Dwarf early-type galaxies in the Coma cluster: internal dynamics, stellar populations

Author:

Igor Chilingarian, Kirill Grishin, Anton V. Afanasiev, Anton Mironov, Daniel Fabricant, Sean Moran, Nelson Caldwell, Ivan Katkov, Irina Ershova

Keyword:

Astrophysics, Astrophysics of Galaxies, Astrophysics of Galaxies (astro-ph.GA)

journal:

date:

2023-06-12 16:00:00

Abstract

We present preliminary results from our spectroscopic survey of low-luminosity early-type galaxies in the Coma cluster conducted with the Binospec spectrograph at the 6.5~m MMT. From spatially-resolved profiles of internal kinematics and stellar population properties complemented with high-resolution images, we placed several low-luminosity dEs on the fundamental plane in the low-luminosity extension of the available literature data. We also discovered unusual kpc-sized kinematically-decoupled cores in several dwarf galaxies, which had been probably formed before these galaxies entered the cluster.

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