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Issue A&A
Volume 454, Number 3, August II 2006
Page(s) 811 - 814
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20064905



A&A 454, 811-814 (2006)
DOI: 10.1051/0004-6361:20064905

The fate of discs around massive stars in young clusters

S. Pfalzner, C. Olczak and A. Eckart

I. Physikalisches Institut, University of Cologne, Germany
    e-mail: pfalzner@ph1.uni-koeln.de

(Received 24 January 2006 / Accepted 10 April 2006 )

Abstract
Aims.To understand whether there is a difference in the dispersion of discs around stars in high-density young stellar clusters like the Orion Nebula Cluster (ONC) according to the mass of the star.
Methods.Two types of simulations were combined - N-body simulations of the dynamics of the stars in the ONC and mass loss results from simulations of star-disc encounters, where the disc mass loss of all stars is determined as a function of time.
Results.We find that in the Trapezium, the discs around high-mass stars are dispersed much more quickly and to a larger degree by their gravitational interaction than for intermediate-mass stars. This is consistent with recent observations of IC 348, where a higher disc frequency was found around solar mass stars than for more massive stars, suggesting that this might be a general trend in large young stellar clusters.


Key words: stars: circumstellar matter -- stars: planetary systems: protoplanetary disks -- galaxies: star clusters



© ESO 2006


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