Volume 626, June 2019
|Number of page(s)||4|
|Published online||13 June 2019|
An ultra diffuse galaxy in the NGC 5846 group from the VEGAS survey
Centre for Astrophysics & Supercomputing, Swinburne University, Hawthorn, VIC 3122, Australia
2 INAF-Astronomical Observatory of Capodimonte, Salita Moiariello 16, 80131 Naples, Italy
3 INAF Astronomical Observatory of Abruzzo, Via Maggini snc, 64100 Teramo, Italy
4 School of Physics and Astronomy, Sun Yat-sen University Zhuhai Campus, 2 Daxue Road, Tangjia, Zhuhai, Guangdong 519082, PR China
Accepted: 10 May 2019
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.
Key words: galaxies: dwarf / galaxies: formation / galaxies: star clusters: general / galaxies: halos
© ESO 2019
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