Galaxies at the extremes : ultra-diffuse galaxies in the Virgo Cluster

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DOIResolve DOI: http://doi.org/10.1088/2041-8205/809/2/L21
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume809
Issue2
Article numberL21
Physical description7 p.
Subjectgalaxies: clusters: individual (Virgo); galaxies: evolution; galaxies: fundamental parameters; galaxies: structure
AbstractWe report the discovery of three large (R29 ≳ 1′) extremely low surface brightness (LSB; μV,0 ≈ 27.0) galaxies identified using our deep, wide-field imaging of the Virgo Cluster from the Burrell Schmidt telescope. Complementary data from the Next Generation Virgo Cluster Survey do not resolve red giant branch stars in these objects down to i = 24, yielding a lower distance limit of 2.5 Mpc. At the Virgo distance, these objects have halflight radii 3-10 kpc and luminosities LV = 2-9 × 107 L⊙. These galaxies are comparable in size but lower in surface brightness than the large ultradiffuse LSB galaxies recently identified in the Coma cluster, and are located well within Virgo's virial radius; two are projected directly on the cluster core. One object appears to be a nucleated LSB in the process of being tidally stripped to form a new Virgo ultracompact dwarf galaxy. The others show no sign of tidal disruption, despite the fact that such objects should be most vulnerable to tidal destruction in the cluster environment. The relative proximity of Virgo makes these objects amenable to detailed studies of their structural properties and resolved stellar populations. They thus provide an important new window onto the connection between cluster environment and galaxy evolution at the extremes.
Publication date
PublisherIOP Publishing for the American Astronomical Society
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21277014
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Record identifier643f24c0-f461-4993-af7d-3dc30c9d5f74
Record created2015-11-10
Record modified2016-12-13
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