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A New Reservoir of Dwarf Galaxy Candidates in the Centaurus A Group

Published online by Cambridge University Press:  30 October 2019

Matthew A. Taylor Open the ORCID record for Matthew A. Taylor [Opens in a new window] ,
Paul Eigenthaler ,
Thomas H. Puzia ,
Roberto P. Muñoz ,
Karen X. Ribbeck ,
Hong-Xin Zhang ,
Yasna Ordenes-Briceño  and
Mia Sauda Bovill
Matthew A. Taylor
Affiliation:
Gemini Observatory, Northern Operations Center, 670 North A’ohoku Place, Hilo, HI 96720-1906, USA email: [email protected]
Paul Eigenthaler
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Thomas H. Puzia
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Roberto P. Muñoz
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Karen X. Ribbeck
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Hong-Xin Zhang
Affiliation:
CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, China
Yasna Ordenes-Briceño
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Mia Sauda Bovill
Affiliation:
Texas Christian University, Dept. of Physics and Astronomy, 2800 S. University Dr., Fort Worth, TX 76129, USA
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Abstract

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We have searched optical u′g′r′i′z′ imaging of 22 deg2 centred on the nearby giant elliptical galaxy NGC 5128 for new dwarf galaxies in the Centaurus A group. We report 45 promising new candidates, which are broadly consistent with the properties of nearby dwarf spheroidal galaxies and extend the size-luminosity relation toward fainter total luminosities and smaller sizes for known dwarf galaxies outside the Local Group (LG). Altogether, these new results show NGC 5128 to be the host of a large reservoir of low-mass dwarf galaxies that is at least as rich as that of the LG and is ripe for detailed follow-up observations.

Keywords

galaxies: star clustersgalaxies: dwarfgalaxies: ellipticalgalaxies: individual (NGC5128)galaxies: interactions
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. 353 - 356
Copyright
© International Astronomical Union 2019 

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