2001MNRAS.323..555L

Query : 2001MNRAS.323..555L

2001MNRAS.323..555L - Mon. Not. R. Astron. Soc., 323, 555-576 (2001/May-3)

The chemical evolution of gas-rich dwarf galaxies.

LARSEN T.I., SOMMER-LARSEN J. and PAGEL B.E.J.

Abstract (from CDS):

In an effort to understand the evolution of N, O and He abundances in gas-rich dwarf galaxies, we investigate the dispersion and mixing of supernova ejecta in relation to Hii region evolution and develop a numerical model of chemical evolution based on a double-bursting mode of star formation (with an interval of the order of 3x107yr between bursts of a pair) which has been designed to account for the existence of significant scatter in the N/O-O/H relation.

The dependence of the abundances on gas fraction is explored on the basis of this and similar models, in combination with various hypotheses concerning inflow and selective and non-selective outflow. The gas fractions are uncertain within wide limits for blue compact galaxies, but are more well defined for some dwarf irregulars. Selective winds do not give a good fit to N/O, while closed models and models with non-selective winds with or without inflow are all found to be viable.


Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): methods: numerical - Hii regions - galaxies: abundances - galaxies: dwarf - galaxies: irregular - galaxies: starburst

Simbad objects: 28

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Number of rows : 28
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 PHL 957 QSO 01 03 11.2741573824 +13 16 17.809871484   16.97 16.57     ~ 350 0
3 Z 415-15 AG? 02 51 04.57 +04 27 13.9 14.76 15.07 14.70 14.50 14.29 ~ 127 0
4 SBSG 0335-052 AGN 03 37 44.06 -05 02 40.2     16.65     ~ 500 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
7 Mrk 5 H2G 06 42 15.53 +75 37 32.6   17.0       ~ 114 0
8 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 588 3
9 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
10 LEDA 2800845 G 07 53 41.6 +56 41 52   18.0       ~ 23 0
11 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
12 MCG+05-26-046 SBG 11 04 58.298 +29 08 16.54   15.5 15.29     ~ 228 0
13 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
14 Z 242-46 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 242 1
15 Z 244-18 bCG 12 26 15.69 +48 29 38.3   15.3       ~ 364 0
16 Mrk 59 rG 12 59 00.288 +34 50 42.45           ~ 319 2
17 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 389 2
18 QSO B1331+170 Bla 13 33 35.7827544072 +16 49 04.013500728   16.84 16.71 16.41   ~ 469 1
19 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
20 Mrk 67 EmG 13 41 56.4808997304 +30 31 09.652262088   16.5       ~ 96 0
21 NGC 5455 H2G 14 03 01.17 +54 14 29.4           ~ 105 0
22 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
23 NGC 5461 HII 14 03 40.96 +54 19 02.4           ~ 195 0
24 Z 193-4 H2G 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 212 0
25 Z 274-49 bCG 15 37 04.237 +55 15 47.60   15.2       ~ 136 0
26 QSO B1946+770 QSO 19 44 54.8532392016 +77 05 52.673448048     15.8     ~ 156 0
27 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
28 QSO B2343+125 QSO 23 46 28.200 +12 49 00.00     17.5     ~ 143 2

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