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The properties of bright globular clusters, ultra-compact dwarfs and dwarf nuclei in the Virgo core: hints on origin of ultra-compact dwarf galaxies (UCDs)

Published online by Cambridge University Press:  30 October 2019

Chengze Liu Open the ORCID record for Chengze Liu [Opens in a new window] ,
Eric W. Peng ,
Patrick Côté ,
Hong-Xin Zhang ,
Laura Ferrarese ,
Andrés Jordán ,
J. Christopher Mihos ,
Roberto P. Muñoz ,
Thomas H. Puzia  and
Ariane Lançon Open the ORCID record for Ariane Lançon [Opens in a new window]
...Show all authors
Chengze Liu
Affiliation:
Department of Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China, email: [email protected]
Eric W. Peng
Affiliation:
Department of Astronomy, Peking University, Beijing 100871, China
Patrick Côté
Affiliation:
NRC Herzberg Astronomy and Astrophysics Research Centre, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
Hong-Xin Zhang
Affiliation:
Department of Astronomy, University of Science and Technology of China, Hefei 230026, China
Laura Ferrarese
Affiliation:
NRC Herzberg Astronomy and Astrophysics Research Centre, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
Andrés Jordán
Affiliation:
Institute of Astrophysics, Pontificia Universidad Católica de Chile, 7820436 Macul, Santiago, Chile
J. Christopher Mihos
Affiliation:
Department of Astronomy, Case Western Reserve University, Cleveland, OH, USA
Roberto P. Muñoz
Affiliation:
Institute of Astrophysics, Pontificia Universidad Católica de Chile, 7820436 Macul, Santiago, Chile
Thomas H. Puzia
Affiliation:
Institute of Astrophysics, Pontificia Universidad Católica de Chile, 7820436 Macul, Santiago, Chile
Ariane Lançon
Affiliation:
Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l’Université, F-67000 Strasbourg, France
Stephen Gwyn
Affiliation:
NRC Herzberg Astronomy and Astrophysics Research Centre, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
Jean-Charles Cuillandre
Affiliation:
AIM Paris Saclay, CNRS/INSU, CEA/Irfu, Université Paris Diderot, Orme des Merisiers, F-91191 Gif-sur-Yvette Cedex, France
John P. Blakeslee
Affiliation:
NRC Herzberg Astronomy and Astrophysics Research Centre, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
Alessandro Boselli
Affiliation:
Aix-Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Patrick R. Durrell
Affiliation:
Department of Physics and Astronomy, Youngstown State University, One University Plaza, Youngstown, OH 44555, USA
Pierre-Alain Duc
Affiliation:
Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l’Université, F-67000 Strasbourg, France
Puragra Guhathakurta
Affiliation:
UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
Lauren A. MacArthur
Affiliation:
Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
Simona Mei
Affiliation:
GEPI, Observatoire de Paris, CNRS, University of Paris Diderot, Paris Sciences et Lettres (PSL), 61, Avenue de l’Observatoire 75014, ParisFrance University of Paris Denis Diderot, University of Paris Sorbonne Cité (PSC), 75205 Paris Cedex 13, France California Institute of Technology, Pasadena, CA 91125, USA
Rubén Sánchez-Janssen
Affiliation:
UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ, UK
Haiguang Xu
Affiliation:
Department of Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China, email: [email protected]
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Abstract

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Based on the data from the Next Generation Virgo cluster Survey (NGVS), we statistically study the photometric properties of globular clusters (GCs), ultra-compact dwarfs (UCDs) and dwarf nuclei in the Virgo core (M87) region. We found an obvious negative color (g - z) gradient in GC system associate with M87, i.e. GCs in the outer regions are bluer. However, such color gradient does not exist in UCD system, neither in dwarf nuclei system around M87. In addition, we found that many UCDs are surrounded by extended, low surface brightness envelopes. The dwarf nuclei and UCDs show different spatial distributions from GCs, with dwarf nuclei and UCDs (especially for the UCDs with visible envelopes) lying at larger distances to the Virgo center. These results support the view that UCDs (at least for a fraction of UCDs) are more tied to dwarf nuclei than to GCs.

Keywords

galaxies: dwarfgalaxies: nucleigalaxies: star clusters: generalglobular clusters: general
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. 384 - 388
Copyright
© International Astronomical Union 2019 

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