Abstract Details
| Name: Koshy George Affiliation: Indian institute of Astrophysics Conference ID: ASI2018_1129 Title : Star formation influence the Fundamental Plane of early-type galaxies Authors and Co-Authors : NIL Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : The passively evolving "red and dead" early-type galaxies fall on a Fundamental Plane in the three dimensional phase space of galaxy size, surface brightness and velocity dispersion. The intrinsic scatter of galaxies on the plane is attributed to variations in the total mass-to-light ratio, which is highly sensitive to the recent/ongoing star formation in the galaxy. We test this hypothesis by constructing the Fundamental Plane of ~5000 early-type galaxies in the local Universe and analysing the position of star forming population of early-type galaxies. The star forming early-type galaxies are found to be deviated from the plane with a dependence on the optical colour of the galaxy. The integrated stellar population analysis using the galaxy spectra reveals that the age of the stellar population dictates the position of galaxies on the Fundamental Plane. The result and its implication in the context of the observed stellar mass growth in early-type galaxies will be discussed. |