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名稱Title
2020天文年會
中研院天文所 國際會議廳

論文摘要

Radial Acceleration Relation of Elliptical Galaxies in Sloan Digital Sky Survey DR15

[ Poster ]

Arcy Layne Sace (Institute of Astronomy, National Central University, Taoyuan City, Taiwan (R.O.C.)) ; Chung-Ming Ko (Department of Physics and Center of Complex Systems, National Central University, Taoyuan City, Taiwan (R.O.C.))

Radial Acceleration Relation (RAR) is a relation between the observed acceleration of a galaxy and the acceleration due to its baryonic matter. RAR has been studied extensively in spiral galaxies. In this contribution, we study RAR of elliptical galaxies. We select data of elliptical galaxies from SDSS DR15 through Galaxy Zoo. Elliptical galaxies are pressure support systems, and we use Jeans equation to study their velocity dispersion in dark matter and Modified Newtonian Dynamics (MOND) paradigms. We obtain the RAR of the sample elliptical galaxies at their effective radius and infer the acceleration scale of MOND using Bekenstein form.