Ionized gas discs in elliptical and S0 galaxies at z < 1
We analyse the extended, ionized-gas emission of 24 early-type galaxies (ETGs) at 0 < z < 1 from the ESO Distant Cluster Survey (EDisCS). We discuss different possible sources of ionization and favour star formation as the main cause of the observed emission. 10 galaxies have disturbed gas kin...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
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Oxford University Press
2014
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| Online Access: | https://eprints.nottingham.ac.uk/42055/ |
| _version_ | 1848796407807344640 |
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| author | Jaffe, Yara L. Aragón-Salamanca, Alfonso Ziegler, Bodo Kuntschner, Harald Zaritsky, Dennis Rudnick, Gregory Poggianti, Bianca M. Hoyos, Carlos Halliday, Claire Demarco, Ricardo |
| author_facet | Jaffe, Yara L. Aragón-Salamanca, Alfonso Ziegler, Bodo Kuntschner, Harald Zaritsky, Dennis Rudnick, Gregory Poggianti, Bianca M. Hoyos, Carlos Halliday, Claire Demarco, Ricardo |
| author_sort | Jaffe, Yara L. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We analyse the extended, ionized-gas emission of 24 early-type galaxies (ETGs) at 0 < z < 1 from the ESO Distant Cluster Survey (EDisCS). We discuss different possible sources of ionization and favour star formation as the main cause of the observed emission. 10 galaxies have disturbed gas kinematics, while 14 have rotating gas discs. In addition, 15 galaxies are in the field, while 9 are in the infall regions of clusters. This implies that, if the gas has an internal origin, this is likely stripped as the galaxies get closer to the cluster centre. If the gas instead comes from an external source, then our results suggest that this is more likely acquired outside the cluster environment, where galaxy–galaxy interactions more commonly take place. We analyse the Tully–Fisher relation of the ETGs with gas discs, and compare them to EDisCS spirals. Taking a matched range of redshifts, MB < −20, and excluding galaxies with large velocity uncertainties, we find that, at fixed rotational velocity, ETGs are 1.7 mag fainter in MB than spirals. At fixed stellar mass, we also find that ETGs have systematically lower specific star formation rates than spirals. This study constitutes an important step forward towards the understanding of the evolution of the complex ISM in ETGs by significantly extending the look-back-time baseline explored so far. |
| first_indexed | 2025-11-14T19:47:30Z |
| format | Article |
| id | nottingham-42055 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:47:30Z |
| publishDate | 2014 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-420552020-05-04T16:45:47Z https://eprints.nottingham.ac.uk/42055/ Ionized gas discs in elliptical and S0 galaxies at z < 1 Jaffe, Yara L. Aragón-Salamanca, Alfonso Ziegler, Bodo Kuntschner, Harald Zaritsky, Dennis Rudnick, Gregory Poggianti, Bianca M. Hoyos, Carlos Halliday, Claire Demarco, Ricardo We analyse the extended, ionized-gas emission of 24 early-type galaxies (ETGs) at 0 < z < 1 from the ESO Distant Cluster Survey (EDisCS). We discuss different possible sources of ionization and favour star formation as the main cause of the observed emission. 10 galaxies have disturbed gas kinematics, while 14 have rotating gas discs. In addition, 15 galaxies are in the field, while 9 are in the infall regions of clusters. This implies that, if the gas has an internal origin, this is likely stripped as the galaxies get closer to the cluster centre. If the gas instead comes from an external source, then our results suggest that this is more likely acquired outside the cluster environment, where galaxy–galaxy interactions more commonly take place. We analyse the Tully–Fisher relation of the ETGs with gas discs, and compare them to EDisCS spirals. Taking a matched range of redshifts, MB < −20, and excluding galaxies with large velocity uncertainties, we find that, at fixed rotational velocity, ETGs are 1.7 mag fainter in MB than spirals. At fixed stellar mass, we also find that ETGs have systematically lower specific star formation rates than spirals. This study constitutes an important step forward towards the understanding of the evolution of the complex ISM in ETGs by significantly extending the look-back-time baseline explored so far. Oxford University Press 2014-05-01 Article PeerReviewed Jaffe, Yara L., Aragón-Salamanca, Alfonso, Ziegler, Bodo, Kuntschner, Harald, Zaritsky, Dennis, Rudnick, Gregory, Poggianti, Bianca M., Hoyos, Carlos, Halliday, Claire and Demarco, Ricardo (2014) Ionized gas discs in elliptical and S0 galaxies at z < 1. Monthly Notices of the Royal Astronomical Society, 440 (4). pp. 3491-3502. ISSN 0035-8711 galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: ISM galaxies: kinematics and dynamics https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stu507 doi:10.1093/mnras/stu507 doi:10.1093/mnras/stu507 |
| spellingShingle | galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: ISM galaxies: kinematics and dynamics Jaffe, Yara L. Aragón-Salamanca, Alfonso Ziegler, Bodo Kuntschner, Harald Zaritsky, Dennis Rudnick, Gregory Poggianti, Bianca M. Hoyos, Carlos Halliday, Claire Demarco, Ricardo Ionized gas discs in elliptical and S0 galaxies at z < 1 |
| title | Ionized gas discs in elliptical and S0 galaxies at z < 1 |
| title_full | Ionized gas discs in elliptical and S0 galaxies at z < 1 |
| title_fullStr | Ionized gas discs in elliptical and S0 galaxies at z < 1 |
| title_full_unstemmed | Ionized gas discs in elliptical and S0 galaxies at z < 1 |
| title_short | Ionized gas discs in elliptical and S0 galaxies at z < 1 |
| title_sort | ionized gas discs in elliptical and s0 galaxies at z < 1 |
| topic | galaxies: elliptical and lenticular cD galaxies: evolution galaxies: formation galaxies: ISM galaxies: kinematics and dynamics |
| url | https://eprints.nottingham.ac.uk/42055/ https://eprints.nottingham.ac.uk/42055/ https://eprints.nottingham.ac.uk/42055/ |