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The VLT-FLAMES Tarantula Survey VI: Evidence for rotation of the young massive cluster R136

Hénault-Brunet, V, Gieles, M, Evans, CJ, Sana, H, Bastian, N, Apellániz, JM, Taylor, WD, Markova, N, Bressert, E, Koter, AD and Loon, JTV (2012) The VLT-FLAMES Tarantula Survey VI: Evidence for rotation of the young massive cluster R136 Astronomy and Astrophysics.

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Although it has important ramifications for both the formation of star clusters and their subsequent dynamical evolution, rotation remains a largely unexplored characteristic of young star clusters (few Myr). Using multi-epoch spectroscopic data of the inner regions of 30 Doradus in the Large Magellanic Cloud (LMC) obtained as part of the VLT-FLAMES Tarantula Survey, we search for rotation of the young massive cluster R136. From the radial velocities of 36 apparently single O-type stars within a projected radius of 10 pc from the centre of the cluster, we find evidence, at the 95% confidence level, for rotation of the cluster as a whole. We use a maximum likelihood method to fit simple rotation curves to our data and find a typical rotational velocity of ~3 km/s. When compared to the low velocity dispersion of R136, our result suggests that star clusters may form with at least ~20% of the kinetic energy in rotation.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Hénault-Brunet, V
Evans, CJ
Sana, H
Bastian, N
Apellániz, JM
Taylor, WD
Markova, N
Bressert, E
Koter, AD
Loon, JTV
Date : 30 July 2012
DOI : 10.1051/0004-6361/201219472
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:40
Last Modified : 24 Jan 2020 22:39

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