Abstract Details
| Name: Omkar Suresh Bait Affiliation: National Center for Radio Astrophysics-TIFR Conference ID: ASI2016_671 Title : SED fitting for S0 galaxies using GALEX-SDSS-2MASS-WISE photometry Authors and Co-Authors : Sudhanshu Barway(SAAO) Yogesh Wadadekar(NCRA-TIFR) Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : We present results from fits to the spectral energy distribution (SED) of a sample of S0 galaxies using panchromatic data from far UV to mid-IR from GALEX-SDSS-2MASS-WISE photometry. We use the publicly available code MAGPHYS to fit the SED and to estimate various physical parameters like stellar mass, star formation rate, mass weighted stellar age, metalicity etc. We find that S0 galaxies can be classified in two types based on their stellar mass. The star formation history of these two types of S0 are very different. High mass S0’s have formed by major mergers at roughly the same epoch around z ∼ 2 after which star formation is rapidly quenched. On the other hand, low mass S0’s are still seeing some star formation although the rate is decreasing, through various processes like ram pressure stripping for galaxies in clusters and bar driven instabilities in field galaxies. |