University of Oulu

Wittmann, C., Kotulla, R., Lisker, T., Grebel, E. K., Conselice, C. J., Janz, J., & Penny, S. J. (2019). A Catalog of Galaxies in the Direction of the Perseus Cluster. The Astrophysical Journal Supplement Series, 245(1), 10.

A catalog of galaxies in the direction of the Perseus cluster

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Author: Wittmann, Carolin1; Kotulla, Ralf2; Lisker, Thorsten1;
Organizations: 1Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhofstraße 12-14, D-69120 Heidelberg, Germany
2Department of Astronomy, University of Wisconsin at Madison, 475 North Charter Street, Madison, WI 53706-1582, USA
3School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
4Astronomy Research Unit, University of Oulu, Pentti Kaiteran katu 1, FI-90014 Oulu, Finland
5Finnish Centre of Astronomy with ESO (FINCA), University of Turku, Vaisalantie 20, FI-21500 Piikkio, Finland
6Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth PO1 3FX, UK
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.5 MB)
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Language: English
Published: IOP Publishing, 2019
Publish Date: 2020-03-27


We present a catalog of 5437 morphologically classified sources in the direction of the Perseus galaxy cluster core, among them 496 early-type low-mass galaxy candidates. The catalog is primarily based on V-band imaging data acquired with the William Herschel Telescope, which we used to conduct automated source detection and derive photometry. We additionally reduced archival Subaru multiband imaging data in order to measure aperture colors and perform a morphological classification, benefiting from 0farcs5 seeing conditions in the r-band data. Based on morphological and color properties, we extracted a sample of early-type low-mass galaxy candidates with absolute V-band magnitudes in the range of −10 to −20 mag. In the color–magnitude diagram, the galaxies are located where the red sequence for early-type cluster galaxies is expected, and they lie on the literature relation between absolute magnitude and Sérsic index. We classified the early-type dwarf candidates into nucleated and nonnucleated galaxies. For the faint candidates, we found a trend of increasing nucleation fraction toward brighter luminosity or higher surface brightness, similar to what is observed in other nearby galaxy clusters. We morphologically classified the remaining sources as likely background elliptical galaxies, late-type galaxies, edge-on disk galaxies, and likely merging systems and discussed the expected contamination fraction through non-early-type cluster galaxies in the magnitude-size surface brightness parameter space. Our catalog reaches its 50% completeness limit at an absolute V-band luminosity of −12 mag and a V-band surface brightness of 26 mag arcsec⁻². This makes it the largest and deepest catalog with coherent coverage compared to previous imaging studies of the Perseus cluster.

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Series: Astrophysical journal. Supplement series
ISSN: 0067-0049
ISSN-E: 1538-4365
ISSN-L: 0067-0049
Volume: 245
Issue: 1
Article number: 10
DOI: 10.3847/1538-4365/ab4998
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: C.W. is supported by the Deutsche Forschungsgemeinschaft (DFG; German Research Foundation) through project 394551440. R.K. gratefully acknowledges partial funding support from the National Science Foundation under project AST-1664362 and the National Aeronautics and Space Administration under project 80NSSC18K1498.
Copyright information: © 2019. The American Astronomical Society. All rights reserved. Published in this repository with the kind permission of the publisher.