The Fate of Discs around Massive Stars in Young Clusters

Details The Fate of Discs around Massive Stars in Young Clusters The Fate of Discs around Massive Stars in Young Clusters

2006-04-04

arxiv.org/abs/astro-ph/0604018v1

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, accepted by A&A

Scientific paper

10.1051/0004-6361:20064905

AIMS: The aim of this work is 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 the very 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.

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