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A Search for New Dwarf Galaxies Outside the Nearby Groups

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We undertook a search for new nearby dwarf galaxies outside the known groups in the Local Volume using the data on DESI Legacy Imaging Surveys. In a wide sky area of ~5000 square degrees directed toward the Local Void, we found only 12 candidates to nearby low mass galaxies. Almost all of them are classified as irregular or transition type dwarfs. Additionally, we examined areas of the sky exposed with the Hyper Suprime Camera of the Subaru telescope (~700 square degrees) and found nine more candidates to nearby dwarfs. Finally, nine candidates to the Local Volume were selected by us from the Zaritsky’s SMUDG catalog that contains 7070 ultra-diffuse objects automatically detected in the whole area of the DESI surveys. We estimated a fraction of quiescent dSph galaxies in the general cosmic field to be less than 10 percent.

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Authors and Affiliations

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

    I. D. Karachentsev, S. S. Kaisin & E. I. Kaisina

  2. Main Astronomical Observatory, National Academy of Sciences of Ukraine, Kiev, 03143, Ukraine

    V. E. Karachentseva

Authors
  1. I. D. Karachentsev
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  2. V. E. Karachentseva
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  3. S. S. Kaisin
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  4. E. I. Kaisina
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Correspondence to I. D. Karachentsev.

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Published in Astrofizika, Vol. 66, No. 4, pp. 471-483 (November 2023)

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Karachentsev, I.D., Karachentseva, V.E., Kaisin, S.S. et al. A Search for New Dwarf Galaxies Outside the Nearby Groups. Astrophysics 66, 441–451 (2023). https://doi.org/10.1007/s10511-024-09801-w

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  • DOI: https://doi.org/10.1007/s10511-024-09801-w

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