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The luminosity function of nearby thick-disk sub-dwarfs

Published online by Cambridge University Press:  01 October 2007

M. I. Arifyanto
M. I. Arifyanto*
Affiliation:
Astronomy Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung, 40132, Indonesia email: ikbal@as.itb.ac.d
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Abstract

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We derived the luminosity function of thick disk using V/Vmax method for nearby sub-dwarf stars based on the sample stars of Carney et al. (1994). Hipparcos parallaxes and proper motions and Tycho2 proper motions were combined with radial velocities and metallicities from CLLA. We found that the luminosity function in the absolute magnitude range MV = 4–6 mag agree well with the luminosity function derived from the initial mass function (Reyle & Robin 2001).

Keywords

Galaxy: generalGalaxy: diskstars: fundamental parameters (luminosities, masses)subdwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 484 - 485
Copyright
Copyright © International Astronomical Union 2008

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