1995A&A...296..643K

Query : 1995A&A...296..643K

1995A&A...296..643K - Astronomy and Astrophysics, volume 296643-650 (1995/4-3)

A search for low surface brightness dwarf galaxies in the Coma cluster core.

KARACHENTSEV I.D., KARACHENTSEVA V.E., RICHTER G.M. and VENNIK J.A.

Abstract (from CDS):

Using the prime focus of the 6-meter telescope, we have searched for low surface brightness dwarf galaxies in two regions in the Coma cluster: one in the center of the cluster and the other one 40arcmin to the west. The observations were carried out with a total exposure time 4x5x600sec and with a 1.2arcsec seeing. Our survey is complete down to V=25.5 and R=25.0mag. The central field shows an excess of faint galaxies (121 versus 104 in the reference field) significant at a one sigma level only. However, the central-field excess is mainly caused by the presence of faint (V=24/25mag), neutral colour (V-R=0.3/0.4) objects of low surface brightness, SB=26.0/26.5mag/arcsec2. These characteristics are quite consistent with those of the dwSph's in the Local Group which have typically Mv≃-10mag and A≃1kpc. The observed excess corresponds to a surface number density of 4gal/arcmin2 in the center of Coma, thus implying a total population of cluster dwarfs of ∼4000 down to the limiting absolute magnitude -10mag. The number ratio of LSBD's to normal galaxies (with M←18mag for normals) in Coma turns out to be 20:1. Such ratio is comparable to that observed in other rich clusters: A3574 (14:1) and A1367 (6:1), but is much larger than the 2:1 ratio obtained for moderate nearby clusters such as Virgo, Fornax, Antlia.

Abstract Copyright: ∼

Journal keyword(s): Coma cluster - galaxies: dwarf - galaxies: general

VizieR on-line data: <Available at CDS (J/A+A/296/643): table1 table2>

Nomenclature: Table 1: [KKR95] 1-NNN (Nos 1-121), Table 2: [KKR95] 2-NNN (Nos 1-104)

CDS comments: Fig. 8: obj. KNN and KNA not in SIMBAD ?

Simbad objects: 23

goto View the references in ADS

Number of rows : 23
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 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
2 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
3 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
4 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
5 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
6 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
7 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
8 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
9 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
10 UGC 5428 AG? 10 05 06.40 +66 33 32.0 17.89 16.82 16.09 15.73   ~ 113 1
11 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
12 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
13 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
14 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
15 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
16 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
17 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
18 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
19 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
20 NAME IC 4329 Group GrG 13 48 36.4 -30 30 13           ~ 147 2
21 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
22 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
23 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0

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