The Discovery of an Embedded Cluster of High-Mass Stars Near SGR 1900+14

Details The Discovery of an Embedded Cluster of High-Mass Stars Near SGR 1900+14 The Discovery of an Embedded Cluster of High-Mass Stars Near SGR 1900+14

2000-02-29

arxiv.org/abs/astro-ph/0002530v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, accepted Astrophysical Journal Letters

Scientific paper

10.1086/312602

Deep I-band imaging to approximately I = 26.5 of the soft gamma-ray repeater SGR 1900+14 region has revealed a compact cluster of massive stars located only a few arcseconds from the fading radio source thought to be the location of the SGR (Frail, Kulkarni, & Bloom 1999). This cluster was previously hidden in the glare of the pair of M5 supergiant stars (whose light was removed by PSF subtraction) proposed by Vrba et al. (1996) as likely associated with the SGR 1900+14. The cluster has at least 13 members within a cluster radius of approximately 0.6 pc, based on an estimated distance of 12-15 kpc. It is remarkably similar to a cluster found associated with SGR 1806-20 (Fuchs et al. 1999). That similar clusters have now been found at or near the positions of the two best-studied SGRs suggests that young neutron stars, thought to be responsible for the SGR phenomenon, have their origins in proximate compact clusters of massive stars.

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