An ultra diffuse galaxy in the NGC 5846 group from the VEGAS survey
Journal
Date Issued
2019
Author(s)
Forbes, Duncan A.
•
Gannon, Jonah
•
Couch, Warrick J.
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•
•
•
•
Abstract
Context. Many ultra diffuse galaxies (UDGs) have now been identified in clusters of galaxies. However, the number of nearby UDGs suitable for detailed follow-up remain rare.
Aims: Our aim is to begin to identify UDGs in the environments of nearby bright early-type galaxies from the VEGAS survey.
Methods: Here we use a deep g band image of the NGC 5846 group, taken as part of the VEGAS survey, to search for UDGs.
Results: We found one object with properties of a UDG if it associated with the NGC 5846 group, which seems likely. The galaxy, we name NGC 5846_UDG1, has an absolute magnitude of Mg = -14.2, corresponding to a stellar mass of ∼108M☉. It also reveals a system of compact sources which are likely globular clusters. Based on the number of globular clusters detected we estimate a halo mass that is greater than 8 × 1010M☉ for UDG1.
Aims: Our aim is to begin to identify UDGs in the environments of nearby bright early-type galaxies from the VEGAS survey.
Methods: Here we use a deep g band image of the NGC 5846 group, taken as part of the VEGAS survey, to search for UDGs.
Results: We found one object with properties of a UDG if it associated with the NGC 5846 group, which seems likely. The galaxy, we name NGC 5846_UDG1, has an absolute magnitude of Mg = -14.2, corresponding to a stellar mass of ∼108M☉. It also reveals a system of compact sources which are likely globular clusters. Based on the number of globular clusters detected we estimate a halo mass that is greater than 8 × 1010M☉ for UDG1.
Volume
626
Start page
A66
Issn Identifier
0004-6361
Ads BibCode
2019A&A...626A..66F
Rights
open.access
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