Masses of Isolated Spiral KIG Galaxies, Determined by the Motions of Their Faint Companions

Караченцева, В. Е.; Караченцев, И. Д.; Мelnyk, О. V.

doi:10.1134/s1990341321040076

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…A similar analysis of data on 141 dwarfs with known radial velocities around isolated spiral KIG-galaxies gives an average ratio of 〈M T /L K 〉 = 20.9 ± 3.1(M e /L e ) (Karachentseva et al 2021b). For isolated spiral galaxies of the 2MIG catalog, the median of this ratio via 154 satellites is 17 M e /L e (Karachentseva et al 2011).…”

Section: Discussionmentioning

confidence: 77%

Around the Spindle Galaxy: The Dark Halo Mass of NGC 3115

Караченцев

Макарова

Anand

et al. 2022

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We report observations of five dwarf galaxies in the vicinity of the luminous S0 galaxy NGC 3115 performed with the Advanced Camera for Surveys on the Hubble Space Telescope. Their distances determined via the Tip of the Red Giant Branch are: 10.05 Mpc (UGCA 193), 9.95 Mpc (KKSG 17), 10.13 Mpc (2MASX-J0957-0915), 10.42 Mpc (2dFGRS-TGN218Z179), and 11.01 Mpc (KKSG 19). With their typical distance error of about 0.75 Mpc all the five dwarfs are consistent to be true satellites of the host galaxy NGC 3115 (10.2 ± 0.2 Mpc). Using the DESI Legacy Imaging Surveys we also found five new probable dwarf satellites of NGC 3115, as well as four new probable members of the neighboring group around NGC 3521 situated 3 Mpc away from the NGC 3115 group. Based on the radial velocities and projected separations of 10 dwarf companions, we derived the total (orbital) mass of NGC 3115 to be (4.89 ± 1.48) 1012 M ⊙. The ratio of the total mass-to-K luminosity of NGC 3115 is (50 ± 15) M ⊙/L ⊙, which is typical for the early-type luminous galaxies.

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Section: Discussionmentioning

confidence: 77%

Around the Spindle Galaxy: The Dark Halo Mass of NGC 3115

Караченцев

Макарова

Anand

et al. 2022

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“…A similar analysis of data on 141 dwarfs with known radial velocities around isolated spiral KIGgalaxies gives an average ratio of M T /L K = 20.9 ± 3.1(M /L ) (Karachentseva et al 2021b).…”

Section: Hst Observations and New Trgb Distancesmentioning

confidence: 76%

“…Despite the poor statistics, these parameters turn out to be quite representative for the population of massive ETG galaxies. Thus, a sample of 26 isolated E,S0 galaxies of the northern sky from the KIG-catalog, which have faint companions with measured radial velocities, is characterized by the values: log(L K /L ) = 11.01 ± 0.06 and M T /L K = 74 ± 26(M /L ) (Karachentseva et al 2021a). For 60 isolated ETG galaxies from the 2MIG catalog, in which the radial velocities of satellites were measured, the median parameters are log(L K /L ) = 11.13 and M T /L K = 63(M /L ) (Karachentseva et al 2011).…”

Section: Hst Observations and New Trgb Distancesmentioning

confidence: 99%

Around the Spindle galaxy: the dark halo mass of NGC3115

Karachentsev,

Makarova,

Anand

et al. 2022

Preprint

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We report observations of five dwarf galaxies in the vicinity of the luminous S0 galaxy NGC 3115 performed with the Advanced Camera for Surveys on the Hubble Space Telescope. Their distances determined via the Tip of the Red Giant Branch are: 10.05 Mpc (UGCA 193), 9.95 Mpc (KKSG 17), 10.13 Mpc (2MASX-J0957-0915), 10.42 Mpc (2dFGRS-TGN218Z179) and 11.01 Mpc (KKSG 19). With their typical distance error of about 0.75 Mpc all the five dwarfs are consistent to be true satellites of the host galaxy NGC 3115 (10.2±0.2 Mpc). Using the DESI Legacy Imaging Surveys we also found 5 new probable dwarf satellites of NGC 3115, as well as 4 new probable members of the neighboring group around NGC 3521 situated 3 Mpc away from the NGC 3115group. Based on the radial velocities and projected separations of 10 dwarf companions, we derived the total (orbital) mass of NGC 3115 to be (4.89±1.48) 10 12 M . The ratio of the total mass-to-K-luminosity of NGC 3115 is (50±15) M /L , which is typical for the early-type luminous galaxies.

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