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Dark matter content and dynamical masses of ultra-diffuse galaxies in the Coma cluster
Igor Chilingarian, Kirill Grishin, Anton V. Afanasiev +6
Ultra-diffuse galaxies (UDGs) are spatially extended, low surface brightness stellar systems with regular elliptical-like morphology found in large numbers in galaxy clusters and g…
Dwarf early-type galaxies in the Coma cluster: internal dynamics, stellar populations
Igor Chilingarian, Kirill Grishin, Anton V. Afanasiev +6
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. Fr…
KDG 64: a large dwarf spheroidal or a small ultradiffuse satellite of Messier 81
Anton V. Afanasiev, Igor V. Chilingarian, Kirill A. Grishin +5
Low-mass early-type galaxies, including dwarf spheroidals (dSph) and brighter dwarf ellipticals (dE), dominate the galaxy population in groups and clusters. Recently, an additional…
Transforming gas-rich low-mass disky galaxies into ultra-diffuse galaxies by ram pressure
Kirill Grishin, Igor Chilingarian, Anton Afanasiev +4
Faint extended elliptically-shaped ultra-diffuse galaxies and slightly brighter and more compact dwarf elliptical and lenticular stellar systems are common in galaxy clusters. Thei…
The Velocity Dispersion Function for Quiescent Galaxies in Nine Strong-Lensing Clusters
Jubee Sohn, Daniel G. Fabricant, Margaret J. Geller +2
We measure the central stellar velocity dispersion function for quiescent galaxies in a set of nine northern clusters in the redshift range and with strong lensin…
Evolutionary link between ultra-diffuse galaxies and dwarf early-type galaxies
Igor V. Chilingarian, Kirill A. Grishin, Anton V. Afanasiev +2
Spectroscopic studies of low-luminosity early-type galaxies are essential to understand their origin and evolution but remain challenging because of low surface brightness levels.…