Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 660855.0, MPI für Astronomie / Publikationen_mpia
Instantaneous starburst of the massive clusters Westerlund 1 and NGC 3603 YC
Authors:Kudryavtseva, N.; Brandner, W.; Gennaro, M.; Rochau, B.; Stolte, A.; Andersen, M.; Da Rio, N.; Henning, T.; Tognelli, E.; Hogg, D.; Clark, S.; Waters, R.
Date of Publication (YYYY-MM-DD):2012
Journal Abbrev.:The Astrophysical Journal Letters
Volume:750
Issue / Number:2
Start Page:id. L44
Audience:Not Specified
Abstract / Description:We present a new method to determine the age spread of resolved stellar populations in a starburst cluster. The method relies on a two-step process. In the first step, kinematic members of the cluster are identified based on multi-epoch astrometric monitoring. In the second step, a Bayesian analysis is carried out, comparing the observed photometric sequence of cluster members with sets of theoretical isochrones. When applying this methodology to optical and near-infrared high angular resolution Hubble Space Telescope (HST) and adaptive optics observations of the ~5 Myr old starburst cluster Westerlund 1 and ~2 Myr old starburst cluster NGC 3603 YC, we derive upper limits for the age spreads of 0.4 and 0.1 Myr, respectively. The results strongly suggest that star formation in these starburst clusters happened almost instantaneously.
Free Keywords:Hertzsprung-Russell and C-M diagrams; open clusters and associations: individual: Westerlund 1 NGC 3603 YC; stars: evolution; stars: formation
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2012ApJ...750L..44K
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.