The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies
We explore stellar population properties separately in the bulge and the disk of double-component cluster galaxies to shed light on the formation of lenticular galaxies in dense environments. We study eight low-redshift clusters from the Sydney-AAO Multi-object Integral field (SAMI) Galaxy Survey, u...
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ftdatacite:10.48550/arxiv.2011.04873 2023-05-15T18:11:52+02:00 The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies Barsanti, S. Owers, M. S. McDermid, R. M. Bekki, K. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Cortese, L. Croom, S. M. Foster, C. Lawrence, J. S. López-Sánchez, A. R. Oh, S. Robotham, A. S. G. Scott, N. Sweet, S. M. van de Sande, J. 2020 https://dx.doi.org/10.48550/arxiv.2011.04873 https://arxiv.org/abs/2011.04873 unknown arXiv https://dx.doi.org/10.3847/1538-4357/abc956 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2020 ftdatacite https://doi.org/10.48550/arxiv.2011.04873 https://doi.org/10.3847/1538-4357/abc956 2022-03-10T15:06:02Z We explore stellar population properties separately in the bulge and the disk of double-component cluster galaxies to shed light on the formation of lenticular galaxies in dense environments. We study eight low-redshift clusters from the Sydney-AAO Multi-object Integral field (SAMI) Galaxy Survey, using 2D photometric bulge-disk decomposition in the $g$, $r$ and $i$-bands to characterize galaxies. For 192 double-component galaxies with $M_{*}>10^{10~}M_{\odot}$ we estimate the color, age and metallicity of the bulge and the disk. The analysis of the $g-i$ colors reveals that bulges are redder than their surrounding disks with a median offset of 0.12$\pm$0.02 mag, consistent with previous results. To measure mass-weighted age and metallicity we investigate three methods: (i) one based on galaxy stellar mass weights for the two components, (ii) one based on flux weights and (iii) one based on radial separation. The three methods agree in finding 62% of galaxies having bulges that are 2-3 times more metal-rich than the disks. Of the remaining galaxies, 7% have bulges that are more metal-poor than the disks, while for 31% the bulge and disk metallicities are not significantly different. We observe 23% of galaxies being characterized by bulges older and 34% by bulges younger with respect to the disks. The remaining 43% of galaxies have bulges and disks with statistically indistinguishable ages. Redder bulges tend to be more metal-rich than the disks, suggesting that the redder color in bulges is due to their enhanced metallicity relative to the disks instead of differences in stellar population age. : 38 pages (including 5 pages of appendices), 23 Figures, 5 Tables. Accepted for publication in ApJ Article in Journal/Newspaper sami DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
spellingShingle |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences Barsanti, S. Owers, M. S. McDermid, R. M. Bekki, K. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Cortese, L. Croom, S. M. Foster, C. Lawrence, J. S. López-Sánchez, A. R. Oh, S. Robotham, A. S. G. Scott, N. Sweet, S. M. van de Sande, J. The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies |
topic_facet |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
We explore stellar population properties separately in the bulge and the disk of double-component cluster galaxies to shed light on the formation of lenticular galaxies in dense environments. We study eight low-redshift clusters from the Sydney-AAO Multi-object Integral field (SAMI) Galaxy Survey, using 2D photometric bulge-disk decomposition in the $g$, $r$ and $i$-bands to characterize galaxies. For 192 double-component galaxies with $M_{*}>10^{10~}M_{\odot}$ we estimate the color, age and metallicity of the bulge and the disk. The analysis of the $g-i$ colors reveals that bulges are redder than their surrounding disks with a median offset of 0.12$\pm$0.02 mag, consistent with previous results. To measure mass-weighted age and metallicity we investigate three methods: (i) one based on galaxy stellar mass weights for the two components, (ii) one based on flux weights and (iii) one based on radial separation. The three methods agree in finding 62% of galaxies having bulges that are 2-3 times more metal-rich than the disks. Of the remaining galaxies, 7% have bulges that are more metal-poor than the disks, while for 31% the bulge and disk metallicities are not significantly different. We observe 23% of galaxies being characterized by bulges older and 34% by bulges younger with respect to the disks. The remaining 43% of galaxies have bulges and disks with statistically indistinguishable ages. Redder bulges tend to be more metal-rich than the disks, suggesting that the redder color in bulges is due to their enhanced metallicity relative to the disks instead of differences in stellar population age. : 38 pages (including 5 pages of appendices), 23 Figures, 5 Tables. Accepted for publication in ApJ |
format |
Article in Journal/Newspaper |
author |
Barsanti, S. Owers, M. S. McDermid, R. M. Bekki, K. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Cortese, L. Croom, S. M. Foster, C. Lawrence, J. S. López-Sánchez, A. R. Oh, S. Robotham, A. S. G. Scott, N. Sweet, S. M. van de Sande, J. |
author_facet |
Barsanti, S. Owers, M. S. McDermid, R. M. Bekki, K. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Cortese, L. Croom, S. M. Foster, C. Lawrence, J. S. López-Sánchez, A. R. Oh, S. Robotham, A. S. G. Scott, N. Sweet, S. M. van de Sande, J. |
author_sort |
Barsanti, S. |
title |
The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies |
title_short |
The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies |
title_full |
The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies |
title_fullStr |
The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies |
title_full_unstemmed |
The SAMI Galaxy Survey: bulge and disk stellar population properties in cluster galaxies |
title_sort |
sami galaxy survey: bulge and disk stellar population properties in cluster galaxies |
publisher |
arXiv |
publishDate |
2020 |
url |
https://dx.doi.org/10.48550/arxiv.2011.04873 https://arxiv.org/abs/2011.04873 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.3847/1538-4357/abc956 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2011.04873 https://doi.org/10.3847/1538-4357/abc956 |
_version_ |
1766184477378215936 |