The radial velocity experiment (RAVE): second data release

Zwitter, T. and Siebert, A. and Munari, U. and Freeman, K. C. and Siviero, A. and Watson, F. G. and Fulbright, J. P. and Wyse, R. F. G. and Campbell, R. and Seabroke, G. M. and Williams, M. and Steinmetz, M. and Bienayme, O. and Gilmore, G. and Grebel, E. K. and Helmi, A. and Navarro, J. F. and Anguiano, B. and Boeche, C. and Burton, D. and Cass, C. J. C. and Dawe, J. and Fiegert, K. and Hartley, M. and Russell, K. and Veltz, L. and Bailin, J. and Binney, J. and Bland-Hawthorn, J. and Brown, A. and Dehnen, W. and Evans, N. W. and Fiorentin, P. R. and Fiorucci, M. and Gerhard, O. and Gibson, B. and Kelz, A. and Kujiken, K. and Matihevi, G. and Minchev, I. and Parker, Q. A. and Penarrubia, J. and Quillen, A. and Read, M. A. and Reid, W. and Ruchti, G. and Scholz, R. D. and Smith, M. C. and Sordo, R. and Tolstoi, E. and Tomasella, L. and Vidrih, S. and Wylie de Boer, E. (2008) The radial velocity experiment (RAVE): second data release. The Astronomical Journal, 136. pp. 421-451. ISSN 0004-6256

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Abstract

We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity, surface gravity, and rotational velocity) of up to one million stars using the 6 dF multi-object spectrograph on the 1.2 m UK Schmidt Telescope of the Anglo-Australian Observatory (AAO). The RAVE program started in 2003, obtaining medium resolution spectra (median R = 7500) in the Ca-triplet region (8410-8795 Å) for southern hemisphere stars drawn from the Tycho-2 and SuperCOSMOS catalogues, in the magnitude range 9 < I < 12. Following the first data release, the current release doubles the sample of published radial velocities, now containing 51,829 radial velocities for 49,327 individual stars observed on 141 nights between 2003 April 11 and 2005 March 31. Comparison with external data sets shows that the new data collected since 2004 April 3 show a standard deviation of 1.3 km s–1, about twice as good as for the first data release. For the first time, this data release contains values of stellar parameters from 22,407 spectra of 21,121 individual stars. They were derived by a penalized χ2 method using an extensive grid of synthetic spectra calculated from the latest version of Kurucz stellar atmosphere models. From comparison with external data sets, our conservative estimates of errors of the stellar parameters for a spectrum with an average signal-to-noise ratio (S/N) of ~40 are 400 K in temperature, 0.5 dex in gravity, and 0.2 dex in metallicity. We note however that, for all three stellar parameters, the internal errors estimated from repeat RAVE observations of 855 stars are at least a factor 2 smaller. We demonstrate that the results show no systematic offsets if compared to values derived from photometry or complementary spectroscopic analyses. The data release includes proper motions from Starnet2, Tycho-2, and UCAC2 catalogs and photometric measurements from Tycho-2 USNO-B, DENIS, and 2MASS. The data release can be accessed via the RAVE Web site: http://www.rave-survey.org and through CDS.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - No Department
Date Deposited: 23 Nov 2016 01:44
Last Modified: 19 Apr 2018 00:21
Uncontrolled Keywords: catalogs; stars: fundamental parameters; surveys
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1088/0004-6256/136/1/421
URI: http://eprints.usq.edu.au/id/eprint/26415

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