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Mass segregation in the young open cluster NGC 2547

Littlefair, S P, Naylor, T, Jeffries, R D, Devey, C R, Vine, S G

Abstract

We present a study of mass segregation of the young (20-35 Myr isochronal age), open cluster NGC 2547. We find good evidence that mass segregation exists in NGC 2547 down to 3 Msun, and weak evidence for mass segregation down to 1 Msun. Theoretical models of an initially unsegregated model of NGC 2547 using the NBODY2 code show weaker mass segregation, implying that at least some of the observed mass segregation has a primordial origin. We also report the discovery of three possible escaped cluster members, which share the proper motion and colours of the cluster, but lie nearly a degree from the cluster centre.

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Key concepts: Physics, Cluster (spacecraft), Open cluster, Astrophysics, Mass segregation, Stars, Programming language, Computer science