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A luminous companion to SGR 1806-20

van Kerkwijk, M. H. and Kulkarni, S. R. and Matthews, K. and Neugebauer, G. (1995) A luminous companion to SGR 1806-20. Astrophysical Journal, 444 (2). L33-L35. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20160608-202549978

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Abstract

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 greater than or approximately = 6 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/doi/10.1086/187853ADSArticle
https://arxiv.org/abs/astro-ph/9502038arXivDiscussion Paper
ORCID:
AuthorORCID
Kulkarni, S. R.0000-0001-5390-8563
Additional Information:© 1995 American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1995 January 17; accepted 1995 February 9. We thank L. J. Smith and P.A. Crowther for obtaining the UKIRT spectrum for us, T. R. Geballe for useful discussions about the line identifications, and J. F. Bell and M. A. Dopita for obtaining the CCD image of N49. UKIRT is operated by The Observatories, on behalf of the UK Particle Physics and Astronomy Council. M. H. v. K. is supported by a NASA Hubble Fellowship, S. R. K. by grants from the US NSF, NASA, and the Packard Foundation, and infrared astrophysics at Caltech by a grant from the NSF.
Group:Owens Valley Radio Observatory (OVRO), Palomar Observatory
Funders:
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
NASA Hubble FellowshipUNSPECIFIED
NSFUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20160608-202549978
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160608-202549978
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67795
Collection:CaltechAUTHORS
Deposited By: Joy Painter
Deposited On:09 Jun 2016 04:15
Last Modified:03 Oct 2019 10:08

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