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A Luminous Companion to SGR 1806-20 by van Kerkwijk, M. H.; Kulkarni, S. R.; Matthews, K.; Neugebauer, G. is a scholarly article available to read on EtoBox.

What is A Luminous Companion to SGR 1806-20 about?

We have obtained infrared spectra of the star suggested to be the counterpart of the soft gamma-ray repeater (SGR) 1806-20. We found strong emission lines similar to those seen in the spectra of the rare Luminous Blue Variables and B[e] stars. A He I absorption line is also seen, from which we infer a spectral type O9--B2. This classification, in combination with the minimum distance of $\simgt6$ kpc inferred from its extinction, makes the star one of the most luminous in the Galaxy. We infer that it is a companion to SGR 1806-20, and suggest that the presence of a companion is somehow related to the SGR phenomenon.

Author

van Kerkwijk, M. H.; Kulkarni, S. R.; Matthews, K.; Neugebauer, G.

Published

1995

Language

EN