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Dwarf Galaxies in the Core of Coma Cluster

Published online by Cambridge University Press:  30 October 2019

S. N. Hasan ,
Priya Shah  and
P. Nagamani
S. N. Hasan
Affiliation:
Department of Mathematics, Maulana Azad National Urdu University, Gachibowli, Hyderabad 500 032, India email: [email protected]
Priya Shah
Affiliation:
Department of Physics, Maulana Azad National Urdu University, Gachibowli, Hyderabad 500 032, India email: [email protected]
P. Nagamani
Affiliation:
Department of Astronomy, Osmania University, Hyderabad 500 007, India
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Abstract

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Dwarf galaxies constitute 18% of the galaxies in the core of the Coma Cluster. We present the correlation between structural properties and morphology of galaxies in the central region of Coma Cluster for 221 objects within the apparent magnitude range m < 19.5. The data is taken from the HST/ACS Coma Cluster Treasury Survey. For cluster membership we have used photometric redshifts and spectroscopic redshifts from literature. From the investigation of correlations of effective radius, Sersic index, absolute magnitude and bulge to total light ratio, we find the galaxies are distributed as follows: dwarfs 18%, E/SO 33%, SO 22%, Sb & Sb0 17% and 10% are Spirals+Irregulars+Ring. We found that multiple component fits are best for giants and the single Sersic fit is best for dwarfs & spiral galaxies. We shall try to explain why the single Sersic fit is best for dwarfs and what kind of stellar orbits do they correspond to using the bulge Sersic index of dwarfs.

Keywords

galaxies: clusters: individual (Coma)dwarfphotometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 417 - 419
Copyright
© International Astronomical Union 2019 

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