The coupling of a young stellar disc with the molecular torus in the Galactic Centre

0359217 - ASÚ 2012 RIV GB eng J - Journal Article
Haas, J. - Šubr, Ladislav - Kroupa, P.
The coupling of a young stellar disc with the molecular torus in the Galactic Centre.
Monthly Notices of the Royal Astronomical Society. Roč. 412, č. 3 (2011), s. 1905-1912. ISSN 0035-8711. E-ISSN 1365-2966
R&D Projects: GA ČR GD205/09/H033; GA ČR GA202/09/0772
Institutional research plan: CEZ:AV0Z10030501
Keywords : galactic centre * black holes
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 4.900, year: 2011

In this paper, we investigate, by means of numerical N-body computations, the orbital evolution of the stellar disc, which we consider to be initially thin. We include the gravitational influence of both the torus and the late-type stars, as well as the self-gravity of the disc. Our results show that, for a significant set of system parameters, the evolution of the disc leads, within the lifetime of the early-type stars, to a configuration compatible with the observations. In particular, the disc naturally reaches a specific – perpendicular – orientation with respect to the torus, which is indeed the configuration observed in the Galactic Centre. We, therefore, suggest that all the early-type stars may have been born within a single gaseous disc.
Permanent Link: http://hdl.handle.net/11104/0197046