| Issue |
A&A
Volume 678, October 2023
|
|
|---|---|---|
| Article Number | A16 | |
| Number of page(s) | 8 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361/202347085 | |
| Published online | 28 September 2023 | |
The M 101 galaxy group as a node in a nearby cosmic filament
1
Main Astronomical Observatory, National Academy of Sciences of Ukraine, Kiev 03143, Ukraine
2
Special Astrophysical Observatory of the Russian Academy of Sciences, N. Arkhyz, KChR 369167, Russia
e-mail: kaisina.elena@gmail.com
Received:
1
June
2023
Accepted:
3
August
2023
We performed a search for faint low-surface-brightness dwarf galaxies around the major spiral galaxy M 101 and in the large rectangular area within SGL = [30–80]° and SGB = [10–37]° spanning a chain of galaxies: M 63, M 51, M 101, and NGC 6503. We based our search on data from DESI Legacy Imaging Surveys. We discovered six new probable dwarf members of the complex. We present a list of 25 prospective members of the M 101 group and estimate the total mass and the total-mass-to-K-band-luminosity ratio of the group as (1.02 ± 0.42)×1012 M⊙ and (16.0 ± 6.5) M⊙/L⊙, respectively. We note that the average dark mass-to-luminosity ratio in the groups around M 63, M 51, and M 101 is (12 ± 4) M⊙/L⊙, which is almost an order of magnitude lower than the global cosmic ratio, (102 ± 5) M⊙/L⊙.
Key words: galaxies: dwarf / galaxies: groups: individual: M 101 / large-scale structure of Universe
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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