2002A&A...383..125K


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:08:20

2002A&A...383..125K - Astronomy and Astrophysics, volume 383, 125-136 (2002/2-3)

The M 81 group of galaxies: New distances, kinematics and structure.

KARACHENTSEV I.D., DOLPHIN A.E., GEISLER D., GREBEL E.K., GUHATHAKURTA P., HODGE P.W., KARACHENTSEVA V.E., SARAJEDINI A., SEITZER P. and SHARINA M.E.

Abstract (from CDS):

We present Hubble Space Telescope/WFPC2 images of the galaxies NGC 2366, NGC 2976, NGC 4236, IC 2574, DDO 53, DDO 82, DDO 165, Holmberg I, Holmberg II, Holmberg IX, K52, K73, BK3N, Garland, and A0952+69 in the M 81 complex. Their true distance moduli, derived from the brightness of the tip of the red giant branch, lie in the range of 27.mag 52 (NGC 2366) to 28.mag 30 (DDO 165), with a median of 27.mag 91, which is typical for other known M 81 group members. Using distances and radial velocities of about 50 galaxies in and around the M 81/NGC 2403 complex, we find the radius of the zero-velocity surface of the M 81 group to be R0=(1.05±0.07)Mpc, which yields a total mass M(R0)=(1.6±0.3)x1012M and a total mass-to-luminosity ratio M(R0)/LB=(38±7)M/L. The total mass within R0 agrees well with the sum of masses estimated via the virial theorem (1.2x1012M) and from orbital motions (2.0x1012M) of companions around M 81 and NGC 2403. We suggest that most of the dark matter in the group is concentrated around the luminous matter, allowing us to explain the observed asymmetry of the peculiar motions of the M 81 companions. M 81 itself has a peculiar velocity of about 130km/s with respect to the local Hubble flow, but the centroid of the M 81/NGC 2403 complex is almost at rest with respect to Hubble flow (vpec<35km/s).

Abstract Copyright:

Journal keyword(s): galaxies: dwarf - galaxies: distances and redshifts - galaxies: structure - galaxies: kinematics and dynamics

Simbad objects: 60

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Number of rows : 60

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 465 0
2 NAME Camel Galaxy LSB 04 25 16.6 +72 48 24   14.85       ~ 53 0
3 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1158 3
4 NGC 1560 GiG 04 32 49.087 +71 52 59.20   12.1       ~ 241 0
5 NAME Cam B G 04 53 07.1 +67 05 57   16.71       ~ 69 0
6 UGCA 105 GiG 05 14 15.3240822656 +62 34 47.963432681   15.3       ~ 74 1
7 LEDA 95594 G 05 59 40.4 +73 25 40   17.1       ~ 40 0
8 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 542 3
9 NGC 2366 H2G 07 28 51.85 +69 12 31.1 12.25 11.86 11.39 11.33   ~ 709 0
10 UGCA 133 G 07 34 11.5 +66 52 47 16.40 15.48 14.80 14.76   ~ 69 0
11 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1625 1
12 NAME NGC 2403 Group GrG 07 36.9 +65 36           ~ 21 0
13 NGC 2537 IG 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 274 1
14 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 700 2
15 NAME M 81 Dwarf A G 08 23 55.1 +71 01 56   16.5       ~ 189 1
16 UGC 4426 G 08 28 28.560 +41 51 27.13   18       ~ 135 0
17 UGC 4459 GiG 08 34 07.29 +66 10 54.6 15.39 15.03 14.70 14.49   ~ 296 2
18 UGC 4483 GiG 08 37 03.29 +69 46 29.2 15.70 15.46 14.98 14.89   ~ 269 0
19 UGC 5139 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 325 1
20 NAME F8D1 G 09 44 47.1 +67 26 19   14.60 13.85     ~ 59 0
21 NGC 2976 GiP 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 591 1
22 NAME F12D1 G 09 50 10.0 +67 30 24   15.6       ~ 44 1
23 LEDA 28529 G 09 53 48.8 +68 58 09   18.89       ~ 84 1
24 NAME M 81-82 Group GrG 09 55 +69.1           ~ 640 0
25 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 3997 5
26 NAME Arp Loop G 09 57 29.0 +69 16 20           ~ 59 1
27 UGC 5336 G 09 57 32.1 +69 02 46 15.19 15.15 14.10 14.12   ~ 292 4
28 LEDA 2807133 GiG 10 00 16.0 +63 11 05           ~ 36 1
29 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 695 0
30 NAME Garland G 10 03 43.1 +68 41 32           ~ 54 2
31 LEDA 29231 G 10 04 40.3 +68 15 20   17.43 16.72     ~ 65 0
32 UGC 5428 G 10 05 06.2 +66 33 31 17.89 16.82 16.09 15.73   ~ 93 1
33 NAME M81 dwB G 10 05 30.44 +70 21 53.9 15.95 15.56 15.09 14.87   ~ 179 1
34 UGC 5442 G 10 07 01.70 +67 49 38.4 17.09 15.73 15.07 14.81   ~ 76 1
35 HIJASS J1021+68 G 10 21 00.2 +68 42 00           ~ 20 0
36 LEDA 30664 G 10 26 28.0 +67 39 35   15.8       ~ 70 1
37 IC 2574 G 10 28 23.6204574649 +68 24 43.441365350 11.70 11.07 10.87 10.74   ~ 610 1
38 UGC 5692 GiG 10 30 36.58 +70 37 06.0 14.81 13.69 13.01 12.73   ~ 115 0
39 LEDA 31286 G 10 34 31.9 +66 00 42   16.7       ~ 45 1
40 UGC 5918 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 129 0
41 LEDA 32667 LSB 10 52 55.1 +69 32 46   17.2       ~ 77 1
42 UGC 6456 bCG 11 28 00.43 +78 59 38.4   14.50       ~ 309 1
43 Mrk 178 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 214 1
44 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 253 0
45 NGC 3741 G 11 36 05.754 +45 17 02.96 15.01 14.55 14.23 14.06   ~ 194 0
46 LEDA 166115 G 11 47 11.965 +43 40 18.79   17.5       ~ 36 1
47 NGC 4068 G 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 152 0
48 NGC 4144 GiG 12 09 58.601 +46 27 25.85   12.17   11.50   ~ 206 0
49 UGC 7242 G 12 14 08.89 +66 05 39.3   14.60       ~ 71 1
50 UGC 7298 LSB 12 16 30.415 +52 13 45.40   17       ~ 69 1
51 NGC 4236 GiG 12 16 42.118 +69 27 45.25 10.97 10.58 10.08 9.90   ~ 364 1
52 [KKH2001] 79 LSB 12 19 51.6 +61 31 06   17.7       ~ 5 0
53 Mrk 209 bCG 12 26 16.02 +48 29 36.6   15.3       ~ 305 0
54 NGC 4605 GiG 12 39 59.381 +61 36 33.09   10.94   10.35   ~ 291 2
55 UGC 8201 G 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 226 1
56 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 233 0
57 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 425 0
58 UGC 8508 G 13 30 44.8713405615 +54 54 38.531712530 14.72 14.25 13.90 13.75   ~ 167 0
59 LEDA 50911 G 14 15 08.593 +57 05 30.99   16.5       ~ 28 0
60 NAME Local Group GrG ~ ~           ~ 7070 0

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:08:20

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