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Based on the archival Hubble Space Telescope images, we have performedstellar photometry for 18 dwarf galaxies. Branches of young and old stars areseen on the constructed Hertzsprung-Russell diagrams. Using the photometry ofred giants and applying the TRGB method, we have determined accurate distancesfor all 18 galaxies for the first time. The galaxies AGC238890 and AGC747826have minimum ($D$ = 5.1 Mpc) and maximum ($D$ = 12.0 Mpc) distances,respectively. The distances to the remaining galaxies lie within this range.Low-metallicity galaxies have been identified by measuring the color indices ofthe red giant branch: AGC102728, AGC198691, AGC205590, AGC223231, AGC731921,and AGC747826. We have determined the distance to AGC198691 with a record lowmetallicity. Since AGC223254, AGC229053, AGC229379, AGC238890, AGC731921, andAGC742601 are projected onto the Virgo cluster of galaxies, the distancesestimated by us together with the velocities of these galaxies measuredpreviously at Arecibo can be used to refine the effect of galaxy infall to theVirgo cluster.

Distances to 18 Dwarf Galaxies from the Arecibo Survey