The integrated properties of the CALIFA galaxies: Model-derived galaxy parameters and quenching of star formation
| Autor: | Bitsakis, T., Sanchez, S. F., Ciesla, L., Bonfini, P., Charmandaris, V., Sodi, B. Cervantes, Maragkoudakis, A., Diaz-Santos, T., Zezas, A. |
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| Rok vydání: | 2018 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/mnras/sty2857 |
| Popis: | We present a study of the integrated properties of the 835 galaxies in the CALIFA survey. To derive the main physical parameters of the galaxies we have fitted their UV-to-IR spectral energy distributions (SED) with sets of theoretical models using CIGALE. We perform a comparison of the integrated galaxy parameters derived from multi-band SED fitting with those obtained from modelling the Integral Field Unit (IFU) spectra and show the clear advantage of using the SED-derived star formation rates (SFR). A detailed analysis of galaxies in the SFR/Mstar plane as a function of their properties reveals that quenching of star formation is caused by a combination of gas deficiency and the inefficiency of the existing gas to form new stars. Exploring the plausible mechanisms that could produce this effect, we find a strong correlation with galaxy morphology and the build-up of central bulge. On the other hand, the presence of AGN and/or a stellar bar, as well as the local environment have only temporal effects on the current star formation, a result also consistent with their model-derived star formation histories. Comment: Accepted for publication in MNRAS |
| Databáze: | arXiv |
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