2019A&A...623A..40I

Query : 2019A&A...623A..40I

2019A&A...623A..40I - Astronomy and Astrophysics, volume 623A40-40 (2019/3-1)

Low-redshift lowest-metallicity star-forming galaxies in the SDSS DR14.

IZOTOV Y.I., GUSEVA N.G., FRICKE K.J. and HENKEL C.

Abstract (from CDS):

We present a sample of low-redshift (z<0.133) candidates for extremely low-metallicity star-forming galaxies with oxygen abundances 12+logO/H<7.4 selected from the Data Release 14 (DR14) of the Sloan Digital Sky Survey (SDSS). Three methods are used to derive their oxygen abundances. Among these methods two are based on strong [OII]λ3727Å, [OIII]λ4959Å, and [OIII]λ5007Å emission lines, which we call strong-line and semi-empirical methods. These were applied for all galaxies. We have developed one of these methods, the strong-line method, in this paper. This method is specifically focused on the accurate determination of metallicity in extremely low-metallicity galaxies and may not be used at higher metallicities with 12+logO/H≥7.5. The third, the direct Te method, was applied for galaxies with detected [OIII]λ4363 emission lines. All three methods give consistent abundances and can be used in combination or separately for selection of lowest-metallicity candidates. However, the strong-line method is preferable for spectra with a poorly detected or undetected [OIII]λ4363 emission line. In total, our list of selected candidates for extremely low-metallicity galaxies includes 66 objects.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: abundances - galaxies: irregular - galaxies: evolution - galaxies: formation - galaxies: ISM - HII regions

CDS comments: In ref list Hirschauer 2016 is 2016ApJ...822..108H, not 2016ApJ...822...13H.

