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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 Develop...
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  
Extragalactic astronomy
키워드  
Galaxy evolution
키워드  
LADUMA
키워드  
NIRWALS
키워드  
Rotational velocity
키워드  
Tully-Fisher Relation
기타저자  
The University of Wisconsin - Madison Astronomy
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■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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