J/AN/329/790 SDSS and Johnson-Cousins photometry of F-K stars (Just+, 2008) ================================================================================ The main sequence from F to K stars of the solar neighbourhood in SDSS colours. Just A., Jahreiss H. =2008AN....329..790J ================================================================================ ADC_Keywords: Stars, nearby ; Photometry, SDSS ; Photometry, UBVRI Keywords: solar neighborhood - Galaxy: stellar content - stars: fundamental parameters - catalogs Abstract: 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', and i' show good agreement. Theoretical isochrones from Padua and from Dartmouth have still some problems, especially in the (r-i) colours. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file stars.dat 73 786 Luminosities and colours of the complete sample of 786 stars in the 25pc sphere -------------------------------------------------------------------------------- See also: V/70 : Nearby Stars, Preliminary 3rd Version (Gliese+ 1991) I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007) http://www.sdss.org : SDSS Home Page Byte-by-byte Description of file: stars.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 I6 --- HIP HIP number (0 for Sun) 10- 14 F5.3 mag g-r SDSS g-r colour index 17- 22 F6.3 mag r-i ? SDSS r-i colour index 26- 30 F5.3 mag gMAG Absolute g magnitude (1) 35- 39 F5.2 mag VMAG Absolute V magnitude (2) 44- 48 F5.3 mag B-V Johnson B-V colour index (2) 51- 56 F6.3 mag V-Rc ? Johnson-Cousins V-R colour index (2) 60- 64 F5.3 mag Rc-Ic ? Cousins R-I colour index (2) 68- 72 A5 --- CNS Catalog of Nearby Stars number (2) 73 A1 --- m_CNS [ABC] Multiplicity index on CNS -------------------------------------------------------------------------------- Note (1): from the C08 transformation, Chonis & Gascall (2008AJ....135..264C), 0.08