The origin and orbit of the old, metal-rich, open cluster NGC 6791. Insights from kinematics

0387362 - ASÚ 2013 RIV FR eng J - Journal Article
Jílková, L. - Carraro, G. - Jungwiert, Bruno - Minchev, I.
The origin and orbit of the old, metal-rich, open cluster NGC 6791. Insights from kinematics.
Astronomy & Astrophysics. Roč. 541, April (2012), A64/1-A64/11. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA MŠMT(CZ) LC06014; GA ČR GD205/08/H005
Institutional research plan: CEZ:AV0Z10030501
Keywords : galaxy * kinematics and dynamics * open clusters and associations
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 5.084, year: 2012

One possible scenario is that the cluster formed close to the Galactic Center and later migrated outward to its current location. In this work we study the cluster’s orbit and investigate the possible migration processes that may have displaced NGC 6791 to its present-day position, under the assumption that it actually formed in the inner disk. We find that a model that incorporates a strong bar and spiral arm perturbations can indeed be responsible for the migration of NGC 6791 from the inner disk (galocentric radii of 3–5 kpc) to its present-day location. Such a model can provide orbital parameters that are close enough to the observed ones. However, the probability of this scenario as it results from our investigations is very low.
Permanent Link: http://hdl.handle.net/11104/0220259