2003A&A...397..463U

C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET20:07:44

2003A&A...397..463U - Astronomy and Astrophysics, volume 397, 463-472 (2003/1-2)

The Hamburg/SAO Survey for low metallicity blue compact/HII galaxies (HSS-LM). I. The first list of 46 strong-lined galaxies.

UGRYUMOV A.V., ENGELS D., PUSTILNIK S.A., KNIAZEV A.Y., PRAMSKIJ A.G. and HAGEN H.-J.

Abstract (from CDS):

We present the description and the first results of a new project devoted to the search for extremely metal-deficient blue compact/HII-galaxies (BCGs) and to the creation of a well selected large BCG sample with strong emission lines. Such galaxies should be suitable for reliable determination of their oxygen abundance through the measurement of the faint [OIII]λ4363Å line. The goals of the project are two-fold: a) to discover a significant number of new extremely metal-poor galaxies (Z≲1/20Z_☉), and b) to study the metallicity distribution of local BCGs. Selection of candidates for follow-up slit spectroscopy is performed on the database of objective prism spectra of the Hamburg Quasar Survey. The sky region is limited by δ≥0° and b^II≤-30°. In this paper we present the results of the follow-up spectroscopy conducted with the Russian 6m telescope. The list of observed candidates contained 52 objects, of which 46 were confirmed as strong-lined BCGs (EW([OIII]λ5007)≥100Å). The remaining five lower excitation ELGs include three BCGs, and two galaxies classified as SBN (Starburst Nucleus) and DANS (Dwarf Amorphous Nucleus Starburst). One object is identified as a quasar with a strong Lyα emission line near λ5000Å (z∼3). We provide a list with coordinates, measured radial velocities, B-magnitudes, equivalent widths EW([OIII]λ5007) and EW(Hβ) and for the 46 strong-lined BCGs the derived oxygen abundances 12+log(O/H). The abundances range between 7.42 and 8.4 (corresponding to metallicities between 1/30 and 1/3Z_☉). The sample contains four galaxies with Z≲1/20Z_☉, of which three are new discoveries. This demonstrates the high efficiency of the new project to find extremely metal-deficient galaxies. The radial velocities of the strong-lined ELGs range between 500 and 19000km/s with a median value of ∼6400km/s. The typical B-magnitudes of the galaxies presented are 17.0-18.0mag

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: abundances - galaxies: distances and redshifts - surveys

VizieR on-line data: <Available at CDS (J/A+A/397/463): table2.dat table3.dat>

CDS comments: SBSG 0335-052W = SBSG 0335-052A. SBSG 0335-052E = SBSG 0335-052B. Table 2 : [SS98] 84 = [SS98c] 84 = HS 0024+2314. Tol 1227-273 is a misprint for Tol 1214-277.

