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Characterizing Resolved and Unresolved Kinematics of Low-Redshift Galaxies and the Development of the NIRWALS Integral Field Unit
Characterizing Resolved and Unresolved Kinematics of Low-Redshift Galaxies and the Development of the NIRWALS Integral Field Unit
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153021
- ISBN
- 9798896071150
- DDC
- 520
- 저자명
- Oppor, Joshua E.
- 서명/저자
- Characterizing Resolved and Unresolved Kinematics of Low-Redshift Galaxies and the Development of the NIRWALS Integral Field Unit
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 335 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
- 주기사항
- Advisor: Bershady, Matthew A.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
- 초록/해제
- 요약My thesis work necessitates integral field unit technology to further understand galaxy kinematics, fundamental scaling relations like the Tully-Fisher Relation (TFR) and more broadly the field of galaxy evolution. In chapter 2 the statistical power of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) sample is used to measure the lag in rotational velocity between HII-regions and low ionization emission-line regions (LIER)-like diffuse ionized gas (DIG). While we see suggestions of the effect in aggregate, we seldom find galaxies with strong enough signal at high enough radial extent to constrain a difference in rotational velocity and thus of enhanced pressure support in LIER-like DIG. We did identify galaxies which are dominated in the outskirts by LIERlike DIG, motivating further study. In chapter 3 we measure the unresolved rotational velocities of 142 galaxies in the Looking at the Distant Universe with the MeerKAT Array (LADUMA) field and compare the tightness in the TFR to a calibrated sample found in Ponomoreva (2017). Our analysis of TFR residuals and scatter suggest that apparently smaller galaxies need to be corrected for having inherently higher b/a than their resolved counterparts - due to optical beam-smearing. We suggest that velocity field analyses and methods of forward modeling to discern galaxy geometry is necessary to further reduce scatter in the TFR. We find that careful selection of galaxies based on the shape of integrated HI profiles can provide a cleaner sample with which to measure the TFR, especially useful for selecting galaxies at higher redshift. In a subset of 80 galaxies we find that envelope-fit rotational velocities seem to be systematically higher than spatially-unresolved line-widths, suggesting that both fully corrected W20 and W50 may be underestimating rotational velocities. Resolved HI rotation curves are shown to agree with that of Hα rotation curves in a small sample of 10 galaxies, except for potentially in galaxies which are predominately LIER-like. In chapter 4 I describe work on the near-infrared Washburn Astronomical Laboratory spectrograph (NIRWALS) instrument, which is heavily motivated by the desire to measure the rotational velocities of heavily dust-obscured edge-on galaxies and to further study statistics of the TFR. The instrument can be used to measure near-infrared emission lines and distinguish HII-region and LIER-like DIG in a similar fashion as optical emission line diagnostics.
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Optics
- 일반주제명
- Computational physics
- 키워드
- Galaxy evolution
- 키워드
- LADUMA
- 키워드
- NIRWALS
- 기타저자
- The University of Wisconsin - Madison Astronomy
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017164598
■00520250211153021
■006m o d
■007cr#unu||||||||
■020 ▼a9798896071150
■035 ▼a(MiAaPQ)AAI31631982
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a520
■1001 ▼aOppor, Joshua E.
■24510▼aCharacterizing Resolved and Unresolved Kinematics of Low-Redshift Galaxies and the Development of the NIRWALS Integral Field Unit
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a335 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: B.
■500 ▼aAdvisor: Bershady, Matthew A.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
■520 ▼aMy thesis work necessitates integral field unit technology to further understand galaxy kinematics, fundamental scaling relations like the Tully-Fisher Relation (TFR) and more broadly the field of galaxy evolution. In chapter 2 the statistical power of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) sample is used to measure the lag in rotational velocity between HII-regions and low ionization emission-line regions (LIER)-like diffuse ionized gas (DIG). While we see suggestions of the effect in aggregate, we seldom find galaxies with strong enough signal at high enough radial extent to constrain a difference in rotational velocity and thus of enhanced pressure support in LIER-like DIG. We did identify galaxies which are dominated in the outskirts by LIERlike DIG, motivating further study. In chapter 3 we measure the unresolved rotational velocities of 142 galaxies in the Looking at the Distant Universe with the MeerKAT Array (LADUMA) field and compare the tightness in the TFR to a calibrated sample found in Ponomoreva (2017). Our analysis of TFR residuals and scatter suggest that apparently smaller galaxies need to be corrected for having inherently higher b/a than their resolved counterparts - due to optical beam-smearing. We suggest that velocity field analyses and methods of forward modeling to discern galaxy geometry is necessary to further reduce scatter in the TFR. We find that careful selection of galaxies based on the shape of integrated HI profiles can provide a cleaner sample with which to measure the TFR, especially useful for selecting galaxies at higher redshift. In a subset of 80 galaxies we find that envelope-fit rotational velocities seem to be systematically higher than spatially-unresolved line-widths, suggesting that both fully corrected W20 and W50 may be underestimating rotational velocities. Resolved HI rotation curves are shown to agree with that of Hα rotation curves in a small sample of 10 galaxies, except for potentially in galaxies which are predominately LIER-like. In chapter 4 I describe work on the near-infrared Washburn Astronomical Laboratory spectrograph (NIRWALS) instrument, which is heavily motivated by the desire to measure the rotational velocities of heavily dust-obscured edge-on galaxies and to further study statistics of the TFR. The instrument can be used to measure near-infrared emission lines and distinguish HII-region and LIER-like DIG in a similar fashion as optical emission line diagnostics.
■590 ▼aSchool code: 0262.
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aOptics
■650 4▼aComputational physics
■653 ▼aExtragalactic astronomy
■653 ▼aGalaxy evolution
■653 ▼aLADUMA
■653 ▼aNIRWALS
■653 ▼aRotational velocity
■653 ▼aTully-Fisher Relation
■690 ▼a0606
■690 ▼a0596
■690 ▼a0752
■690 ▼a0216
■71020▼aThe University of Wisconsin - Madison▼bAstronomy.
■7730 ▼tDissertations Abstracts International▼g86-04B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164598▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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