تقرير
The star formation history and the nature of the mass-metallicity relation of passive galaxies at 1.0
التفاصيل البيبلوغرافية
العنوان:
The star formation history and the nature of the mass-metallicity relation of passive galaxies at 1.0
المؤلفون:
Saracco, Paolo, La Barbera, Francesco, De Propris, Roberto, Bevacqua, Davide, Marchesini, Danilo, De Lucia, Gabriella, Fontanot, Fabio, Hirschmann, Michaela, Nonino, Mario, Pasquali, Anna, Spiniello, Chiara, Tortora, Crescenzo
سنة النشر:
2023
المجموعة:
Astrophysics
مصطلحات موضوعية:
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
الوصف:
We derived stellar ages and metallicities [Z/H] for $\sim$70 passive early type galaxies (ETGs) selected from VANDELS survey over the redshift range 1.0$<$$z$$<$1.4 and stellar mass range 10$<$log(M$_*$/M$_\odot$)$<$11.6. We find significant systematics in their estimates depending on models and wavelength ranges considered. Using the full-spectrum fitting technique, we find that both [Z/H] and age increase with mass as for local ETGs. Age and metallicity sensitive spectral indices independently confirm these trends. According to EMILES models, for 67 per cent of the galaxies we find [Z/H]$>$0.0, a percentage which rises to $\sim$90 per cent for log(M$_*$/M$_\odot$)$>$11 where the mean metallicity is [Z/H]=0.17$\pm$0.1. A comparison with homogeneous measurements at similar and lower redshift does not show any metallicity evolution over the redshift range 0.0$11.0 host stellar populations with [Z/H]>0.05, formed over short timescales ($\Delta{t50}$$<$1 Gyr) at early epochs (t$_{form}$$<$2 Gyr), implying high star formation rates (SFR$>$100 M$_\odot$/yr) in high mass density regions (log($\Sigma_{1kpc}$)$>$10 M$_\odot$/kpc$^2$). This sharp picture tends to blur at lower masses: log(M$_*$/M$_\odot$)$\sim$10.6 galaxies can host either old stars with [Z/H]$<$0.0 or younger stars with [Z/H]$>$0.0, depending on the duration ($\Delta{t50}$) of the SF. The relations between galaxy mass, age and metallicities are therefore largely set up ab initio as part of the galaxy formation process. Mass, SFR and SF time-scale all contribute to shape up the stellar mass-metallicity relation with the mass that modulates metals retention.
Comment: 18 pages + Appendix, 16 figures, 5 tables. Accepted for publication in MNRAS
نوع الوثيقة:
Working Paper
DOI:
10.1093/mnras/stad241
الوصول الحر:
http://arxiv.org/abs/2301.09653Test
رقم الانضمام:
edsarx.2301.09653
قاعدة البيانات:
arXiv
| العنوان: | The star formation history and the nature of the mass-metallicity relation of passive galaxies at 1.0 |
|---|---|
| المؤلفون: | Saracco, Paolo, La Barbera, Francesco, De Propris, Roberto, Bevacqua, Davide, Marchesini, Danilo, De Lucia, Gabriella, Fontanot, Fabio, Hirschmann, Michaela, Nonino, Mario, Pasquali, Anna, Spiniello, Chiara, Tortora, Crescenzo |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We derived stellar ages and metallicities [Z/H] for $\sim$70 passive early type galaxies (ETGs) selected from VANDELS survey over the redshift range 1.0$<$$z$$<$1.4 and stellar mass range 10$<$log(M$_*$/M$_\odot$)$<$11.6. We find significant systematics in their estimates depending on models and wavelength ranges considered. Using the full-spectrum fitting technique, we find that both [Z/H] and age increase with mass as for local ETGs. Age and metallicity sensitive spectral indices independently confirm these trends. According to EMILES models, for 67 per cent of the galaxies we find [Z/H]$>$0.0, a percentage which rises to $\sim$90 per cent for log(M$_*$/M$_\odot$)$>$11 where the mean metallicity is [Z/H]=0.17$\pm$0.1. A comparison with homogeneous measurements at similar and lower redshift does not show any metallicity evolution over the redshift range 0.0 Comment: 18 pages + Appendix, 16 figures, 5 tables. Accepted for publication in MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stad241 |
| الوصول الحر: | http://arxiv.org/abs/2301.09653Test |
| رقم الانضمام: | edsarx.2301.09653 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stad241 |
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