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Accepted manuscript

More Local Volume dwarf galaxy candidates

Published online by Cambridge University Press:  24 January 2025

I.D. Karachentsev Open the ORCID record for I.D. Karachentsev [Opens in a new window] ,
V.E. Karachentseva ,
K.V. Vladimirova  and
K.A. Kozyrev
I.D. Karachentsev
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, Zelenchukskiy region, Karachai-Cherkessian Republic, 369167, Russia
V.E. Karachentseva
Affiliation:
Main Astronomical Observatory, National Academy of Sciences of Ukraine, Kiev, 03143, Ukraine
K.V. Vladimirova
Affiliation:
St. Petersburg University, 199034, St. Petersburg, Russia
K.A. Kozyrev
Affiliation:
Kazan (Volga Region) Federal University, 420000, Kazan, Russia
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Abstract

We present the results of searching for new dwarf galaxies in the Local Volume. We found 40 satellite candidates in the double-virial-radius regions of 20 Milky Way-like and LMC-like galaxies in the southern sky using DESI Legacy Imaging Surveys, 10 of which were known but not clearly associated with the Local Volume previously. Among the 40 satellite candidates, 8 are supposed members of the NGC6744 group and 13 are located in the vicinity of the Sombrero galaxy. Based on seven companions to the giant spiral galaxy NGC6744 with measured radial velocities, we estimate that the total mass of the group is MT =(1.88 ± 0.71)×1012M⊙ and the total mass-to-K-luminosity ratio MT /LK =(16.1 ± 6.0)M⊙/L⊙. We reproduce a distribution of 68 early- and late-type galaxies in the Local Volume situated around the Sombrero, noting their strong morphological segregation and also the presence of a foreground diffuse association of dwarf galaxies at 8 degrees to SE from the Sombrero.

Keywords

dwarf galaxieshalo galaxieslocal volume
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Accepted manuscript , pp. 1 - 15
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of Astronomical Society of Australia

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