2004A&A...423...87G

Query : 2004A&A...423...87G

2004A&A...423...87G - Astronomy and Astrophysics, volume 423, 87-95 (2004/8-3)

BVR photometry of the resolved dwarf galaxy HoIX.

GEORGIEV T.B. and BOMANS D.J.

Abstract (from CDS):

We present BVR CCD photometry down to limiting magnitude B=23.5mag for 232 starlike objects and 11 diffuse objects in a 5.4'x5.4' field of HoIX. The galaxy is a gas-rich irregular dwarf galaxy possibly very close to M81, which makes it especially interesting in the context of the evolution of satellite galaxies and the accretion of dwarf galaxies. Investigations of HoIX were hampered by relatively large contradictions in the magnitude scale between earlier studies. With our new photometry we resolved these discrepancies. The color magnitude diagram (CMD) of HoIX is fairly typical of a star-forming dwarf irregular, consistent with earlier results. Distance estimates from our new CMD are consistent with HoIX being very close to M81 and therefore being a definite member of the M81 group, apparently in very close physical proximity to M81.

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Journal keyword(s): galaxies: individual: HoIX - galaxies: evolution - galaxies: dwarf - galaxies: photometry

Nomenclature: Table 1: [GB2004] AN (Nos D1-D8).

Simbad objects: 27

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Number of rows : 27
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 LMC G 05 23 34.6 -69 45 22     0.4     ~ 17428 0
2 NAME M 81-82 Group GrG 09 55 +69.1           ~ 716 0
3 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4447 3
4 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5858 6
5 [GTK91b] 3 Gl? 09 56 36.81 +69 01 44.2   20.98 19.82     ~ 3 0
6 [GTK91b] 2 Gl? 09 57 05.24 +69 02 20.2   21.61 20.42     ~ 3 0
7 [GTK91] 34 * 09 57 10.17 +69 01 37.5   21.73 19.80     ~ 5 0
8 [GTK91b] 5 Gl? 09 57 17.62 +69 04 32.6   21.54 20.71     ~ 3 0
9 UGC 5336 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 315 4
10 [GTK91] 49 * 09 57 46.47 +69 02 11.8   22.00 19.99     ~ 5 0
11 [GTK91] 46 * 09 57 54.15 +69 03 23.9   22.05 20.08     ~ 5 0
12 [CVL2009] UGC 5336-3 HII 09 57 54.18 +69 03 48.6           ~ 12 1
13 2MASS J09575776+6903134 LM* 09 57 57.7514495304 +69 03 13.599800892   21.60 19.60     M5V 7 0
14 [GTK91] 44 * 09 58 04.18 +69 00 54.2   20.94 18.95     ~ 4 0
15 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 770 0
16 NGC 7790 OpC 23 58 27.1 +61 12 36   9.18 8.5     ~ 272 0
17 [GB2004] D6 ? ~ ~   21.97 21.07     ~ 1 0
18 [GB2004] D5 ? ~ ~   22.02 21.41     ~ 1 0
19 [GB2004] D4 ? ~ ~   21.75 20.68     ~ 1 0
20 [GB2004] D3 ? ~ ~   21.11 21.03     ~ 1 0
21 [GB2004] D2 ? ~ ~   22.73 21.46     ~ 1 0
22 [GB2004] D1 ? ~ ~   21.20 21.14     ~ 1 0
23 [GTK91] T10 * ~ ~   19.14 18.54     ~ 2 0
24 [GTK91] T1 * ~ ~   16.46 15.33     ~ 3 0
25 [GTK91] 50 * ~ ~   20.82 20.57     ~ 3 0
26 [GB2004] D8 ? ~ ~   21.99 21.27     ~ 1 0
27 [GB2004] D7 ? ~ ~   21.12 21.03     ~ 1 0

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