Distance determination for RAVE stars using stellar models

Details Distance determination for RAVE stars using stellar models Distance determination for RAVE stars using stellar models

2010-03-03

arxiv.org/abs/1003.0758v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

17 pages, 18 figures, data and future updates available at http://www.astro.rug.nl/~rave, accepted for publication in A&A

Scientific paper

(Abridged) Aims:We develop a method for deriving distances from spectroscopic data and obtaining full 6D phase-space coordinates for the RAVE survey's second data release. Methods: We used stellar models combined with atmospheric properties from RAVE (Teff, logg and [Fe/H]) and (J-Ks) photometry from archival sources to derive absolute magnitudes. We are able to derive the full 6D phase-space coordinates for a large sample of RAVE stars. This method is tested with artificial data, Hipparcos trigonometric parallaxes and observations of the open cluster M67. Results: When we applied our method to a set of 16 146 stars, we found that 25% (4 037) of the stars have relative (statistical) distance errors of < 35%, while 50% (8 073) and 75% (12 110) have relative (statistical) errors smaller than 45% and 50%, respectively. Our various tests show that we can reliably estimate distances for main-sequence stars, but there is an indication of potential systematic problems with giant stars. For the main-sequence star sample (defined as those with log(g) > 4), 25% (1 744) have relative distance errors < 31%, while 50% (3 488) and 75% (5 231) have relative errors smaller than 36% and 42%, respectively. Our full dataset shows the expected decrease in the metallicity of stars as a function of distance from the Galactic plane. The known kinematic substructures in the U and V velocity components of nearby dwarf stars are apparent in our dataset, confirming the accuracy of our data and the reliability of our technique. We provide independent measurements of the orientation of the UV velocity ellipsoid and of the solar motion, and they are in very good agreement with previous work. Conclusions: The distance catalogue for the RAVE second data release is available at http://www.astro.rug.nl/~rave

Affiliated with

Also associated with

No associations

Rating

Distance determination for RAVE stars using stellar models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Distance determination for RAVE stars using stellar models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance determination for RAVE stars using stellar models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-684231