# The Local Volume galaxy census and HST SNAP surveys

## TL;DR

This study analyzes HST images of dwarf galaxies outside the Local Group, determining new distances and identifying probable satellite galaxies, while highlighting variability in survey productivity.

## Contribution

It provides new distance measurements for two dwarf galaxies and identifies their likely association with larger spirals, revealing insights into the Local Volume galaxy census.

## Key findings

- Two new galaxy distances determined via the Tip of the Red Giant Branch.
- Identification of probable dwarf satellites of NGC 4826 and NGC 4736.
- Significant variability in the effectiveness of different SNAP surveys.

## Abstract

We examined F814W and F606W images of dwarf galaxies from the Hubble Space Telescope archive, which were obtained under the HST SNAP programs 17159 to 17797. Among 58 observed dwarfs located outside the Local Group, we found only a few objects that were confidently resolved into stars. We determined two new distances for the galaxies: dw1252+2215 ($5.32\pm0.20$ Mpc) and dw1234+3952 ($4.34\pm0.16$ Mpc) via the Tip of the Red Giant Branch. They turned out to be new probable dwarf satellites of the nearby luminous spiral galaxies NGC 4826 and NGC 4736, respectively. We also note that recent SNAP surveys vary in their productivity in measuring new galaxy distances by more than an order of magnitude.