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Galaxy Overdensities and Emission Line Galaxies in the Faint Infrared Grism Survey
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Galaxy Overdensities and Emission Line Galaxies in the Faint Infrared Grism Survey. |
| 개인저자 | Pharo, John. |
| 단체저자명 | Arizona State University. Astrophysics. |
| 발행사항 | [S.l.]: Arizona State University., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 164 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-03B. Dissertation Abstract International |
| ISBN | 9781085691260 |
| 학위논문주기 | Thesis (Ph.D.)--Arizona State University, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
Advisor: Malhotra, Sangeeta |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Learning how properties of galaxies such as star formation, galaxy interactions, chemical composition, and others evolve to produce the modern universe has long been a goal of extragalactic astronomy. In recent years, grism spectroscopy from the Hubble Space Telescope (HST) has provided a means to study these properties with spectroscopy while avoiding the limitations of ground-based observation. In this dissertation, I present several studies wherein I used HST G102 grism spectroscopy from the Faint Infrared Grism Survey (FIGS) to investigate these fundamental properties of galaxies and how they interact and evolve. In the first study, I combined the grism spectra with broadband photometry to produce a catalog of redshifts with improved accuracy, reducing the median redshift error from 3% to 2%. With this redshift catalog, I conducted a systematic search for galaxy overdensities in the FIGS fields, producing a list of 24 significant candidates. In the second study, I developed a method for identifying emission line galaxy (ELG) candidates from continuum-subtracted 1D spectra, and identified 71 ELGs in one FIGS field. In matching MUSE/VLT spectra, I measured the [OIII]貫4363 emission line for 14 FIGS ELGs, and used this to measure their Te-based gas-phase metallicities. These ELGs show a low-metallicity offset on the Mass-Metallicity Relation, and I demonstrated that this offset can be explained by recent star formation. In the third study, I expanded the ELG search to all four FIGS fields, identifying 208 H慣, [OIII]貫貫4959,5007, and [OII]貫貫3727,3729 line emitters. I compiled a catalog of line fluxes, redshifts, and equivalent widths. I combined this catalog with the overdensity study to investigate a possible relationship between line luminosity, star formation, and an ELG's environment. In the fourth study, I used 15 FIGS H慣 emitters and 49 "green pea" line emitters to compare H慣 and the far-UV continuum as tracers of star formation. I explored a correlation between the H慣-FUV ratio and the ratio of [OIII]貫貫4959,5007 to [OII]貫貫3727,3729 and its implications for star formation history. |
| 일반주제명 | Astrophysics. |
| 언어 | 영어 |
| 바로가기 | 
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