MERLIN observations of the Wolf–Rayet star AS431 (WR147)-a double radio source
Moran, J.P.; Davis, R.J.; Bode, M.F.; Taylor, A.R.; Spencer, R.E.; Argue, A.N.; Irwin, M.J.; Shanklin, Jonathan D.. 1989 MERLIN observations of the Wolf–Rayet star AS431 (WR147)-a double radio source. Nature, 340 (6233). 449-450. 10.1038/340449a0
Full text not available from this repository. (Request a copy)Abstract/Summary
New interferometric observations of the Wolf-Rayet star AS431 using the MERLIN network are presented. These observations had a sensitivity sufficient to map the stellar-thermal continuum radio emission with a beam size of 0.1 arcsec. The object is resolved into two radio source separated by 0.6 arcsec, corresponding to a spatial separation of 1100 AU at the assumed distance of 1.9 kpc. The computed brightness for the two sources, about 10,000 K, is typical of optically thick thermal emission from a stellar wind, and suggests that some part of the emission is nonthermal. One of the radio components corresponds to the position of the single source revealed by accurate optical observations. The observed total radio spectrum is simulated with a two-component model for the emission.
Item Type: | Publication - Article |
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Digital Object Identifier (DOI): | 10.1038/340449a0 |
ISSN: | 0028-0836 |
Additional Keywords: | double stars, radio stars, Wolf0Rayet stars, astronomical maps, continuous radiation, interferometry, stellar winds, thermal radiation |
Date made live: | 17 Oct 2018 13:09 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/521270 |
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