2000A&A...357..397V

Query : 2000A&A...357..397V

2000A&A...357..397V - Astronomy and Astrophysics, volume 357397-413 (2000/5-2)

The evolution of the stellar populations in low surface brightness galaxies.

VAN DEN HOEK L.B., DE BLOK W.J.G., VAN DER HULST J.M. and DE JONG T.

Abstract (from CDS):

We investigate the star formation history and chemical evolution of low surface brightness (LSB) disk galaxies by modelling their observed spectro-photometric and chemical properties using a galactic chemical and photometric evolution model incorporating a detailed metallicity dependent set of stellar input data. For a large fraction of the LSB galaxies in our sample, observed properties are best explained by models incorporating an exponentially decreasing global star formation rate (SFR) ending at a present-day gas fraction Mgas/(Mgas+Mstars)=0.5 for a galaxy age of 14Gyr. For some galaxies small amplitude star formation bursts are required to explain the contribution of the young (5-50Myr old) stellar population to the galaxy integrated luminosity. This suggests that star formation has proceeded in a stochastic manner. The presence of an old stellar population in many late-type LSB galaxies suggests that LSB galaxies roughly follow the same evolutionary history as HSB galaxies, except at a much lower rate. In particular, our results imply that LSB galaxies do not form late, nor have a delayed onset of star formation, but simply evolve slowly.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - galaxies: fundamental parameters - galaxies: formation - galaxies: spiral

Simbad objects: 17

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Number of rows : 17
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 MCG+06-01-019 LSB 00 13 50.90 +35 59 39.0   16.5       ~ 105 1
2 MCG+03-03-013 LSB 01 00 51.98838 +19 28 33.4966   17       ~ 54 0
3 MCG+04-05-005 LSB 01 45 32.251 +25 31 17.28   17       ~ 92 0
4 AGC 180072 LSB 08 09 32.6 +22 33 34           ~ 49 0
5 LEDA 86665 LSB 08 46 37.90 +18 53 23.7   17.21       ~ 51 0
6 LSB F563-1 LSB 08 55 01.4 +19 45 06           ~ 73 0
7 LEDA 86668 LSB 09 02 53.357 +20 04 32.21   16.9       ~ 108 0
8 LEDA 86670 LSB 09 37 36.6 +21 46 15           ~ 53 0
9 LEDA 86618 LSB 10 17 56.3 +21 03 41           ~ 26 0
10 LEDA 86619 G 10 26 06.360 +22 26 00.96           ~ 75 0
11 LSB F568-3 LSB 10 26 59 +22 13.6           ~ 81 0
12 LEDA 86672 LSB 10 45 02.064 +22 03 15.54           ~ 91 0
13 LEDA 86674 LSB 11 26 19.08 +18 50 09.3           ~ 57 0
14 LSB F571-5 LSB 11 30 25.7 +20 35 37           ~ 11 0
15 LSB F574-2 LSB 12 46 47.3 +21 48 12           ~ 27 0
16 LEDA 86676 LSB 13 50 10.08448 +18 16 07.6585           ~ 26 0
17 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 424 1

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