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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 742710.0, MPI für Astronomie / Publikationen_mpia
Hierarchical formation of Westerlund 1: a collapsing cluster with no primordial mass segregation?
Authors:Gennaro, M.; Goodwin, S. P.; Parker, R. J.; Allison, R. J.; Brandner, W.
Date of Publication (YYYY-MM-DD):2017
Title of Journal:Monthly Notices of the Royal Astronomical Society
Volume:472
Issue / Number:2
Start Page:1760
End Page:1769
Audience:Not Specified
Abstract / Description:We examine the level of substructure and mass segregation in the massive, young cluster Westerlund 1. We find that it is relatively smooth, with little or no mass segregation, but with the massive stars in regions of significantly higher than average surface density. While an expanding or bouncing-back scenario for the evolution of Westerlund 1 cannot be ruled out, we argue that the most natural model to explain these observations is one in which Westerlund 1 formed with no primordial mass segregation and at a similar or larger size than we now observe.
Free Keywords:stars: kinematics and dynamics; open clusters and associations: individual: Westerlund 1
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0035-8711
URL:http://adsabs.harvard.edu/abs/2017MNRAS.472.1760G
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