THE RADIAL VELOCITY EXPERIMENT (RAVE): FOURTH DATA RELEASE

Abstract

We present the stellar atmospheric parameters (effective temperature, surface\ngravity, overall metallicity), radial velocities, individual abundances and\ndistances determined for 425 561 stars, which constitute the fourth public data\nrelease of the RAdial Velocity Experiment (RAVE). The stellar atmospheric\nparameters are computed using a new pipeline, based on the algorithms of\nMATISSE and DEGAS. The spectral degeneracies and the 2MASS photometric\ninformation are now better taken into consideration, improving the parameter\ndetermination compared to the previous RAVE data releases. The individual\nabundances for six elements (magnesium, aluminum, silicon, titanium, iron and\nnickel) are also given, based on a special-purpose pipeline which is also\nimproved compared to that available for the RAVE DR3 and Chemical DR1 data\nreleases. Together with photometric information and proper motions, these data\ncan be retrieved from the RAVE collaboration website and the Vizier database.\n