SIMBAD references

2012MNRAS.419.2844C - Mon. Not. R. Astron. Soc., 419, 2844-2854 (2012/February-1)

Local stellar kinematics from RAVE data - II. Radial metallicity gradient.

COSKUNOGLU B., AK S., BILIR S., KARAALI S., ONAL O., YAZ E., GILMORE G. and SEABROKE G.M.

Abstract (from CDS):

We investigate radial metallicity gradients for a sample of dwarf stars from the RAdial Velocity Experiment (RAVE) Data Release 3 (DR3). We select a total of approximately 17 000 F-type and G-type dwarfs, using a selection of colour, log g and uncertainty in the derived space motion, and calculate for each star a probabilistic (kinematic) population assignment to a thick or thin disc using space motion and additionally another (dynamical) assignment using stellar vertical orbital eccentricity. We additionally subsample by colour, to provide samples biased toward young thin-disc and older thin-disc stars. We derive a metallicity gradient as a function of Galactocentric radial distance, i.e. d[M/H]/dRm=-0.051±0.005 dex/kpc, for the youngest sample, F-type stars with vertical orbital eccentricities ev ≤ 0.04. Samples biased toward older thin-disc stars show systematically shallower abundance gradients.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): stars: abundances - Galaxy: abundances - Galaxy: disc - Galaxy: evolution

VizieR on-line data: <Available at CDS (J/MNRAS/419/2844): table2.dat>

Simbad objects: 14981

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