2000A&AS..142..347D

Query : 2000A&AS..142..347D

2000A&AS..142..347D - Astron. Astrophys., Suppl. Ser., 142, 347-352 (2000/March-2)

The stellar content and distance to the nearby blue compact dwarf galaxy NGC 6789.

DROZDOVSKY I. and TIKHONOV N.

Abstract (from CDS):

In this paper we present the results of a detailed B, V, R, I, and Hα study of the isolated nearby blue compact dwarf (BCD) galaxy NGC 6789. The observed galaxy has not yet been resolved into stars up to now. On CCD frames obtained with 6m BTA telescope and 2.5m Nordic telescope the galaxy is well resolved. Its colour-magnitude diagram confirms the two component (core-halo) galaxy morphology, which consists of two stellar populations distinct in structure and colour: an inner high surface-brightness young population within 150pc from the center of the galaxy, and a relatively low surface-brightness intermediate-age population extending out to at least 600pc. The distance to the galaxy, estimated from the tip of the red giant branch (TRGB) is 2.1Mpc which places NGC 6789 close to the Local Group. From the mean colour of the RGB, the mean metal abundance of the halo population is estimated as [Fe/H]≃-1dex.

Abstract Copyright: ∼

Journal keyword(s): nearby galaxies: dwarf galaxies (NGC 6789): distance moduli: star content

VizieR on-line data: <Available at CDS (J/A+AS/142/347): table2.dat>

Simbad objects: 47

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Number of rows : 47
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 Wolf-Lundmark-Melotte G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 691 2
2 NGC 55 GiG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 778 2
3 IC 10 G 00 20 25.50 +59 17 17.0   13.6 9.5     ~ 1118 1
4 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 687 1
5 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 800 1
6 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1308 1
7 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2154 2
8 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12643 1
9 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 441 2
10 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3335 2
11 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11145 1
12 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1502 2
13 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1358 4
14 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 387 0
15 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1235 2
16 UGC 1104 AG? 01 32 42.5190557016 +18 19 01.514434548 15.03 14.56 14.13 13.89   ~ 95 0
17 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
18 IC 152 G 01 44 01.413 +13 04 26.93   12.96       ~ 19 0
19 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 533 2
20 NAME Cas 1 G 02 06 07.9 +69 00 36     14.62     ~ 48 0
21 UGCA 39 GiG 02 41 55.092 +59 36 14.73   16       ~ 350 1
22 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1516 1
23 UGCA 92 AG? 04 32 03.8366 +63 36 51.243   16.15       ~ 125 0
24 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 662 1
25 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17428 0
26 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1124 0
27 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 353 2
28 NAME Leo A G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 615 0
29 NAME Sextans B H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 528 0
30 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 769 2
31 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 212 1
32 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1208 1
33 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 727 2
34 NAME Sextans dSph G 10 13 02.9 -01 36 53   12 10.4     ~ 853 0
35 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 840 0
36 NGC 4163 LSB 12 12 09.34 +36 10 08.1 14.33 13.70 13.2 12.98   ~ 222 0
37 IC 3104 AG? 12 18 46.06 -79 43 33.9   13.65 12.8 12.04   ~ 85 1
38 UGC 8091 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 463 0
39 NAME UMi Galaxy G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1358 0
40 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1330 1
41 IC 4662 bCG 17 47 09.192 -64 38 19.25   11.75 11.1 10.45   ~ 235 4
42 NGC 6789 AG? 19 16 41.169 +63 58 23.90   13.76       ~ 113 1
43 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 307 1
44 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
45 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 445 1
46 ESO 407-18 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 155 0
47 NAME Local Group GrG ~ ~           ~ 8387 0

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