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Positions of the Sculptor Filament and the nearby Virgo and Fornax clusters in Cartesian Supergalactic coordinates
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Two dozens of different mass galaxies observed at distances less than 10 Mpc from the Local Group are organized in the elongated structure known as the Sculptor Filament. We use recent Hubble Space Telescope data on local galaxies to study the dynamical structure and evolutionary trends of the filament. An N-body computer model, which reproduces it...
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Citations
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)×10 ¹² 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 ⊙ .
