2003A&A...401..141L

Query : 2003A&A...401..141L

2003A&A...401..141L - Astronomy and Astrophysics, volume 401, 141-159 (2003/4-1)

Nebular abundances of nearby southern dwarf galaxies.

LEE H., GREBEL E.K. and HODGE P.W.

Abstract (from CDS):

The results of optical spectroscopy of HII regions in a sample of southern dwarf irregulars consisting of five dwarf galaxies in the Centaurus A group, four dwarfs in the Sculptor group, and eight additional dwarf galaxies are presented. Oxygen abundances are derived using the direct method where [O III]λ4363 is detected; otherwise, abundances are derived with the bright-line method using the McGaugh and the Pilyugin calibrations. ESO358-G060 has the lowest oxygen abundance (12+log(O/H)=7.32) in the sample, which is comparable to the value for the second most metal-poor galaxy known (SBS 0335-052). In all, new oxygen abundances are reported for nine dwarf galaxies; updated values are presented for the remaining galaxies. Derived oxygen abundances are in the range from 3% to 26% of the solar value. Oxygen abundances for dwarfs in the southern sample are consistent with the metallicity-luminosity relationship defined by a control sample of dwarf irregulars with [O III]λ4363 abundances and well-measured distances. However, NGC 5264 appears to have an (upper branch) oxygen abundance approximately two to three times higher than other dwarfs at similar luminosities. Nitrogen-to-oxygen and neon-to-oxygen abundance ratios are also reported; in particular, IC 1613 and IC 5152 show elevated nitrogen-to-oxygen ratios for their oxygen abundances.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: clusters: individual: Centaurus A, Sculptor - galaxies: dwarf - galaxies: evolution - galaxies: irregular

Simbad objects: 46

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Number of rows : 46
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 Scl Group GrG 01 00 06 -33 44.2           ~ 507 0
2 [HLG90] 13 HII 01 04 48.0 +02 06 33           ~ 8 0
3 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1235 2
4 [HLG90] 37 HII 01 05 03.3 +02 04 24           ~ 19 0
5 LEDA 166061 AG? 01 08 21.93 -38 12 34.5           ~ 29 0
6 CD-28 595 PM* 01 54 50.2703221766 -27 28 35.739139915   12.06 11.51     ~ 130 0
7 SBSG 0335-052 bCG 03 37 44.06 -05 02 40.2     16.65     ~ 471 1
8 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 1823 0
9 ESO 358-60 GiC 03 45 12.14 -35 34 15.3   15.86   15.46 16.6 ~ 73 0
10 LP 995-86 Pe* 03 48 22.6125679056 -39 08 37.013680104   13.61 13.15     F 100 0
11 ESO 302-14 GiG 03 51 40.90 -38 27 08.0   14.84   14.54 14.8 ~ 53 0
12 [WLH83] 0355-465A HII 03 57 21.4 -46 22 04           ~ 2 0
13 ESO 249-32 GiP 03 57 22.41 -46 22 13.8   16.35   15.61   ~ 12 0
14 NGC 1493 Sy2 03 57 27.4270810416 -46 12 38.513195316   11.88   11.01 11.6 ~ 133 0
15 IC 2032 EmG 04 07 03.04 -55 19 25.8   14.78 14.73 13.96 14.5 ~ 34 0
16 NAME NGC 1566 Group GrG 04 20 00.6 -54 56 17           ~ 151 0
17 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 353 2
18 NAME NGC 3109 Group GrG 09 59 35.2 -12 49 52           ~ 38 0
19 [RM92] HII 6 HII 10 03 03.6 -26 09 19           ~ 8 0
20 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 769 2
21 CD-34 6792 PM* 10 32 13.6185546336 -35 37 41.711776068   12.84 11.84     F:wl: 149 0
22 HD 105183 HS* 12 06 47.2348389600 +11 40 12.659833056   10.93 11.06     sdB8IIIHe2 120 0
23 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6637 0
24 NGC 4532 GiP 12 34 19.329 +06 28 03.73   12.3       ~ 286 2
25 [WLH83] 1243-335B HII 12 45 58.7 -33 50 01           ~ 2 0
26 ESO 381-20 AG? 12 46 00.67 -33 50 13.0   14.24   13.50 14.0 ~ 88 0
27 UGCA 320 GiP 13 03 16.736 -17 25 22.91 13.98 13.42 13.09 12.96 13.3 ~ 122 0
28 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 263 0
29 AM 1324-411 G 13 27 -41.4           ~ 3 0
30 ESO 324-24 LSB 13 27 37.6117 -41 28 44.128   12.91   12.13 12.3 ~ 100 0
31 ESO 444-84 GiC 13 37 19.99 -28 02 42.0 16.04 15.34 15.05 15.05 14.9 ~ 121 1
32 NGC 5264 GiG 13 41 36.683 -29 54 47.25 13.86 12.96 12.39 12.14 15.83 ~ 152 1
33 NAME TR 1346-35 EmG 13 49 17.5109711256 -36 03 48.860478360   11.00   10.11   ~ 111 1
34 [WLH83] 1346-358A HII 13 49 17.7 -36 03 28           ~ 2 0
35 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 211 0
36 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 307 1
37 [SHK91] SagDIG 3 HII 19 30 02.6 -17 41 26           ~ 5 0
38 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
39 IC 5152 AG? 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 252 1
40 [WLH83] IC 5152A HII 22 02 46.0 -51 17 38           ~ 3 0
41 LP 877-23 PM* 22 52 41.0353986762 -20 35 32.994432457   13.02 11.90     ~ 113 0
42 ESO 347-17 GiG 23 26 56.21 -37 20 48.9 14.90 14.69 14.35 14.19 14.2 ~ 67 0
43 [M96b] ESO 471-06 2 HII 23 43 45.3 -31 57 35           ~ 4 0
44 ESO 471-6 G 23 43 45.549 -31 57 24.37 14.55 14.03 13.73 13.63   ~ 147 1
45 ESO 348-9 AG? 23 49 23.4984 -37 46 25.536   14.6   14.7 14.4 ~ 58 0
46 NAME Local Group GrG ~ ~           ~ 8385 0

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