Velocity-space substructure from nearby RAVE and SDSS stars

Chang Hoon Hahn, J. A. Sellwood, Carlton Pryor

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We extract a sample of disc stars within 200pc of the Sun from the RAVE and SDSS surveys. Distances are estimated photometrically and proper motions are from ground-based data. We show that the velocity-space substructure first revealed in the Geneva-Copenhagen sample is also present in this completely independent sample. We also evaluate action-angle variables for these stars and show that the Hyades stream stars in these data are again characteristic of having been scattered at a Lindblad resonance. Unfortunately, the analysis of such local samples can determine neither whether it is an inner or an outer Lindblad resonance, nor the multiplicity of the pattern.

Original languageEnglish (US)
Pages (from-to)2459-2466
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
StatePublished - Dec 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Galaxies: spiral
  • Galaxy: disc
  • Galaxy: kinematics and dynamics
  • Galaxy: structure
  • Solar neighbourhood
  • Stars: distances

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