Search for dwarf galaxies in the southwestern sector of the Local cosmic void

Abstract

We performed a search for new dwarf galaxies in a direction towards the southwestern part of the Local Void using the data on DESI Legacy Imaging Surveys. In a sky area of $\sim 1000$ square degrees, we discovered 12 candidates to nearby dwarfs with a high confidence. Four of them are probable new companions to the nearby galaxy M 83 and others are isolated objects. We found also 20 nearby dwarf candidates with a low confidence. Almost all of the detected galaxies are classified as late type dwarfs. A new cluster of bluish stars with an angular diameter of 0.9${}^{\prime }$ is revealed by us at a high galactic latitude, $b=-29^{\circ }$. Being at a distance of $\sim 70$ kpc, it can be a globular cluster associated with the Milky Way stellar stream Sagittarius dSph or a new ultra-faint satellite of the Milky Way.

11 pages, 5 figures, 4 tables, accepted by Astrophysics