기타저자
- University of Washington Astronomy
- 기본자료저록
- Dissertations Abstracts International. 85-03B.
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520240214101217
■006m o d
■007cr#unu||||||||
■020 ▼a9798380329989
■035 ▼a(MiAaPQ)AAI30526035
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a520
■1001 ▼aDurbin, Meredith.
■24510▼aEmpirical Approaches to the Near-Infrared Tip of the Red Giant Branch▼h[electronic resource]
■260 ▼a[S.l.]:▼bUniversity of Washington. ▼c2023
■260 1▼aAnn Arbor :▼bProQuest Dissertations & Theses, ▼c2023
■300 ▼a1 online resource(293 p.)
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-03, Section: B.
■500 ▼aAdvisor: Dalcanton, Julianne J.
■5021 ▼aThesis (Ph.D.)--University of Washington, 2023.
■506 ▼aThis item must not be sold to any third party vendors.
■520 ▼aThe infrared tip of the red giant branch (IR-TRGB) is a powerful tool for measuring distances to galaxies in the local Universe. However, establishing its absolute "anchor" with sufficient precision and accuracy has proved challenging due to lingering sources of systematic uncertainty in both theoretical predictions and empirical calibrations. Here I describe three studies aimed at improving observational constraints on the IR-TRGB. First, I develop a computational method for self-consistently measuring TRGB magnitudes and colors, and the covariance thereof, in multiwavelength stellar photometry catalogs. Traditional detection methods either marginalize over color, or else rely on assuming a fidicial color dependence, both of which may result in different stellar populations dominating the TRGB signal at different wavelengths. Next, I explore two complementary approaches to reconciling observations of the IR-TRGB as measured with ground- and space-based instruments respectively. The former are impacted by absorption features in Earth's atmosphere, where the latter are not. Furthermore, there is an extremely limited range of magnitudes at which current facilities can achieve the requisite data quality from both locations. To this end, I derive transformation equations between respective photometric systems using synthetic photometry of observed stellar spectra, and then present initial results from a three-year observing campaign designed to directly compare space- and ground-based observations of bright RGB stars in the Magellanic Clouds.
■590 ▼aSchool code: 0250.
■650 4▼aAstronomy.
■650 4▼aAstrophysics.
■653 ▼aGalaxies
■653 ▼aEmpirical calibrations
■653 ▼aMagellanic Clouds
■653 ▼aColor dependence
■690 ▼a0606
■690 ▼a0596
■71020▼aUniversity of Washington▼bAstronomy.
■7730 ▼tDissertations Abstracts International▼g85-03B.
■773 ▼tDissertation Abstract International
■790 ▼a0250
■791 ▼aPh.D.
■792 ▼a2023
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16933201▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a202402▼f2024
