論文摘要

Size-Mass Relations of Galaxies from Sloan Digital Sky Survey

[ Poster ]

Shemile Poblete (Institute of Astronomy, National Central University, Taoyuan City, Taiwan (R.O.C.)); Yong Tian (Institute of Astronomy, National Central University, Taoyuan City, Taiwan (R.O.C.)); Chung-Ming Ko (Institute of Astronomy, National Central University, Taoyuan City, Taiwan (R.O.C.) and Department of Physics and Center of Complex Systems, National Central University, Taoyuan City,Taiwan (R.O.C.))

Using stellar mass and effective radius, we assess the size-mass relation of around 68,000 galaxies from Sloan Digital Sky Survey Data Release 15. We classify these galaxies with respect to their morphology: spiral and elliptical. Both types of galaxies show different size-mass relation. We compare these relations to the relations of compact objects such as globular clusters and ultra-compact dwarfs. The compact objects lie on the extension of best fit size-mass relation of elliptical galaxies but not of spiral galaxies.