Universität zu Köln

Harfst, S., Portegies Zwart, S. and Stolte, A. (2010). Reconstructing the Arches cluster - I. Constraining the initial conditions. Mon. Not. Roy. Astron. Soc., 409 (2). S. 628 - 639. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We have performed a series of N-body simulations to model the Arches cluster. Our aim is to find the best-fitting model for the Arches cluster by comparing our simulations with observational data and to constrain the parameters for the initial conditions of the cluster. By neglecting the Galactic potential and stellar evolution, we are able to efficiently search through a large parameter space to determine, for example, the initial mass function (IMF), size and mass of the cluster. We find that the cluster's observed present-day mass function can be well explained with an initial Salpeter IMF. The lower mass limit of the IMF cannot be constrained well from our models. In our best models, the initial total mass down to a mass limit of 0.5M(circle dot) is (4.9 +/- 0.8) x 10(4)M(circle dot). The initial virial radius of the cluster is 0.77 +/- 0.12 pc. A concentration parameter of the initial King model W-0 = 3 gives the best results.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Harfst, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Portegies Zwart, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stolte, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-491919
DOI:	10.1111/j.1365-2966.2010.17326.x
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	409
Number:	2
Page Range:	S. 628 - 639
Date:	2010
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COMPACT YOUNG CLUSTERS; MASS FUNCTION; GALACTIC-CENTER; ADAPTIVE OPTICS; STAR-CLUSTERS; STELLAR EVOLUTION; SYSTEMS; REGION Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49191