Velocity-space substructure from nearby RAVE and SDSS stars

Autor:	Hahn, Chang Hoon, Sellwood, J. A., Pryor, Carlton
Rok vydání:	2011
Předmět:	Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1111/j.1365-2966.2011.19633.x
Popis:	We extract a sample of disc stars within 200 pc 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, analysis of such local samples can determine neither whether it is an inner or an outer Lindblad resonance, nor the multiplicity of the pattern. Comment: Included copy editor's corrections. Accepted to appear in MNRAS. 9 pages, 11 figures, uses mn2e LaTeX
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1102.4626 Zobrazit plný text záznamu View this record from Arxiv