Velocity-space substructure from nearby RAVE and SDSS stars

Дата и время публикации : 2011-02-22T21:19:11Z

Авторы публикации и институты :
Chang Hoon Hahn (Rutgers University)
J. A. Sellwood (Rutgers University)
Carlton Pryor (Rutgers University)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: Included copy editor’s corrections. Accepted to appear in MNRAS. 9 pages, 11 figures, uses mn2e LaTeX
Первичная категория: astro-ph.GA

Все категории : astro-ph.GA, astro-ph.CO

Краткий обзор статьи: 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.

Category: Physics