Infrared Imaging and Spectroscopy of the Massive Star Cluster near LBV 1806-20

Details Infrared Imaging and Spectroscopy of the Massive Star Cluster near LBV 1806-20 Infrared Imaging and Spectroscopy of the Massive Star Cluster near LBV 1806-20

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002noao.prop...82e&link_type=abstract

NOAO Proposal ID #2002A-0082

Physics

Scientific paper

The stellar cluster near the luminous star LBV 1806-20 is one of the most unusual clusters in the Galaxy. Our 2001 CTIO observations showed that LBV 1806-20 itself may be the most luminous single star in the Galaxy, with L > 6 × 10^6 L_&sun;. In addition, we found that the inner cluster also contains at least one Wolf-Rayet star of the WCL subclass, two blue hypergiants (luminosity class Ia+), and the soft gamma-ray repeater SGR 1806-20, all in a volume < 2 pc in diameter. We propose to use OSIRIS on the CTIO 4-meter to perform deep imaging of the cluster and spectroscopy of 14 potential cluster members, in addition to the 4 luminous stars noted above. These observations will help us determine the physical extent of the cluster, the number of high-mass stars it contains, and the nature of its most luminous members.

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