Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies
We present stellar rotation curves and velocity dispersion profiles for 104 quiescent galaxies at z = 0.6-1 from the Large Early Galaxy Astrophysics Census (LEGA-C) spectroscopic survey. Rotation is typically probed across 10-20 kpc, or to an average of 2.7R(e). Combined with central stellar velocit...
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Online Access: | https://biblio.ugent.be/publication/8562684 http://hdl.handle.net/1854/LU-8562684 https://doi.org/10.3847/1538-4357/aabc55 https://biblio.ugent.be/publication/8562684/file/8580333 |
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ftunivgent:oai:archive.ugent.be:8562684 2023-06-11T04:16:26+02:00 Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies Bezanson, Rachel van der Wel, Arjen Pacifici, Camilla Noeske, Kai Barišić, Ivana Bell, Eric F Brammer, Gabriel B Calhau, Joao Chauke, Priscilla van Dokkum, Pieter Franx, Marijn Gallazzi, Anna van Houdt, Josha Labbé, Ivo Maseda, Michael V Muños-Mateos, Juan Carlos Muzzin, Adam van de Sande, Jesse Sobral, David Straatman, Caroline Wu, Po-Feng 2018 application/pdf https://biblio.ugent.be/publication/8562684 http://hdl.handle.net/1854/LU-8562684 https://doi.org/10.3847/1538-4357/aabc55 https://biblio.ugent.be/publication/8562684/file/8580333 eng eng https://biblio.ugent.be/publication/8562684 http://hdl.handle.net/1854/LU-8562684 http://dx.doi.org/10.3847/1538-4357/aabc55 https://biblio.ugent.be/publication/8562684/file/8580333 No license (in copyright) info:eu-repo/semantics/openAccess ASTROPHYSICAL JOURNAL ISSN: 0004-637X ISSN: 1538-4357 Physics and Astronomy galaxies elliptical and lenticular cD - galaxies evolution - galaxies high-redshift - galaxies kinematics and dynamics - galaxies structure HUBBLE-SPACE-TELESCOPE TULLY-FISHER RELATION SUPERDENSE MASSIVE GALAXIES STAR-FORMING GALAXIES INSIDE-OUT GROWTH INFRARED SPECTROSCOPIC SURVEY HIGH-REDSHIFT GALAXIES K-SELECTED GALAXIES SAMI PILOT SURVEY ELLIPTIC GALAXIES journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.3847/1538-4357/aabc55 2023-05-10T22:41:42Z We present stellar rotation curves and velocity dispersion profiles for 104 quiescent galaxies at z = 0.6-1 from the Large Early Galaxy Astrophysics Census (LEGA-C) spectroscopic survey. Rotation is typically probed across 10-20 kpc, or to an average of 2.7R(e). Combined with central stellar velocity dispersions (sigma(0)) this provides the first determination of the dynamical state of a sample selected by a lack of star formation activity at large lookback time. The most massive galaxies (M-star > 2 x 10(11) M-circle dot) generally show no or little rotation measured at 5 kpc (vertical bar V-5 vertical bar /sigma(0) < 0.2 in eight of ten cases), while similar to 64% of less massive galaxies show significant rotation. This is reminiscent of local fast-and slow-rotating ellipticals and implies that low-and high-redshift quiescent galaxies have qualitatively similar dynamical structures. We compare vertical bar V-5 vertical bar sigma(0) distributions at z similar to 0.8 and the present day by re-binning and smoothing the kinematic maps of 91 low-redshift quiescent galaxies from the Calar Alto Legacy Integral Field Area (CALIFA) survey and find evidence for a decrease in rotational support since z similar to 1. This result is especially strong when galaxies are compared at fixed velocity dispersion; if velocity dispersion does not evolve for individual galaxies then the rotational velocity at 5 kpc was an average of 94 +/- 22% higher in z similar to 0.8 quiescent galaxies than today. Considering that the number of quiescent galaxies grows with time and that new additions to the population descend from rotationally supported star-forming galaxies, our results imply that quiescent galaxies must lose angular momentum between z similar to 1 and the present, presumably through dissipationless merging, and/or that the mechanism that transforms star-forming galaxies also reduces their rotational support. Article in Journal/Newspaper sami Ghent University Academic Bibliography Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) The Astrophysical Journal 858 1 60 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Physics and Astronomy galaxies elliptical and lenticular cD - galaxies evolution - galaxies high-redshift - galaxies kinematics and dynamics - galaxies structure HUBBLE-SPACE-TELESCOPE TULLY-FISHER RELATION SUPERDENSE MASSIVE GALAXIES STAR-FORMING GALAXIES INSIDE-OUT GROWTH INFRARED SPECTROSCOPIC SURVEY HIGH-REDSHIFT GALAXIES K-SELECTED GALAXIES SAMI PILOT SURVEY ELLIPTIC GALAXIES |
spellingShingle |
Physics and Astronomy galaxies elliptical and lenticular cD - galaxies evolution - galaxies high-redshift - galaxies kinematics and dynamics - galaxies structure HUBBLE-SPACE-TELESCOPE TULLY-FISHER RELATION SUPERDENSE MASSIVE GALAXIES STAR-FORMING GALAXIES INSIDE-OUT GROWTH INFRARED SPECTROSCOPIC SURVEY HIGH-REDSHIFT GALAXIES K-SELECTED GALAXIES SAMI PILOT SURVEY ELLIPTIC GALAXIES Bezanson, Rachel van der Wel, Arjen Pacifici, Camilla Noeske, Kai Barišić, Ivana Bell, Eric F Brammer, Gabriel B Calhau, Joao Chauke, Priscilla van Dokkum, Pieter Franx, Marijn Gallazzi, Anna van Houdt, Josha Labbé, Ivo Maseda, Michael V Muños-Mateos, Juan Carlos Muzzin, Adam van de Sande, Jesse Sobral, David Straatman, Caroline Wu, Po-Feng Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies |
topic_facet |
Physics and Astronomy galaxies elliptical and lenticular cD - galaxies evolution - galaxies high-redshift - galaxies kinematics and dynamics - galaxies structure HUBBLE-SPACE-TELESCOPE TULLY-FISHER RELATION SUPERDENSE MASSIVE GALAXIES STAR-FORMING GALAXIES INSIDE-OUT GROWTH INFRARED SPECTROSCOPIC SURVEY HIGH-REDSHIFT GALAXIES K-SELECTED GALAXIES SAMI PILOT SURVEY ELLIPTIC GALAXIES |
description |
We present stellar rotation curves and velocity dispersion profiles for 104 quiescent galaxies at z = 0.6-1 from the Large Early Galaxy Astrophysics Census (LEGA-C) spectroscopic survey. Rotation is typically probed across 10-20 kpc, or to an average of 2.7R(e). Combined with central stellar velocity dispersions (sigma(0)) this provides the first determination of the dynamical state of a sample selected by a lack of star formation activity at large lookback time. The most massive galaxies (M-star > 2 x 10(11) M-circle dot) generally show no or little rotation measured at 5 kpc (vertical bar V-5 vertical bar /sigma(0) < 0.2 in eight of ten cases), while similar to 64% of less massive galaxies show significant rotation. This is reminiscent of local fast-and slow-rotating ellipticals and implies that low-and high-redshift quiescent galaxies have qualitatively similar dynamical structures. We compare vertical bar V-5 vertical bar sigma(0) distributions at z similar to 0.8 and the present day by re-binning and smoothing the kinematic maps of 91 low-redshift quiescent galaxies from the Calar Alto Legacy Integral Field Area (CALIFA) survey and find evidence for a decrease in rotational support since z similar to 1. This result is especially strong when galaxies are compared at fixed velocity dispersion; if velocity dispersion does not evolve for individual galaxies then the rotational velocity at 5 kpc was an average of 94 +/- 22% higher in z similar to 0.8 quiescent galaxies than today. Considering that the number of quiescent galaxies grows with time and that new additions to the population descend from rotationally supported star-forming galaxies, our results imply that quiescent galaxies must lose angular momentum between z similar to 1 and the present, presumably through dissipationless merging, and/or that the mechanism that transforms star-forming galaxies also reduces their rotational support. |
format |
Article in Journal/Newspaper |
author |
Bezanson, Rachel van der Wel, Arjen Pacifici, Camilla Noeske, Kai Barišić, Ivana Bell, Eric F Brammer, Gabriel B Calhau, Joao Chauke, Priscilla van Dokkum, Pieter Franx, Marijn Gallazzi, Anna van Houdt, Josha Labbé, Ivo Maseda, Michael V Muños-Mateos, Juan Carlos Muzzin, Adam van de Sande, Jesse Sobral, David Straatman, Caroline Wu, Po-Feng |
author_facet |
Bezanson, Rachel van der Wel, Arjen Pacifici, Camilla Noeske, Kai Barišić, Ivana Bell, Eric F Brammer, Gabriel B Calhau, Joao Chauke, Priscilla van Dokkum, Pieter Franx, Marijn Gallazzi, Anna van Houdt, Josha Labbé, Ivo Maseda, Michael V Muños-Mateos, Juan Carlos Muzzin, Adam van de Sande, Jesse Sobral, David Straatman, Caroline Wu, Po-Feng |
author_sort |
Bezanson, Rachel |
title |
Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies |
title_short |
Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies |
title_full |
Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies |
title_fullStr |
Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies |
title_full_unstemmed |
Spatially resolved stellar kinematics from LEGA-C : increased rotational support in z ∼ 0.8 quiescent galaxies |
title_sort |
spatially resolved stellar kinematics from lega-c : increased rotational support in z ∼ 0.8 quiescent galaxies |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8562684 http://hdl.handle.net/1854/LU-8562684 https://doi.org/10.3847/1538-4357/aabc55 https://biblio.ugent.be/publication/8562684/file/8580333 |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
Hubble |
geographic_facet |
Hubble |
genre |
sami |
genre_facet |
sami |
op_source |
ASTROPHYSICAL JOURNAL ISSN: 0004-637X ISSN: 1538-4357 |
op_relation |
https://biblio.ugent.be/publication/8562684 http://hdl.handle.net/1854/LU-8562684 http://dx.doi.org/10.3847/1538-4357/aabc55 https://biblio.ugent.be/publication/8562684/file/8580333 |
op_rights |
No license (in copyright) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3847/1538-4357/aabc55 |
container_title |
The Astrophysical Journal |
container_volume |
858 |
container_issue |
1 |
container_start_page |
60 |
_version_ |
1768374668334465024 |