Star formation histories of local group dwarf galaxies

We present the study of the star formation histories (SFHs) of a sample of Local Group dwarf galaxies (LGDGs), via the analysis and modelling, with the means of an evolutionary stellar population synthesis of their colour-magnitude (CM) diagrams. It appears that important parameters to describe the...

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Published inAstrophysics and space science Vol. 284; no. 2; pp. 589 - 594
Main Authors Ikuta, C, Arimoto, N, Jablonka, P
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.01.2003
Springer Verlag
Subjects
Astronomy
Astrophysics
Galaxies
Physics
Star & galaxy formation
Stars
Stars & galaxies
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Summary:We present the study of the star formation histories (SFHs) of a sample of Local Group dwarf galaxies (LGDGs), via the analysis and modelling, with the means of an evolutionary stellar population synthesis of their colour-magnitude (CM) diagrams. It appears that important parameters to describe the SFHs are star formation rate (SFR) and duration of star formation. We find a possible correlation between the mass and the SFRs. The correlation might be the origin of the observed luminosity-metallicity relation in the LGDGs. A well-defined correlation between the durations of star formation and the distance from M31 or the Galaxy indicates that the current early-type dwarf galaxies should have been transformed from late-type by strong tidal force of the massive galaxies.
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ISSN:0004-640X
1572-946X
DOI:10.1023/A:1024058022841