| Tag |
First Indicator |
Second Indicator |
Subfields |
| LEADER |
00000nam a22000004i 4500 |
| 001 |
in00005468331 |
| 008 |
240823s2023 txu∎∎∎∎ obm 000 0 eng d |
| 006 |
m fo d |
| 007 |
cr unu|||||||| |
| 005 |
20240829173455.5 |
| 035 |
|
|
|a 1453095945
|
| 040 |
|
|
|a TXA
|c TXA
|b eng
|e rda
|e pn
|
| 035 |
|
|
|a (TxCM)https://hdl.handle.net/1969.1/197785
|
| 099 |
|
|
|a 2022
|a Dissertation
|
| 049 |
|
|
|a TXAM
|
| 100 |
1 |
|
|a Cohn, Jonathan Hall,
|e author.
|
| 245 |
1 |
0 |
|a Exploring the Extremes of Galaxy Evolution: Progenitors of Star-Forming Galaxies and Relics of Quiescent Galaxies /
|c by Jonathan Cohn.
|
| 264 |
|
1 |
|a [College Station, Texas] :
|b [Texas A&M University],
|c [2023]
|
| 300 |
|
|
|a 1 online resource.
|
| 336 |
|
|
|a text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a computer
|b c
|2 rdamedia
|
| 338 |
|
|
|a online resource
|b cr
|2 rdacarrier
|
| 347 |
|
|
|a text file
|b PDF
|2 rda
|
| 500 |
|
|
|a "Major Subject: Astronomy"
|
| 500 |
|
|
|a Includes vita.
|
| 502 |
|
|
|b Doctor of Philosophy
|c Texas A&M University
|d 2022
|o https://hdl.handle.net/1969.1/197785
|
| 504 |
|
|
|a Includes bibliographical references.
|
| 516 |
|
|
|a Text (Dissertation)
|
| 520 |
3 |
|
|a In this dissertation, I investigate the formation and evolution of galaxies by studying two extreme populations ⁰́₄ young, highly star forming galaxies (SFGs) at z > 2, and old, quiescent galaxies in the local Universe that are likely unchanged since z ⁹́⁸ 2. In the first project, I use spectral energy distribution (SED)-fitting to analyze the star formation histories (SFHs) of a population of extreme emission line galaxies (EELGs) identified in the ZFOURGE Survey at 2.5 ⁹́Þ z ⁹́Þ 4, comparing them to more typical SFGs at the same redshift range. This is the first z > 2 study to use the PROSPECTOR SED-fitting code. The EELGs display rising SFHs in the most recent 50 Myr, while more typical SFGs do not. I estimate that many, if not most, SFGs at z ⁹́Æ 2.5 undergo an extreme HÎø+[OIII] emission line phase early in their lifetimes. In the second project, I present 0Êð.14-resolution Atacama Large Millimeter/submillimeter Array (ALMA) CO(2⁸́₂1) observations of the circumnuclear gas disk in the local compact galaxy UGC 2698, a member of a sample of nearby early-type galaxies that are plausible z ⁹́⁸ 2 red nugget relics. I fit molecular gas-dynamical models to the ALMA data cube, assuming the CO emission originates from a dynamically cold, thin disk, and measure the mass of the supermassive black hole (BH) in UGC 2698. I explore systematics in the model and their effects on the measured BH mass. The BH in UGC 2698 is found to be consistent with the BH scaling relations, which I contrast with previous stellar-dynamical measurements for three other objects in the local compact galaxy sample. In the third project, I present ALMA CO(2⁸́₂1) observations at a resolution of 0Êð.22 in the local compact galaxies NGC 384 and PGC 11179. I make preliminary molecular gas-dynamical BH mass measurements in these galaxies and explore their systematic uncertainties. Finally, I discuss the next steps required to finalize these measurements and the implications of these results for our understanding of BH⁸́₂host galaxy co-evolution and the scatter of the BH scaling relations. The electronic version of this dissertation is accessible from https://hdl.handle.net/1969.1/197785
|
| 588 |
|
|
|a Description from author supplied metadata (automated record created 2023-05-26 13:21:37).
|
| 650 |
|
4 |
|a Major Astronomy
|
| 653 |
|
|
|a Galaxies
|
| 653 |
|
|
|a Star formation histories
|
| 653 |
|
|
|a Black holes
|
| 653 |
|
|
|a molecular gas
|
| 700 |
1 |
|
|a Walsh, Jonelle,
|e thesis advisor.
|
| 710 |
2 |
|
|a Texas A&M University,
|e degree granting institution.
|
| 856 |
4 |
0 |
|3 Texas A&M University
|u https://hdl.handle.net/1969.1/197785
|z Link to OAKTrust Copy
|t 0
|
| 999 |
f |
f |
|s ff7fb04b-9f56-4a06-b991-630402804c21
|i f068acaa-20b0-4f09-bb35-4f76c1379240
|t 0
|
| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|s www_evans
|d Available Online
|t 0
|
| 998 |
f |
f |
|t 0
|l Available Online
|