1999A&AS..137..337B

Query : 1999A&AS..137..337B

1999A&AS..137..337B - Astron. Astrophys., Suppl. Ser., 137, 337-350 (1999/June-1)

Structure and stellar content of dwarf galaxies. III. B and R photometry of dwarf galaxies in the M101 group and the nearby field.

BREMNES T., BINGGELI B. and PRUGNIEL P.

Abstract (from CDS):

We have carried out CCD photometry in the Cousins B and R bands of 21 dwarf galaxies in and around the M101 group. Eleven are members and suspected members of the group and ten are field galaxies in the projected vicinity of the group. We have derived total magnitudes, effective radii, effective surface brightnesses, as well as galaxy diameters at various isophotal levels in both colours. Best-fitting exponential parameters and colour gradients are also given for these galaxies. Some of the galaxies show a pronounced luminosity excess above the best-fitting exponential at large radii, or surface brightnesses fainter than ≃26 mag/arcsec2 in R. This feature, while non-significant for a single case and technically difficult to interpret, might be an indication of the existence of an extended old stellar halo in dwarf irregulars. The photometric parameters of the galaxies presented here will be combined with previously published data for nearby dwarf galaxies and statistically analysed in a forthcoming paper.

Abstract Copyright: ∼

Journal keyword(s): galaxies: general - galaxies: fundamental parameters - galaxies: photometry - galaxies: irregular - galaxies: structure - galaxies: luminosity function

Simbad objects: 30

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Number of rows : 30
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 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 509 0
2 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1517 1
3 NAME IC 342 Group GrG 03 48 42 +68 00.8           ~ 100 1
4 NAME M 81-82 Group GrG 09 55 +69.1           ~ 717 0
5 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4450 3
6 NAME CVn I Group GrG 12 32 48.3 +33 57 07           ~ 142 0
7 UGC 8215 AG? 13 08 03.552 +46 49 40.02   17       ~ 77 0
8 UGC 8308 AG? 13 13 22.839 +46 19 21.71   17       ~ 131 1
9 UGC 8320 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 282 0
10 UGCA 342 AG? 13 15 07.535 +42 00 11.23   17       ~ 14 1
11 UGC 8331 AG? 13 15 29.753 +47 29 58.69   15.6       ~ 107 1
12 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 263 0
13 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 471 0
14 UGC 8508 AG? 13 30 44.8682655624 +54 54 38.522749824 14.72 14.25 13.90 13.75   ~ 195 0
15 NGC 5229 LSB 13 34 02.831 +47 54 55.68   14.6       ~ 141 0
16 NGC 5238 GiP 13 34 42.5146948080 +51 36 49.168365696   14.2       ~ 130 0
17 UGC 8651 AG? 13 39 53.75 +40 44 25.3 15.37 14.56 14.20 14.10   ~ 155 0
18 UGC 8760 AG? 13 50 51.3127548768 +38 01 14.958828876 15.56 14.78   14.33   ~ 148 0
19 UGC 8837 AG? 13 54 45.602 +53 54 20.06   14.2       ~ 207 0
20 UGC 8833 AG? 13 54 48.8114 +35 50 07.775   16.5   15.20   ~ 117 1
21 UGC 8882 LSB 13 57 14.6983598016 +54 06 03.171260340   16.0       ~ 25 0
22 MCG+09-23-021 AG? 13 57 37.93 +51 58 25.8   16       ~ 5 0
23 UGC 8914 G 13 59 10.802 +52 21 42.50   17       ~ 14 0
24 NAME M101 Group GrG 14 03 +54.3           ~ 102 1
25 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2916 2
26 NGC 5474 GiP 14 05 01.608 +53 39 43.95   11.28 10.79     ~ 443 1
27 NGC 5477 AG? 14 05 33.318 +54 27 37.85 13.94 14.36 14.01     ~ 209 1
28 UGC 9240 AG? 14 24 43.21 +44 31 41.8 14.24 13.54 13.17 13.07   ~ 200 0
29 UGC 9405 AG? 14 35 24.077 +57 15 21.24   17       ~ 86 0
30 NAME Local Group GrG ~ ~           ~ 8393 0

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