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Distances to 24 Dwarf Galaxies

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Stellar photometry of 24 dwarf galaxies was carried out using the archival images of the Hubble Space Telescope. The resulting Hertzsprung–Russell diagrams reveal branches of young and old stars. Using the results of photometry and applying the TRGB method, we have for the first time determined exact distances to 13 galaxies. Galaxy PGC 704814 is located at the closest distance (\(D = 3.73\) Mpc), while SDSS J115 840.37+153 533.7 is located the farthest from us (\(D = 11.95\) Mpc). The distances to other galaxies lie in the range from 7 to 11 Mpc. The object SDSS J140 457.78+534 128.2, as follows from the distribution of red giants, is not a galaxy, but rather a young star complex on the periphery of the neighboring galaxy NGC 5474.

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ACKNOWLEDGMENTS

The study is based on the observations made with the NASA/ESA Hubble Space Telescope by the Space Telescope Science Institute operated by AURA, Inc. (the Association of Universities for Research in Astronomy) on behalf of NASA under contract No. NAS5-26555. These observations are related to the proposal HST ID 15922. The NED and HyperLeda databases were as well used in this study.

Funding

The work on the study of dwarf galaxies was carried out within the framework of the grant of the Ministry of Science and Higher Education of the Russian Federation no. 075-15-2022-262 (13.MNPMU.21.0003).

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Russia

    N. A. Tikhonov & O. A. Galazutdinova

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  1. N. A. Tikhonov
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  2. O. A. Galazutdinova
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Correspondence to N. A. Tikhonov.

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Translated by M. Zyazeva

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Tikhonov, N.A., Galazutdinova, O.A. Distances to 24 Dwarf Galaxies. Astrophys. Bull. 77, 388–396 (2022). https://doi.org/10.1134/S1990341322040150

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