English

An Ultra diffuse Galaxy in the NGC 5846 group from the VEGAS survey

Astrophysics of Galaxies 2019-06-19 v1

Abstract

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. Our aim is to begin to identify UDGs in the environments of nearby bright early-type galaxies from the VEGAS survey. Here we use a deep g band image of the NGC 5846 group, taken as part of the VEGAS survey, to search for UDGs. 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_g = -14.2, corresponding to a stellar mass of \sim108^8 M_{\odot}. 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×\times1010^{10} M_{\odot} for UDG1.

Keywords

Cite

@article{arxiv.1905.06415,
  title  = {An Ultra diffuse Galaxy in the NGC 5846 group from the VEGAS survey},
  author = {Duncan A. Forbes and Jonah Gannon and Warrick J Couch and Enrichetta Iodice and Marilena Spavone and Michele Cantiello and Nicola Napolitano and Pietro Schipani},
  journal= {arXiv preprint arXiv:1905.06415},
  year   = {2019}
}

Comments

5 pages, 4 figures, accepted for publication in A&A