Mon. Not. R. Astron. Soc., 436, 1343-1361 (2013/December-1)
Calibration of RAVE distances to a large sample of Hipparcos stars.
Abstract (from CDS):
A magnitude-limited population of 18808 Hipparcos stars is used to calibrate distances for 52794 RAdial Velocity Experiment (RAVE) stars, including dwarfs, giants and pre-main-sequence stars. I give treatments for a number of types of bias affecting calculation, including bias from the non-linear relationship between the quantity of interest (e.g., distance or distance modulus) and the measured quantity (parallax or visual magnitude), the Lutz-Kelker bias and bias due to variation in density of the stellar population. The use of a magnitude bound minimizes the Malmquist and the Lutz-Kelker bias, and avoids measurement bias resulting from the greater accuracy of Hipparcos parallaxes for brighter stars. The calibration is applicable to stars in 2MASS when there is some way to determine stellar class with reasonable confidence. For RAVE this is possible for hot dwarfs and using logg. The accuracy of the calibration is tested against Hipparcos stars with better than 2 percent parallax errors, and by comparison of the RAVE velocity distribution with that of Hipparcos, and is found to improve upon previous estimates of luminosity distance. An estimate of the local standard of rest from RAVE data, (U0, V0, W0) = (14.9±1.7, 15.3±0.4, 6.9±0.1)km/s, shows excellent agreement with the current best estimate from extended Hipparcos compilation. The RAVE velocity distribution confirms the alignment of stellar motions with spiral structure.
© 2013 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
stars: statistics - Galaxy: kinematics and dynamics - solar neighbourhood - Galaxy: structure
VizieR on-line data:
<Available at CDS (J/MNRAS/436/1343): dwarfs.dat oclasses.dat>
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