Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways
Associated Persons Simon Deeley (Creator); Michael J. Drinkwater (Creator); Sarah M. Sweet (Creator); Warrick J. Couch (Creator); Duncan A. Forbes (Creator); Joss Bland-Hawthorn (Creator); Julia Bryant (Creator); Scott M. Croom (Creator); Jon S. Lawrence (Creator); Nuria P F Lorente (Creator); Anne...
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The University of Western Australia
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Online Access: | https://researchdata.edu.au/data-from-the-formation-pathways/1682037 |
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ftands:oai:ands.org.au::1682037 2023-11-12T04:25:37+01:00 Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways Intl Centre for Radio Astronomy Research (ICRAR) (isManagedBy) Jonathan Diaz (Creator) Kenji Bekki (Creator) Luca Cortese (Creator) https://researchdata.edu.au/data-from-the-formation-pathways/1682037 unknown The University of Western Australia https://researchdata.edu.au/data-from-the-formation-pathways/1682037 bb862a53-3ba0-4070-923d-435f5cc87b35 University of Western Australia galaxies: elliptical and lenticular cD galaxies: evolution galaxies: kinematics and dynamics Astrophysics - Astrophysics of Galaxies dataset ftands 2023-10-23T22:23:03Z Associated Persons Simon Deeley (Creator); Michael J. Drinkwater (Creator); Sarah M. Sweet (Creator); Warrick J. Couch (Creator); Duncan A. Forbes (Creator); Joss Bland-Hawthorn (Creator); Julia Bryant (Creator); Scott M. Croom (Creator); Jon S. Lawrence (Creator); Nuria P F Lorente (Creator); Anne M. Medling (Creator); Matt S. Owers (Creator); Samuel N. Richards (Creator); Jesse Van De Sande (Creator) It has been proposed that S0 galaxies are either fading spirals or the result of galaxy mergers. The relative contribution of each pathway and the environments in which they occur remain unknown. Here, we investigate stellar and gas kinematics of 219 S0s in the SAMI Survey to look for signs of multiple formation pathways occurring across the full range of environments. We identify a large range of rotational support in their stellar kinematics, which correspond to ranges in their physical structure. We find that pressure-supported S0s with v/σ below 0.5 tend to be more compact and feature misaligned stellar and gas components, suggesting an external origin for their gas. We postulate that these S0s are consistent with being formed through a merger process. Meanwhile, comparisons of ellipticity, stellar mass, and Sérsic index distributions with spiral galaxies show that the rotationally supported S0s with v/σ above 0.5 are more consistent with a faded spiral origin. In addition, a simulated merger pathway involving a compact elliptical and gas-rich satellite results in an S0 that lies within the pressure-supported group. We conclude that two S0 formation pathways are active, with mergers dominating in isolated galaxies and small groups, and the faded spiral pathway being most prominent in large groups (1013 < Mhalo < 1014). Dataset sami Research Data Australia (Australian National Data Service - ANDS) Forbes ENVELOPE(-66.550,-66.550,-67.783,-67.783) Bryant ENVELOPE(-60.942,-60.942,-71.236,-71.236) Sande ENVELOPE(7.527,7.527,62.631,62.631) Deeley ENVELOPE(-66.217,-66.217,-67.033,-67.033) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
galaxies: elliptical and lenticular cD galaxies: evolution galaxies: kinematics and dynamics Astrophysics - Astrophysics of Galaxies |
spellingShingle |
galaxies: elliptical and lenticular cD galaxies: evolution galaxies: kinematics and dynamics Astrophysics - Astrophysics of Galaxies Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways |
topic_facet |
galaxies: elliptical and lenticular cD galaxies: evolution galaxies: kinematics and dynamics Astrophysics - Astrophysics of Galaxies |
description |
Associated Persons Simon Deeley (Creator); Michael J. Drinkwater (Creator); Sarah M. Sweet (Creator); Warrick J. Couch (Creator); Duncan A. Forbes (Creator); Joss Bland-Hawthorn (Creator); Julia Bryant (Creator); Scott M. Croom (Creator); Jon S. Lawrence (Creator); Nuria P F Lorente (Creator); Anne M. Medling (Creator); Matt S. Owers (Creator); Samuel N. Richards (Creator); Jesse Van De Sande (Creator) It has been proposed that S0 galaxies are either fading spirals or the result of galaxy mergers. The relative contribution of each pathway and the environments in which they occur remain unknown. Here, we investigate stellar and gas kinematics of 219 S0s in the SAMI Survey to look for signs of multiple formation pathways occurring across the full range of environments. We identify a large range of rotational support in their stellar kinematics, which correspond to ranges in their physical structure. We find that pressure-supported S0s with v/σ below 0.5 tend to be more compact and feature misaligned stellar and gas components, suggesting an external origin for their gas. We postulate that these S0s are consistent with being formed through a merger process. Meanwhile, comparisons of ellipticity, stellar mass, and Sérsic index distributions with spiral galaxies show that the rotationally supported S0s with v/σ above 0.5 are more consistent with a faded spiral origin. In addition, a simulated merger pathway involving a compact elliptical and gas-rich satellite results in an S0 that lies within the pressure-supported group. We conclude that two S0 formation pathways are active, with mergers dominating in isolated galaxies and small groups, and the faded spiral pathway being most prominent in large groups (1013 < Mhalo < 1014). |
author2 |
Intl Centre for Radio Astronomy Research (ICRAR) (isManagedBy) Jonathan Diaz (Creator) Kenji Bekki (Creator) Luca Cortese (Creator) |
format |
Dataset |
title |
Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways |
title_short |
Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways |
title_full |
Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways |
title_fullStr |
Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways |
title_full_unstemmed |
Data from: The SAMI galaxy survey: a range in S0 properties indicating multiple formation pathways |
title_sort |
data from: the sami galaxy survey: a range in s0 properties indicating multiple formation pathways |
publisher |
The University of Western Australia |
url |
https://researchdata.edu.au/data-from-the-formation-pathways/1682037 |
long_lat |
ENVELOPE(-66.550,-66.550,-67.783,-67.783) ENVELOPE(-60.942,-60.942,-71.236,-71.236) ENVELOPE(7.527,7.527,62.631,62.631) ENVELOPE(-66.217,-66.217,-67.033,-67.033) |
geographic |
Forbes Bryant Sande Deeley |
geographic_facet |
Forbes Bryant Sande Deeley |
genre |
sami |
genre_facet |
sami |
op_source |
University of Western Australia |
op_relation |
https://researchdata.edu.au/data-from-the-formation-pathways/1682037 bb862a53-3ba0-4070-923d-435f5cc87b35 |
_version_ |
1782339768759091200 |