Simbad objects: 52

Full paper

View the reference in ADS

Number of rows : 52

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2021	#notes
1	HS 2359+1659	bCG	00 02 09.9	+17 15 59						~	8	0
2	LEDA 101429	G	00 26 52.4	+23 31 12						~	3	0
3	LEDA 101433	G	00 32 03.11	+18 04 46.1						~	14	0
4	SHOC 22	H2G	00 32 18.6200234786	+15 00 14.150465322						~	17	0
5	HS 0031+2645	bCG	00 34 19.7	+27 02 09						~	1	0
6	HS 0034+3047	bCG	00 37 36.8	+31 04 08						~	1	0
7	LEDA 101439	bCG	00 44 20.5	+23 50 00						~	3	0
8	HS 0044+3052	bCG	00 47 26.9	+31 09 02						~	2	0
9	HS 0048+2744	bCG	00 51 05.9	+28 00 35						~	1	0
10	HS 0051+2812	bCG	00 54 23.5	+28 29 09						~	1	0
11	HS 0052+2537	bCG	00 54 55.941	+25 53 23.16						~	5	0
12	IRAS F00522+2537	IR	00 54 56.0	+25 53 15						~	2	0
13	SDSS J005456.38+255307.8	G	00 54 56.387	+25 53 07.85						~	17	0
14	LEDA 101443	G	01 01 32.3	+19 03 32						~	2	0
15	HS 0103+3219	bCG	01 06 03.6	+32 35 32						~	1	0
16	HS 0109+3304	G	01 12 30.61	+33 20 06.2						~	2	0
17	LEDA 101449	bCG	01 14 37.59	+21 31 17.7						~	9	0
18	LEDA 101450	G	01 16 40.2	+18 05 51						~	2	0
19	HS 0119+3059	bCG	01 22 14.721	+31 15 14.47						~	3	0
20	HS 0121+1753	bCG	01 24 00.0	+18 09 04						~	1	0
21	LEDA 101455	G	01 26 17.2	+16 40 29						~	2	0
22	HS 0127+2706	bCG	01 29 47.0	+27 22 20						~	1	0
23	HS 0128+2832	bCG	01 31 21.3	+28 48 12						~	11	0
24	HS 0131+1649	bCG	01 33 59.1	+17 04 44						~	1	0
25	HS 0134+3415	bCG	01 37 13.8	+34 31 12						~	8	0
26	EQ 013734+293553	SyG	01 40 24.1	+29 51 05		16.5				~	4	0
27	HS 0137+3152	bCG	01 40 41.8	+32 07 19						~	1	0
28	UGCA 20	bCG	01 43 14.6	+19 58 51		16				~	52	0
29	LEDA 101460	bCG	01 45 54.4	+24 15 54						~	3	0
30	HS 0205+3212	bCG	02 08 28.1	+32 27 05						~	1	0
31	HS 0248+2001	bCG	02 51 06.8	+20 13 42						~	1	0
32	[PBT2001] SBSG 0335-052 W	G	03 37 38.40	-05 02 37.5		19.14			18.85	~	99	1
33	SBSG 0335-052B	G	03 37 44.04	-05 02 40.2		16.77	16.65		16.79	~	154	1
34	LEDA 2790884	bCG	08 25 55.521	+35 32 31.96		18.2				~	106	1
35	Mrk 116	PaG	09 34 02.1	+55 14 25						~	1014	1
36	LEDA 39402	H2G	12 17 17.093	-28 02 32.67		17				~	127	0
37	NAME CVn I dwA	GiC	12 38 40.1	+32 45 59	16.91	16.66	16.73	16.62		~	199	0
38	MCG+07-29-060	QSO	14 17 01.716	+43 30 13.52		15.6				~	155	0
39	HS 2236+1344	bCG	22 38 31.1190793853	+14 00 29.769874980						~	34	0
40	HS 2252+2032	bCG	22 55 11.6	+20 48 48						~	1	0
41	SDSS J225515.31+180835.1	bCG	22 55 15.318	+18 08 35.17						~	2	0
42	IRAS F22565+2610	IR	22 58 57.2	+26 26 24						~	3	0
43	HS 2258+2046	bCG	23 00 32.2	+21 02 30						~	1	0
44	HS 2258+2215	bCG	23 00 43.2	+22 31 13						~	1	0
45	HS 2259+2357	bCG	23 01 38.027	+24 14 05.40						~	2	0
46	HS 2304+2255	bCG	23 07 18.9	+23 11 54						~	1	0
47	HS 2311+2631	bCG	23 13 48.0	+26 48 02						~	1	0
48	HS 2336+1800	bCG	23 38 46.8	+18 17 20						~	1	0
49	LEDA 1637449	bCG	23 42 38.2	+20 51 32						~	3	0
50	SDSS J235005.95+163506.9	bCG	23 50 05.959	+16 35 06.93						~	2	0
51	HS 2348+2920	bCG	23 50 50.4	+29 37 03						~	2	0
52	AGC 332347	bCG	23 54 56.7	+27 49 59						~	15	0

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