The main sequence from F to K stars of the solar neighbourhood in SDSS colours

Details The main sequence from F to K stars of the solar neighbourhood in SDSS colours The main sequence from F to K stars of the solar neighbourhood in SDSS colours

2008-08-15

arxiv.org/abs/0808.2111v1

Astronomy and Astrophysics

Astrophysics

11 pages, 15 figures, 1 online table available at ftp://ftp.ari.uni-heidelberg.de/staff/just/stars.tab, accepted by AN

Scientific paper

10.1002/asna.200811030

For an understanding of Galactic stellar populations in the SDSS filter system well defined stellar samples are needed. The nearby stars provide a complete stellar sample representative for the thin disc population. We compare the filter transformations of different authors applied to the main sequence stars from F to K dwarfs to SDSS filter system and discuss the properties of the main sequence. The location of the mean main sequence in colour-magnitude diagrams is very sensitive to systematic differences in the filter transformation. A comparison with fiducial sequences of star clusters observed in g',r',i' show good agreement. Theoretical isochrones from Padua and from Dartmouth have still some problems especially in (r-i)-colour.

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