The evolution of the stellar populations in low surface brightness galaxies

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dc.creatorHoek, L. B. van den
dc.creatorde Blok, W. J. G.
dc.creatorvan der Hulst, J. M.
dc.creatorde Jong, T.
dc.creator.
dc.date2000-03-15
dc.date.accessioned2026-07-07T01:52:45Z
dc.date.available2026-07-07T01:52:45Z
dc.descriptionWe 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 depen dent 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 (M_{gas}/(M_{gas}+M_{stars}) = 0.5 for a galaxy age of 14 Gyr. For some galaxies small amplitude star formation bursts are required to explain the contribution of the young (5-50 Myr 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.
dc.descriptionTo be published in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0003224
dc.identifierhttp://arxiv.org/abs/astro-ph/0003224
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/727
dc.subjectAstrophysics
dc.titleThe evolution of the stellar populations in low surface brightness galaxies
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