Escaping stars from young low-N clusters

Details Escaping stars from young low-N clusters Escaping stars from young low-N clusters

2010-08-26

arxiv.org/abs/1008.4578v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

10 pages, 10 figures, accepted for publication by MNRAS

Scientific paper

With the use of N-body calculations the amount and properties of escaping stars from low-N (N = 100 and 1000) young embedded star clusters prior to gas expulsion are studied over the first 5 Myr of their existence. Besides the number of stars also different initial radii and binary populations are examined as well as virialised and collapsing clusters. It is found that these clusters can loose substantial amounts (up to 20%) of stars within 5 Myr with considerable velocities up to more than 100 km/s. Even with their mean velocities between 2 and 8 km/s these stars will still be travelling between 2 and 30 pc during the 5 Myr. Therefore can large amounts of distributed stars in star-forming regions not necessarily be counted as evidence for the isolated formation of stars.

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