2006A&A...457...45P

Query : 2006A&A...457...45P

2006A&A...457...45P - Astronomy and Astrophysics, volume 45745-59 (2006/10-1)

New southern blue compact dwarf galaxies in the 2dF Galaxy redshift survey.

PAPADEROS P., GUSEVA N.G., IZOTOV Y.I., NOESKE K.G., THUAN T.X. and FRICKE K.J.

Abstract (from CDS):

Aiming to find new extremely metal-deficient star-forming galaxies we extracted from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) 100K Data Release 14 emission-line galaxies with relatively strong [OIII]λ4363 emission.Spectroscopic and photometric studies of this sample and, in addition, of 7 Tololo and 2 UM galaxies were performed on the basis of observations with the ESO 3.6m telescope. All sample galaxies qualify with respect to their photometric and spectroscopic properties as blue compact dwarf (BCD) galaxies. Additionally, they show a good overlap with a comparison sample of ∼100 well-studied emission-line galaxies on the 12+log(O/H) vs. log(Ne/O), log(Ar/O) and log(Fe/O) planes. From the analysis of the 2dFGRS subsample we report the discovery of two new extremely metal-deficient BCDs with an oxygen abundance 12+log(O/H)≤7.6 and of another seven galaxies with 12+log(O/H)≲7.8. Furthermore, we confirm previous oxygen abundance determinations for the BCDs Tol 1304-353, Tol 2146-391, UM 559 and UM 570 to be 12+log(O/H)≤7.8.

Abstract Copyright: ∼

Journal keyword(s): galaxies: starburst - galaxies: abundances - galaxies: fundamental parameters - galaxies: structure

CDS comments: Table 2, Fig.1: H II regions selected along the slit are not in SIMBAD.

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 - 2026 		#notes
1 2dFGRS TGS893Z604 G 00 23 05.9 -40 59 01   17.182   17.152   ~ 1 0
2 2dFGRS TGS380Z091 G 01 36 14.3 -29 42 43   18.401   18.342   ~ 2 0
3 LEDA 769948 G 03 13 02.5 -26 14 34   18.462   18.388   ~ 4 0
4 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 110 1
5 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 220 1
6 SBSG 0335-052 AGN 03 37 44.06 -05 02 40.2     16.65     ~ 500 1
7 2dFGRS TGS909Z481 G 05 15 20.5 -31 25 25   18.032   17.950   ~ 1 0
8 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
9 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
10 2dFGRS TGN105Z061 G 11 01 06.4 -05 34 45   18.517   18.371   ~ 1 0
11 2dFGRS TGN111Z260 G 11 26 55.5 -04 47 54   18.178   17.962   ~ 1 0
12 LEDA 1122171 AG? 12 13 38.8130547696 -01 17 36.830808744   18.836   18.743   ~ 13 0
13 LEDA 39402 AGN 12 17 17.093 -28 02 32.67   17       ~ 143 0
14 2dFGRS TGN248Z184 G 12 21 55.7 -01 35 20   18.495   18.382   ~ 1 0
15 ESO 323-83 AG? 13 07 21.4286 -38 54 43.752   16.89   16.15   ~ 31 0
16 LEDA 45469 H2G 13 07 37.4 -35 38 36   17       ~ 30 0
17 Z 16-45 LSB 13 17 43.1868710184 -01 00 03.820032216   16.0   15.7 16.2 ~ 45 0
18 2QZ J132347.5-013252 EmG 13 23 47.4573498792 -01 32 52.048078188           ~ 49 0
19 LEDA 46982 AGN 13 25 48.66 -11 36 37.8   17.93 17.43     ~ 98 0
20 ESO 383-43 AG? 13 37 08.3 -32 55 32   15.81   15.79 17.02 ~ 30 0
21 2dFGRS TGN339Z096 G 14 01 07.5 -00 41 01   18.526   18.340   ~ 1 0
22 SCHG 1400-411 bCG 14 03 15.50 -41 22 24.0           ~ 10 0
23 ESO 338-4 EmG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 253 1
24 SCHG 2138-405 AGN 21 41 21.960 -40 18 54.69   17.68   17.62   ~ 26 1
25 LEDA 85193 H2G 21 49 48.2196 -38 54 08.587           ~ 21 0
26 2dFGRS TGS479Z167 G 22 10 12.7 -33 39 47   18.904   18.822   ~ 1 0
27 2dFGRS TGS116Z004 G 22 13 26.1 -25 26 43   18.282   18.182   ~ 4 0
28 2dFGRS TGS180Z125 G 22 29 01.5 -27 51 05   19.218   19.137   ~ 1 0
29 2dFGRS TGS120Z230 G 22 36 10.3 -25 11 14   18.604   18.517   ~ 1 0
30 2dFGRS TGS258Z058 G 22 37 02.29 -28 52 43.7   19.218   19.141   ~ 4 0

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