title: Kinematics of Nearby Subdwarfs And the Luminosity Function of the Galactic Thick Disk
creator: Arifyanto, Mochamad Ikbal
subject: ddc-520
subject: 520 Astronomy and allied sciences
description: We present an analysis of the space motions of 740 subdwarf stars based on the sample stars of Carney et al. (1994; CLLA). Hipparcos parallaxes and proper motion and Tycho2 proper motions were combined with radial velocities and metallicities from CLLA. The kinematical behavior is discussed in particular in relation to their metallicities. For stars  with metallicity -1.0<[Fe/H]<-0.4, the velocity distribution represent  the thick disk population. We derived the luminosity function of thick  disk using 1/V_{max} method. We found that the luminosity function in  absolute magnitude of M_V=4-5 mag, agree well with the Luminosity  function derived from the stellar initial function (Reyle & Robin 2001).  We analayzed the kinematics in our thick disk sample and found  substructure in the thick disk population.
date: 2005
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/6004/1/arifyanto_dissertation.pdf
identifier: DOI:10.11588/heidok.00006004
identifier: urn:nbn:de:bsz:16-opus-60043
identifier:   Arifyanto, Mochamad Ikbal  (2005) Kinematics of Nearby Subdwarfs And the Luminosity Function of the Galactic Thick Disk.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/6004/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng