4.6 Article

Thin disk kinematics from RAVE and the solar motion

Journal

ASTRONOMY & ASTROPHYSICS
Volume 547, Issue -, Pages -

Publisher

EDP SCIENCES S A
DOI: 10.1051/0004-6361/201219462

Keywords

Galaxy: evolution; Galaxy: kinematics and dynamics; Galaxy: fundamental parameters

Funding

  1. John von Neumann - Institut fur Computing (NIC) - Germany [2979]
  2. German Research Foundation [Sonderforschungsbereich SFB 881, SPP 1177, SFB 881]
  3. Australian Astronomical Observatory
  4. Leibniz-Institut fuer Astrophysik Potsdam (AIP)
  5. Australian National University
  6. Australian Research Council
  7. French National Research Agency
  8. European Research Council [ERC-StG 240271 Galactica]
  9. Istituto Nazionale di Astrofisica at Padova
  10. Johns Hopkins University
  11. National Science Foundation of the USA [AST-0908326]
  12. W. M. Keck foundation
  13. Macquarie University
  14. Netherlands Research School for Astronomy
  15. Natural Sciences and Engineering Research Council of Canada
  16. Slovenian Research Agency
  17. Swiss National Science Foundation
  18. Science & Technology Facilities Council of the UK
  19. Opticon
  20. Strasbourg Observatory
  21. University of Groningen
  22. University of Heidelberg
  23. University of Sydney
  24. Science and Technology Facilities Council [ST/H00260X/1, ST/H00243X/1, ST/J001538/1] Funding Source: researchfish
  25. UK Space Agency [PP/D006570/1, ST/K00056X/1, ST/I000852/1] Funding Source: researchfish
  26. STFC [ST/J001538/1, ST/H00260X/1] Funding Source: UKRI

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Aims. We study the Milky Way (MW) thin disk with the RAdial Velocity Experiment (RAVE) survey. We consider the thin and thick disks as different Galactic components and present a technique to statistically disentangle the two populations. Then we focus our attention on the thin disk component. Methods. We disentangle the thin disk component from a mixture of the thin and thick disks using a data set providing radial velocities, proper motions, and photometrically determined distances. Results. We present the trend of the velocity dispersions in the thin disk component of the MW in the radial direction above and below the Galactic plane using data from the RAVE. The selected sample is a limited subsample from the entire RAVE catalogue, roughly mapping up to 500 pc above and below the Galactic plane, a few degrees in azimuthal direction and covering a radial extension of 2.0 kpc around the solar position. The solar motion relative to the local standard of rest is also re-determined with the isolated thin disk component. Major results are the trend of the velocity mean and dispersion in the radial and vertical direction. In addition the azimuthal components of the solar motion relative to the local standard of rest and the velocity dispersion are discussed.

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