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Author (up) Liu, C.Z.; Cote, P.; Peng, E.W.; Roediger, J.; Zhang, H.X.; Ferrarese, L.; Sanchez-Janssen, R.; Guhathakurta, P.; Yang, X.H.; Jing, Y.P.; Alamo-Martinez, K.; Blakeslee, J.P.; Boselli, A.; Cuilandre, J.C.; Duc, P.A.; Durrell, P.; Gwyn, S.; Jordan, A.; Ko, Y.; Lancon, A.; Lim, S.; Longobardi, A.; Mei, S.; Mihos, J.C.; Munoz, R.; Powalka, M.; Puzia, T.; Spengler, C.; Toloba, E.
Title The Next Generation Virgo Cluster Survey. XXXIV. Ultracompact Dwarf Galaxies in the Virgo Cluster Type
Year 2020 Publication Astrophysical Journal Supplement Series Abbreviated Journal Astrophys. J. Suppl. Ser.
Volume 250 Issue 1 Pages 28 pp
Keywords Ultracompact dwarf galaxies; Globular star clusters; Galaxy nuclei; Dwarf elliptical galaxies; Virgo Cluster; Galaxy formation
Abstract We present a study of ultracompact dwarf (UCD) galaxies in the Virgo cluster based mainly on imaging from the Next Generation Virgo Cluster Survey (NGVS). Using similar to 100 deg(2) of u*giz imaging, we have identified more than 600 candidate UCDs, from the core of Virgo out to its virial radius. Candidates have been selected through a combination of magnitudes, ellipticities, colors, surface brightnesses, half-light radii, and, when available, radial velocities. Candidates were also visually validated from deep NGVS images. Subsamples of varying completeness and purity have been defined to explore the properties of UCDs and compare to those of globular clusters and the nuclei of dwarf galaxies with the aim of delineating the nature and origins of UCDs. From a surface density map, we find the UCDs to be mostly concentrated within Virgo's main subclusters, around its brightest galaxies. We identify several subsamples of UCDs-i.e., the brightest, largest, and those with the most pronounced and/or asymmetric envelopes-that could hold clues to the origin of UCDs and possible evolutionary links with dwarf nuclei. We find some evidence for such a connection from the existence of diffuse envelopes around some UCDs and comparisons of radial distributions of UCDs and nucleated galaxies within the cluster.
Address [Liu, Chengze; Yang, Xiaohu; Jing, Yipeng] Shanghai Jiao Tong Univ, Sch Phys & Astron, Dept Astron, Shanghai 200240, Peoples R China, Email: czliu@sjtu.edu.cn
Corporate Author Thesis
Publisher Iop Publishing Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0067-0049 ISBN Medium
Area Expedition Conference
Notes WOS:000570603400001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1251
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