2013AJ....146..126C

Query : 2013AJ....146..126C

2013AJ....146..126C - Astron. J., 146, 126 (2013/November-0)

Confirmation of faint dwarf galaxies in the M81 group.

CHIBOUCAS K., JACOBS B.A., TULLY R.B. and KARACHENTSEV I.D.

Abstract (from CDS):

We have followed up on the results of a 65 deg2 CFHT/MegaCam imaging survey of the nearby M81 Group searching for faint and ultra-faint dwarf galaxies. The original survey turned up 22 faint candidate dwarf members. Based on two-color HST ACS/WFC and WFPC2 photometry, we now confirm 14 of these as dwarf galaxy members of the group. Distances and stellar population characteristics are discussed for each. To a completeness limit of Mr' = -10, we find a galaxy luminosity function slope of -1.27±0.04 for the M81 Group. In this region, there are now 36 M81 Group members known, including 4 blue compact dwarfs; 8 other late types including the interacting giants M81, NGC 3077, and M82; 19 early type dwarfs; and at least 5 potential tidal dwarf galaxies. We find that the dSph galaxies in M81 appear to lie in a flattened distribution, similar to that found for the Milky Way and M31. One of the newly discovered dSph galaxies has properties similar to the ultra-faint dwarfs being found in the Local Group with a size Re∼ 100 pc and total magnitude estimates Mr' = -6.8 and MI∼ -9.1.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: fundamental parameters - galaxies: groups: individual: M81 - galaxies: luminosity function, mass function - galaxies: photometry

CDS comments: KUG 0945+670 is a misprint for KUG 0954+670. p.8: d0939+70 is a probable misprint for d0939+71. Table 4: d1014+69 is a misprint for d1014+68. Table 1: PGC designations not recognized by Simbad nor HyperLeda.

Simbad objects: 59

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Number of rows : 59
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12635 1
2 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 387 0
3 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 533 2
4 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1787 1
5 LEDA 5056943 LSB 09 26 27.9 +70 30 24           ~ 16 0
6 LEDA 5056931 G 09 34 03.7 +70 12 57           ~ 11 0
7 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 388 0
8 LEDA 5056932 G 09 39 15.9 +71 18 42           ~ 13 0
9 UGC 5139 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 355 1
10 LEDA 5056933 G 09 44 22.5 +69 12 40           ~ 11 0
11 LEDA 5056944 G 09 44 34.4 +71 28 57           ~ 13 0
12 NAME F8D1 G 09 44 47.1 +67 26 19   14.60 13.85     ~ 69 0
13 NAME F6D1 GiG 09 45 10.0 +68 45 54   17.5       ~ 49 0
14 [CKT2009] dJ0946+68 LSB 09 46 13.0 +68 42 55           ~ 4 0
15 NGC 2976 GiP 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 672 1
16 NAME F12D1 G 09 50 10.0 +67 30 24   15.6       ~ 54 1
17 LEDA 28529 G 09 53 48.8 +68 58 09   18.89       ~ 92 1
18 NAME M 81-82 Group GrG 09 55 +69.1           ~ 715 0
19 LEDA 5056934 G 09 55 13.6 +70 24 29           ~ 13 0
20 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4442 3
21 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5853 6
22 LEDA 28731 G 09 57 03.0 +68 35 31   15.17       ~ 113 1
23 [CKT2009] dJ0957+70 G 09 57 12.4 +70 12 35           ~ 2 0
24 NAME Arp Loop G 09 57 29.0 +69 16 20           ~ 67 1
25 UGC 5336 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 315 4
26 LEDA 28826 G 09 58 49.06 +66 50 53.2   16       ~ 19 0
27 LEDA 5056936 G 09 59 33.1 +68 39 25           ~ 14 0
28 LEDA 2807133 GiG 10 00 16.0 +63 11 05           ~ 39 1
29 NAME Garland G 10 03 43.1 +68 41 32           ~ 63 2
30 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 212 1
31 LEDA 29231 G 10 04 40.3 +68 15 20   17.43 16.72     ~ 73 0
32 UGC 5428 AG? 10 05 06.40 +66 33 32.0 17.89 16.82 16.09 15.73   ~ 105 1
33 LEDA 5056937 G 10 06 46.2 +67 12 04           ~ 12 0
34 UGC 5442 AG? 10 07 01.90 +67 49 39.0 17.09 15.73 15.07 14.81   ~ 88 1
35 NAME IKN G 10 08 05.9 +68 23 57           ~ 73 0
36 [CKT2009] dJ1009+70 G 10 09 34.9 +70 32 55           ~ 9 0
37 UGC 5497 AG? 10 12 48.017 +64 06 28.52   15.7       ~ 23 0
38 [CKT2009] dJ1013+68 G 10 13 11.7 +68 43 45           ~ 2 0
39 LEDA 5056938 LSB 10 14 55.8 +68 45 27           ~ 15 0
40 LEDA 5056947 G 10 15 06.9 +69 02 15           ~ 12 0
41 [CKT2009] dJ1016+69 G 10 16 18.3 +69 29 45           ~ 2 0
42 [CKT2009] dJ1019+69 G 10 19 52.9 +69 11 19           ~ 5 0
43 [CKT2009] dJ1020+69 G 10 20 25.0 +69 11 50           ~ 2 0
44 LEDA 4689216 GiG 10 21 25.2 +71 06 58           ~ 58 0
45 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 219 0
46 LEDA 30664 G 10 26 28.0 +67 39 35   15.8       ~ 80 1
47 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 664 1
48 LEDA 5056941 LSB 10 28 39.7 +70 14 01           ~ 16 1
49 UGC 5692 GiG 10 30 35.03 +70 37 07.2 14.81 13.69 13.01 12.73   ~ 130 0
50 LEDA 31286 G 10 34 31.9 +66 00 42   16.7       ~ 50 1
51 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 838 1
52 LEDA 5056942 G 10 41 16.8 +70 09 03           ~ 12 0
53 [CKT2009] dJ1048+70 G 10 48 57.0 +70 25 38           ~ 2 0
54 UGC 6456 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 335 1
55 NGC 4236 GiG 12 16 42.118 +69 27 45.25 10.97 10.58 10.08 9.90   ~ 400 1
56 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6633 0
57 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1065 2
58 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 263 0
59 NAME Local Group GrG ~ ~           ~ 8378 0

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