Local stellar kinematics from RAVE data: III. Radial and Vertical Metallicity Gradients based on Red Clump Stars

We investigate radial and vertical metallicity gradients for a sample of red clump stars from the RAdial Velocity Experiment (RAVE) Data Release 3. We select a total of 6781 stars, using a selection of colour, surface gravity and uncertainty in the derived space motion, and calculate for each star a...

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Bibliographic Details
Published in:arXiv.org 2012-01
Main Authors: Bilir, S, Karaali, S, S Ak, Onal, O, Dagtekin, N D, Yontan, T, Gilmore, G, Seabroke, G M
Format: Article
Language:English
Subjects:
Abundance
Eccentric orbits
Giant stars
Metallicity
Radial velocity
Stars
Statistical analysis
Stellar kinematics
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Summary:We investigate radial and vertical metallicity gradients for a sample of red clump stars from the RAdial Velocity Experiment (RAVE) Data Release 3. We select a total of 6781 stars, using a selection of colour, surface gravity and uncertainty in the derived space motion, and calculate for each star a probabilistic (kinematic) population assignment to a thin or thick disc using space motion and additionally another (dynamical) assignment using stellar vertical orbital eccentricity. We derive almost equal metallicity gradients as a function of Galactocentric distance for the high probability thin disc stars and for stars with vertical orbital eccentricities consistent with being dynamically young, e_v
ISSN:2331-8422
DOI:10.48550/arxiv.1201.3065