2001ApJ...560..630L

Query : 2001ApJ...560..630L

2001ApJ...560..630L - Astrophys. J., 560, 630-635 (2001/October-3)

On the metallicity of star-forming dwarf galaxies.

LEGRAND F., TENORIO-TAGLE G., SILICH S., KUNTH D. and CERVINO M.

Abstract (from CDS):

We construct three extremely different scenarios of the star formation histories applicable to a sample of dwarf galaxies, based on either their present metallicity or their luminosity. The three possible scenarios imply different mechanical energy input rates, and these we compare with the theoretical lower limits established for the ejection of processed matter out of dwarf galaxies. The comparison strongly points to the existence of extended gaseous halos in these galaxies acting as the barrier that allows galaxies to retain their metals and enhance their abundance. At the same time, our findings strongly point to a continuous star-forming process, rather than to coeval bursts, as the main contributor to the overall metallicity in our galaxy sample.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Abundances - Galaxies: Evolution - Galaxies: Starburst - ISM: Abundances - ISM: Bubbles

Simbad objects: 23

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Number of rows : 23
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 IC 10 G 00 20 25.50 +59 17 17.0   13.6 9.5     ~ 1119 1
3 NGC 244 Sy2 00 45 46.4165696064 -15 35 48.392605716   14.1   13.04 13.4 ~ 88 0
4 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1236 2
5 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1241 3
6 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 564 3
7 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 769 0
8 UGC 3974 G 07 41 56.3059298112 +16 48 07.451632188   15.4       ~ 225 0
9 UGC 4459 GiG 08 34 07.20 +66 10 54.0 15.39 15.03 14.70 14.49   ~ 338 2
10 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 354 2
11 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 1106 1
12 NAME Sextans B H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 528 0
13 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 727 2
14 Mrk 33 AG? 10 32 31.956 +54 24 03.53 13.29 13.66 13.13 12.71 12.27 ~ 368 1
15 NGC 3353 AGN 10 45 22.390 +55 57 37.36 12.90 13.25 12.79     ~ 359 1
16 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 965 1
17 Mrk 1318 H2G 12 19 09.840 +03 51 23.34   14.5       ~ 165 0
18 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1125 1
19 UGC 8091 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 463 0
20 UGC 8308 AG? 13 13 22.839 +46 19 21.71   17       ~ 131 1
21 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1366 4
22 Mrk 829 GiP 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 209 0
23 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0

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