Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation
In this thesis we use the Tully-Fisher relation (TFR), the correlation between a galaxy's luminosity and its rotation velocity, to probe the luminous and dark matter in galaxies over the last ≈ 8 Gyr. First, we use samples of galaxies spatially resolved in Hα emission with integral field unit o...
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ftuloxford:oai:ora.ox.ac.uk:uuid:1169c5e2-5962-47a4-8c9f-f58fcf93bf68 2023-05-15T18:13:41+02:00 Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation Tiley, A Bureau, M 2017-06-14 https://ora.ox.ac.uk/objects/uuid:1169c5e2-5962-47a4-8c9f-f58fcf93bf68 eng eng https://ora.ox.ac.uk/objects/uuid:1169c5e2-5962-47a4-8c9f-f58fcf93bf68 info:eu-repo/semantics/openAccess Astronomy Thesis 2017 ftuloxford 2022-06-28T20:06:11Z In this thesis we use the Tully-Fisher relation (TFR), the correlation between a galaxy's luminosity and its rotation velocity, to probe the luminous and dark matter in galaxies over the last ≈ 8 Gyr. First, we use samples of galaxies spatially resolved in Hα emission with integral field unit observations from the K-band Multi-Object Spectrograph (KMOS) Redshift One Spectroscopic Survey (KROSS) at z ≈ 1 and the Sydney-Australian-Astronomical-Observatory Multi- object Integral-Field Spectrograph (SAMI) Galaxy Survey at z ≈ 0. We match the data quality, analysis methods and sample selection between the two surveys to conduct a direct comparison of the absolute K-band magnitude (MK) and stellar mass (M*) TFRs at z ≈ 1 and z ≈ 0, free of any difference in biases between them. We measure no evolution of the MK TFR zero-point for star- forming disk-like galaxies since z ≈ 1, but an increase by 0.2 ± 0.2 dex of the M* TFR zero-point for the same galaxies over the same period. This implies the total mass-to-stellar mass ratio of those galaxies has decreased by a factor of ≈ 0.4 since z ≈ 1 at fixed rotation velocity, whilst their K-band stellar mass-to- light ratio has increased by a factor of ≈ 1.6. Moderate rates of star formation in galaxies and continued gas accretion since z ≈ 1 can explain these changes. Second, we take a step toward an independent measure of the TFR evolution over the same period using carbon monoxide (CO) emission from galaxies as an alternative kinematic tracer. We present the M* and Wide-Field Infrared Survey Explorer absolute Band 1 magnitude (MW1) TFRs for galaxies from the CO Legacy Database for the Galex Arecibo SDSS Survey (COLD GASS) as z ≈ 0 benchmarks that are pre-requisites to extend the CO TFR to z ≳ 1. We find no significant offsets between the COLD GASS TFR zero-points and those of similar z ≈ 0 studies. The slope of the M* COLD GASS TFR agrees with those of similar z ≈ 0 studies, but the MW1 TFR slope is slightly shallower than previous studies at a similar redshift. We attribute ... Thesis sami ORA - Oxford University Research Archive Gass ENVELOPE(-29.543,-29.543,-80.447,-80.447) Kross ENVELOPE(-21.161,-21.161,63.981,63.981) Zero Point ENVELOPE(-37.150,-37.150,-54.117,-54.117) |
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ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
topic |
Astronomy |
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Astronomy Tiley, A Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation |
topic_facet |
Astronomy |
description |
In this thesis we use the Tully-Fisher relation (TFR), the correlation between a galaxy's luminosity and its rotation velocity, to probe the luminous and dark matter in galaxies over the last ≈ 8 Gyr. First, we use samples of galaxies spatially resolved in Hα emission with integral field unit observations from the K-band Multi-Object Spectrograph (KMOS) Redshift One Spectroscopic Survey (KROSS) at z ≈ 1 and the Sydney-Australian-Astronomical-Observatory Multi- object Integral-Field Spectrograph (SAMI) Galaxy Survey at z ≈ 0. We match the data quality, analysis methods and sample selection between the two surveys to conduct a direct comparison of the absolute K-band magnitude (MK) and stellar mass (M*) TFRs at z ≈ 1 and z ≈ 0, free of any difference in biases between them. We measure no evolution of the MK TFR zero-point for star- forming disk-like galaxies since z ≈ 1, but an increase by 0.2 ± 0.2 dex of the M* TFR zero-point for the same galaxies over the same period. This implies the total mass-to-stellar mass ratio of those galaxies has decreased by a factor of ≈ 0.4 since z ≈ 1 at fixed rotation velocity, whilst their K-band stellar mass-to- light ratio has increased by a factor of ≈ 1.6. Moderate rates of star formation in galaxies and continued gas accretion since z ≈ 1 can explain these changes. Second, we take a step toward an independent measure of the TFR evolution over the same period using carbon monoxide (CO) emission from galaxies as an alternative kinematic tracer. We present the M* and Wide-Field Infrared Survey Explorer absolute Band 1 magnitude (MW1) TFRs for galaxies from the CO Legacy Database for the Galex Arecibo SDSS Survey (COLD GASS) as z ≈ 0 benchmarks that are pre-requisites to extend the CO TFR to z ≳ 1. We find no significant offsets between the COLD GASS TFR zero-points and those of similar z ≈ 0 studies. The slope of the M* COLD GASS TFR agrees with those of similar z ≈ 0 studies, but the MW1 TFR slope is slightly shallower than previous studies at a similar redshift. We attribute ... |
author2 |
Bureau, M |
format |
Thesis |
author |
Tiley, A |
author_facet |
Tiley, A |
author_sort |
Tiley, A |
title |
Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation |
title_short |
Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation |
title_full |
Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation |
title_fullStr |
Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation |
title_full_unstemmed |
Probing the evolution of galaxies since z ~ 1 with the Tully-Fisher relation |
title_sort |
probing the evolution of galaxies since z ~ 1 with the tully-fisher relation |
publishDate |
2017 |
url |
https://ora.ox.ac.uk/objects/uuid:1169c5e2-5962-47a4-8c9f-f58fcf93bf68 |
long_lat |
ENVELOPE(-29.543,-29.543,-80.447,-80.447) ENVELOPE(-21.161,-21.161,63.981,63.981) ENVELOPE(-37.150,-37.150,-54.117,-54.117) |
geographic |
Gass Kross Zero Point |
geographic_facet |
Gass Kross Zero Point |
genre |
sami |
genre_facet |
sami |
op_relation |
https://ora.ox.ac.uk/objects/uuid:1169c5e2-5962-47a4-8c9f-f58fcf93bf68 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766186287122874368 |