The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era

Casey, Andrew R.; Hawkins, Keith; Hogg, David W.; Ness, Melissa; Rix, Hans Walter; Kordopatis, Georges; Kunder, Andrea; Steinmetz, Matthias; Koposov, Sergey; Enke, Harry; Sanders, Jason; Gilmore, Gerry; Zwitter, Tomaž; Freeman, Kenneth C.; Casagrande, Luca; Matijevi?, Gal; Seabroke, George; Bienaymé, Olivier; Bland-Hawthorn, Joss; Gibson, Brad K.; Grebel, Eva K.; Helmi, Amina; Munari, Ulisse; Navarro, Julio F.; Reid, Warren; Siebert, Arnaud; Wyse, Rosemary

Abstract

The orbits, atmospheric parameters, chemical abundances, and ages of individual stars in the Milky Way provide the most comprehensive illustration of galaxy formation available. The Tycho-Gaia Astrometric Solution (TGAS) will deliver astrometric parameters for the largest ever sample of Milky Way stars, though its full potential cannot be realized without the addition of complementary spectroscopy. Among existing spectroscopic surveys, the RAdial Velocity Experiment (RAVE) has the largest overlap with TGAS (200,000 stars). We present a data-driven re-analysis of 520,781 RAVE spectra using The Cannon. For red giants, we build our model using high-fidelity APOGEE stellar parameters and abundances for stars that overlap with RAVE. For main sequence and sub-giant stars, our model uses stellar parameters from the K2/EPIC. We derive and validate effective temperature Teff, surface gravity log g, and chemical abundances of up to seven elements (O, Mg, Al, Si, Ca, Fe, and Ni). We report a total of 1,685,851 elemental abundances with a typical precision of 0.07 dex, a substantial improvement over previous RAVE data releases. The synthesis of RAVE-on and TGAS is the most powerful data set for chemo-dynamic analyses of the Milky Way ever produced.

Citation

Casey, A. R., Hawkins, K., Hogg, D. W., Ness, M., Rix, H. W., Kordopatis, G., Kunder, A., Steinmetz, M., Koposov, S., Enke, H., Sanders, J., Gilmore, G., Zwitter, T., Freeman, K. C., Casagrande, L., Matijevič, G., Seabroke, G., Bienaymé, O., Bland-Hawthorn, J., Gibson, B. K., …Wyse, R. (2017). The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era. The Astrophysical journal, 840(1), 59. https://doi.org/10.3847/1538-4357/aa69c2

• Acceptance Date: Mar 23, 2017
• Online Publication Date: May 4, 2017
• Publication Date: May 4, 2017
• Deposit Date: May 13, 2017
• Publicly Available Date: May 15, 2018
• Journal: The Astrophysical Journal
• Print ISSN: 0004-637X
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 840
• Issue: 1
• Pages: 59
• DOI: https://doi.org/10.3847/1538-4357/aa69c2
• Keywords: Space and Planetary Science; Astronomy and Astrophysics
• Public URL: https://hull-repository.worktribe.com/output/502698
• Additional Information: Journal title: The Astrophysical Journal; Article type: paper; Article title: The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in theGaiaEra; Copyright information: © 2017. The American Astronomical Society. All rights reserved.; Date received: 2016-11-24; Date accepted: 2017-03-23; Online publication date: 2017-05-04
• Contract Date: May 13, 2017