2001A&A...375..359K

Query : 2001A&A...375..359K

2001A&A...375..359K - Astronomy and Astrophysics, volume 375359-365 (2001/8-4)

WFPC2 observations of two dwarf spheroidal galaxies in the M 81 group.

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

Abstract (from CDS):

We have obtained HST WFPC2 and ground-based images of two low surface brightness dwarf spheroidal galaxies in the M 81 group, FM1 and KKH57. Their colour-magnitude diagrams show red giant branches with tips at I=23.77±0.14 and I=23.97±0.17, respectively. The derived true distance moduli, 27.66±0.16 and 27.96±0.19, agree well with the mean distance modulus of the M 81 group, 27.84±0.05. Absolute V magnitudes of the galaxies (-11.46 and -10.85), their colours ((B-V)=0.88 and 0.80), and central surface brightnesses (Σ0,V=24.8 and 24.4mag/arcsec2) are in the range of other dSph companions of M 81, M 31, and Milky Way. With two new objects the maximum projected radius of the dwarf spheroidal subsystem around M 81 is 380kpc.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: stellar content - galaxies: distances - galaxies: M 81 group: FM1 and KKH57

CDS comments: In ref list 2000A&AS.145.229F instead of 2000A&A.145.229F.

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
3 UGCA 133 G 07 34 11.5 +66 52 47 16.40 15.48 14.80 14.76   ~ 93 0
4 NAME F8D1 G 09 44 47.1 +67 26 19   14.60 13.85     ~ 80 0
5 NAME F6D1 GiG 09 45 10.0 +68 45 54   17.5       ~ 53 0
6 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
7 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
8 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
9 LEDA 28731 G 09 57 02.7 +68 35 30   15.17       ~ 119 1
10 LEDA 2807133 GiG 10 00 16.0 +63 11 05           ~ 40 1
11 LEDA 29231 G 10 04 40.3 +68 15 20   17.43 16.72     ~ 77 0
12 UGC 5428 AG? 10 05 06.40 +66 33 32.0 17.89 16.82 16.09 15.73   ~ 113 1
13 UGC 5442 AG? 10 07 01.90 +67 49 39.0 17.09 15.73 15.07 14.81   ~ 95 1
14 DDO 78 G 10 26 27.9 +67 39 24   15.8       ~ 88 1
15 LEDA 31286 G 10 34 31.9 +66 00 42   16.7       ~ 52 1
16 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
17 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1

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