Understanding Massive Galaxy Evolution using Integral Field Observations
The assembly history of massive galaxies remains a major unsolved problem for galaxy evolution. In the hierarchical galaxy formation paradigm, mergers are expected to play a vital role during the evolution of massive galaxies. As galaxy-galaxy interactions are more frequent for galaxies in groups as...
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UNSW, Sydney
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ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/100514 2023-05-15T18:13:26+02:00 Understanding Massive Galaxy Evolution using Integral Field Observations Santucci, Giulia 2022 application/pdf http://hdl.handle.net/1959.4/100514 https://unsworks.unsw.edu.au/bitstreams/6eddf108-288a-418f-ba97-09ee9fd1acbe/download https://doi.org/10.26190/unsworks/24221 en eng UNSW, Sydney http://hdl.handle.net/1959.4/100514 https://unsworks.unsw.edu.au/bitstreams/6eddf108-288a-418f-ba97-09ee9fd1acbe/download https://doi.org/10.26190/unsworks/24221 open access https://purl.org/coar/access_right/c_abf2 CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ free_to_read CC-BY anzsrc-for: 510103 Cosmology and extragalactic astronomy doctoral thesis http://purl.org/coar/resource_type/c_db06 2022 ftunswworks https://doi.org/10.26190/unsworks/24221 2022-10-03T22:31:16Z The assembly history of massive galaxies remains a major unsolved problem for galaxy evolution. In the hierarchical galaxy formation paradigm, mergers are expected to play a vital role during the evolution of massive galaxies. As galaxy-galaxy interactions are more frequent for galaxies in groups as compared to isolated galaxies, a relationship between large-scale environment and galaxy properties is expected. However, many of the studies to date have found no significant dependence on environment once the known dependence on stellar mass is considered. Integral field spectroscopy enables the mapping of stellar populations and kinematics across individual galaxies. This is important since evidence of the accretion history of passive galaxies is predicted to be preserved in the stellar population radial profiles (when and how the stars were formed) and in the 2D kinematics (which contain clues about how these stars entered the halo) of low-redshift galaxies. In this project we determine how the physical properties of galaxies vary with galactocentric radius to help us constrain the evolution process of early-type galaxies, and to shed light on how their properties depend on environment. We draw a sample of passive galaxies from the SAMI Galaxy Survey, which is one of only two surveys that allow us to study a statistically significant number of galaxies in a range of environments. We first focus on stellar population gradients, which contain information on how important interactions were during the formation of the galaxy. We do not observe a significant difference between the stellar population gradients of central and satellite galaxies at fixed stellar mass and as a function of halo mass. This evidence suggests that the inner regions (within 2Re) of central passive galaxies form in a similar fashion to those of passive satellites. We also build triaxial Schwarzschild orbit-superposition models to examine the different dynamical components of galaxies. We find that the changes of internal structures within 1Re ... Doctoral or Postdoctoral Thesis sami UNSW Sydney (The University of New South Wales): UNSWorks |
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UNSW Sydney (The University of New South Wales): UNSWorks |
op_collection_id |
ftunswworks |
language |
English |
topic |
anzsrc-for: 510103 Cosmology and extragalactic astronomy |
spellingShingle |
anzsrc-for: 510103 Cosmology and extragalactic astronomy Santucci, Giulia Understanding Massive Galaxy Evolution using Integral Field Observations |
topic_facet |
anzsrc-for: 510103 Cosmology and extragalactic astronomy |
description |
The assembly history of massive galaxies remains a major unsolved problem for galaxy evolution. In the hierarchical galaxy formation paradigm, mergers are expected to play a vital role during the evolution of massive galaxies. As galaxy-galaxy interactions are more frequent for galaxies in groups as compared to isolated galaxies, a relationship between large-scale environment and galaxy properties is expected. However, many of the studies to date have found no significant dependence on environment once the known dependence on stellar mass is considered. Integral field spectroscopy enables the mapping of stellar populations and kinematics across individual galaxies. This is important since evidence of the accretion history of passive galaxies is predicted to be preserved in the stellar population radial profiles (when and how the stars were formed) and in the 2D kinematics (which contain clues about how these stars entered the halo) of low-redshift galaxies. In this project we determine how the physical properties of galaxies vary with galactocentric radius to help us constrain the evolution process of early-type galaxies, and to shed light on how their properties depend on environment. We draw a sample of passive galaxies from the SAMI Galaxy Survey, which is one of only two surveys that allow us to study a statistically significant number of galaxies in a range of environments. We first focus on stellar population gradients, which contain information on how important interactions were during the formation of the galaxy. We do not observe a significant difference between the stellar population gradients of central and satellite galaxies at fixed stellar mass and as a function of halo mass. This evidence suggests that the inner regions (within 2Re) of central passive galaxies form in a similar fashion to those of passive satellites. We also build triaxial Schwarzschild orbit-superposition models to examine the different dynamical components of galaxies. We find that the changes of internal structures within 1Re ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Santucci, Giulia |
author_facet |
Santucci, Giulia |
author_sort |
Santucci, Giulia |
title |
Understanding Massive Galaxy Evolution using Integral Field Observations |
title_short |
Understanding Massive Galaxy Evolution using Integral Field Observations |
title_full |
Understanding Massive Galaxy Evolution using Integral Field Observations |
title_fullStr |
Understanding Massive Galaxy Evolution using Integral Field Observations |
title_full_unstemmed |
Understanding Massive Galaxy Evolution using Integral Field Observations |
title_sort |
understanding massive galaxy evolution using integral field observations |
publisher |
UNSW, Sydney |
publishDate |
2022 |
url |
http://hdl.handle.net/1959.4/100514 https://unsworks.unsw.edu.au/bitstreams/6eddf108-288a-418f-ba97-09ee9fd1acbe/download https://doi.org/10.26190/unsworks/24221 |
genre |
sami |
genre_facet |
sami |
op_relation |
http://hdl.handle.net/1959.4/100514 https://unsworks.unsw.edu.au/bitstreams/6eddf108-288a-418f-ba97-09ee9fd1acbe/download https://doi.org/10.26190/unsworks/24221 |
op_rights |
open access https://purl.org/coar/access_right/c_abf2 CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ free_to_read |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.26190/unsworks/24221 |
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1766185969876205568 |