자료유형  

 학위논문

Control Number  

0017164598

International Standard Book Number  

9798896071150

Dewey Decimal Classification Number  

520

Main Entry-Personal Name  

Oppor, Joshua E.

Publication, Distribution, etc. (Imprint  

[S.l.] : The University of Wisconsin - Madison., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

335 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-04, Section: B.

General Note  

Advisor: Bershady, Matthew A.

Dissertation Note  

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.

Summary, Etc.  

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.

Subject Added Entry-Topical Term  

Astronomy.

Subject Added Entry-Topical Term  

Astrophysics.

Subject Added Entry-Topical Term  

Optics.

Subject Added Entry-Topical Term  

Computational physics.

Index Term-Uncontrolled  

Extragalactic astronomy

Index Term-Uncontrolled  

Galaxy evolution

Index Term-Uncontrolled  

LADUMA

Index Term-Uncontrolled  

NIRWALS

Index Term-Uncontrolled  

Rotational velocity

Index Term-Uncontrolled  

Tully-Fisher Relation

Added Entry-Corporate Name  

The University of Wisconsin - Madison Astronomy

Host Item Entry  

Dissertations Abstracts International. 86-04B.

Electronic Location and Access  

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Control Number  

joongbu:656584