MS. SHEELU ABRAHAM

We present a study on the stellar mass dependence of the evolution of bulges of 316 galaxies in SDSS r-band using bulge-disc-bar correlations. The structural parameters for the bulge, disc and bar of the galaxy are extracted using GALFIT, a 2-D image decomposition code. Our research group estimated total stellar mass SFR and specific SFR using the multi-wavelength (UV/Optical/Near-IR/Mid-IR) data that we have on these S0 galaxies. We show that the various scaling relations involving bulge and disc parameters show dependence on stellar mass which confirms our previous results. The fraction of barred galaxies, which comprises 17% of our S0 galaxies, also shows mass dependence. i.e. less massive S0 galaxies are more likely to host bars than massive S0 galaxies. These results provide evidence that the formation history of S0 galaxies follows two very different routes and which depends primarily on the mass of the galaxy though the environment also plays a significant role.