Simbad objects: 72

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Number of rows : 72
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 SDSS J000648.96+241306.9 G 00 06 48.96024 +24 13 06.9456           ~ 2 0
2 AGC 103435 LSB 00 15 20.679 +01 04 36.99           ~ 19 0
3 SDSS J002949.49-002539.8 G 00 29 49.45346 -00 25 40.5491           ~ 5 0
4 SDSS J004233.36+324721.0 G 00 42 33.360 +32 47 21.03           ~ 3 0
5 SDSS J010609.16+234533.6 G 01 06 09.16896 +23 45 33.6564           ~ 2 0
6 SDSS J010746.52+010351.6 G 01 07 46.52040 +01 03 51.6564           ~ 1 0
7 MCG+00-04-043 LSB 01 13 40.450 +00 52 39.16   17       ~ 65 0
8 SDSS J012241.60+004842.0 G 01 22 41.62199 +00 48 42.0923           ~ 5 0
9 SDSS J013740.99+203246.5 G 01 37 40.99001 +20 32 46.5109           ~ 1 0
10 SDSS J014315.15+195806.0 G 01 43 15.15240 +19 58 06.0924           ~ 3 0
11 SDSS J015311.96+010440.1 G 01 53 11.959 +01 04 40.13           ~ 4 0
12 SDSS J020724.78-082143.1 G 02 07 24.78530 -08 21 43.1223           ~ 2 0
13 SDSS J022238.53-093535.3 G 02 22 38.531 -09 35 35.29           ~ 3 0
14 SDSS J022302.70-091822.5 G 02 23 02.70559 -09 18 22.5933           ~ 2 0
15 SDSS J024712.79-040431.3 G 02 47 12.79656 -04 04 31.3572           ~ 1 0
16 LEDA 1125628 H2G 03 14 26.103 -01 08 47.03           ~ 8 0
17 [PBT2001] SBSG 0335-052 W G 03 37 38.40 -05 02 37.5   19.14     18.85 ~ 110 1
18 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 220 1
19 SDSS J080856.34+324419.2 G 08 08 56.34216 +32 44 19.2192           ~ 2 0
20 SDSS J081152.12+473026.2 G 08 11 52.118 +47 30 26.25           ~ 41 0
21 SDSS J083437.18+590536.0 bCG 08 34 37.218 +59 05 36.44           ~ 7 0
22 LEDA 1737674 AG? 09 06 00.918 +25 28 11.25           ~ 14 0
23 SDSS J091159.43+313535.9 AG? 09 11 59.434 +31 35 35.92           ~ 15 0
24 SDSS J092136.55+403853.8 G 09 21 36.55272 +40 38 53.8440           ~ 2 0
25 Mrk 116A H2G 09 34 01.9716600456 +55 14 27.789835056           ~ 46 0
26 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
27 Mrk 116B EmG 09 34 02.389 +55 14 23.14           ~ 62 0
28 NAME Leoncino Dwarf Galaxy bCG 09 43 32.356 +33 26 57.65           ~ 58 0
29 SDSS J094444.58+093649.1 G 09 44 44.58552 +09 36 49.1184           ~ 1 0
30 SDSS J094519.54+383552.9 G 09 45 19.554 +38 35 52.88           ~ 4 0
31 LEDA 4090593 G 09 49 35.085 +34 26 16.43           ~ 2 1
32 UGC 5272 B AG? 09 50 19.484 +31 27 22.22   17.53       ~ 37 0
33 SDSS J095531.44+644250.0 AG? 09 55 31.447 +64 42 50.07           ~ 5 0
34 Z 153-5 AG? 09 56 46.047 +28 49 43.77 14.82 14.74 14.59 14.55 26.509 ~ 252 1
35 SDSS J095905.73+462650.5 G 09 59 05.738 +46 26 50.52           ~ 7 0
36 SDSS J100036.54+303209.7 AG? 10 00 36.545 +30 32 09.78           ~ 19 0
37 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 268 0
38 LEDA 5059102 AG? 10 34 05.399 +15 46 50.13           ~ 11 0
39 SDSS J103639.46+203615.8 G 10 36 39.465 +20 36 15.80           ~ 4 0
40 SDSS J104442.66+630602.0 bCG 10 44 42.669 +63 06 02.09           ~ 23 0
41 SDSS J105321.32+471320.8 G 10 53 21.32988 +47 13 20.8466           ~ 2 0
42 LEDA 5064998 AG? 11 09 09.523 +20 07 29.68           ~ 9 0
43 LEDA 1367320 EmG 11 19 28.100 +09 35 44.29           ~ 26 0
44 SDSS J112146.67+374421.1 AG? 11 21 46.675 +37 44 21.16           ~ 7 0
45 LEDA 5064988 AG? 11 39 31.77720 +19 17 24.8172           ~ 8 0
46 SDSS J115328.19+341921.8 AG? 11 53 28.237 +34 19 20.68           ~ 5 0
47 LEDA 4573208 AG? 11 57 44.106 +17 13 29.13           ~ 6 0
48 LEDA 2543081 LSB 11 57 54.213 +56 38 16.77           ~ 28 0
49 SDSS J120608.52+500721.1 G 12 06 08.52984 +50 07 21.1656           ~ 3 0
50 SDSS J120809.74+372724.6 AG? 12 08 09.744 +37 27 24.59           ~ 7 0
51 SDSS J122051.60+491555.1 G 12 20 51.602 +49 15 55.14           ~ 5 0
52 LEDA 4324796 G 12 23 58.195 +07 27 01.70           ~ 17 0
53 LEDA 40766 LSB 12 26 55.693 +09 52 56.28   18       ~ 42 0
54 SDSS J122845.54-012526.8 G 12 28 45.543 -01 25 26.86           ~ 3 0
55 SDSS J123415.69+390116.4 bCG 12 34 15.69576 +39 01 16.4136           ~ 21 0
56 SDSS J123552.35+275554.1 G 12 35 52.353 +27 55 54.18           ~ 3 0
57 NGC 4657 H2G 12 44 11.1670559544 +32 12 21.714186852           ~ 19 0
58 MCG+03-33-011 LSB 12 50 31.278 +17 28 15.89   18       ~ 27 0
59 SDSS J125740.55+334139.2 AG? 12 57 40.549 +33 41 39.22           ~ 10 0
60 Z 71-87 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 475 0
61 LEDA 1614069 LSB 13 08 28.407 +20 02 01.90           ~ 14 0
62 LEDA 4361440 AG? 13 14 59.17160 +24 38 39.1363           ~ 4 0
63 Z 101-17 EmG 13 15 56.265 +17 45 37.41   15.70       ~ 25 0
64 2dFGRS TGN206Z232 bCG 14 14 54.149 -02 08 22.92   18.065   17.598   ~ 25 0
65 SDSS J142419.48+520038.3 G 14 24 19.48267 +52 00 38.3338           ~ 1 0
66 SDSS J143321.29+154421.6 G 14 33 21.29088 +15 44 21.6312           ~ 1 0
67 MCG+07-30-055 H2G 14 44 12.8032800372 +42 37 43.773570223   16.0       ~ 92 0
68 SDSS J152255.54+420158.2 AG? 15 22 55.543 +42 01 58.29           ~ 5 0
69 LEDA 4123676 AG? 16 40 21.437 +28 45 55.90           ~ 10 0
70 SDSS J170311.59+212621.1 G 17 03 11.59104 +21 26 21.1776           ~ 1 0
71 LEDA 1139658 G 21 04 55.310 -00 35 22.38           ~ 33 0
72 NAME Eridanus Void vid ~ ~           ~ 33 0

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