Other
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.296..669s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 296, Issue 3, pp. 669-688.
Other
25
Circumstellar Matter, Stars: Individual: P Cyg, Stars: Mass-Loss, Stars: Variables: Other, Radio Continuum: Stars
Scientific paper
We present a large set of radio observations of the luminous blue variable P Cygni. These include two 6-cm images obtained with MERLIN which spatially resolve the 6-cm photosphere, monitoring observations obtained at Jodrell Bank every few days over a period of two months, and VLA observations obtained every month for seven years. This combination of data shows that the circumstellar environment of P Cyg is highly inhomogeneous, that there is a radio nebula extending to almost an arcminute from the star at 2 and 6cm, and that the radio emission is variable on a time-scale no longer than one month, and probably as short as a few days. This short-time-scale variability is difficult to explain. We present a model for the radio emission with which we demonstrate that the star has probably been losing mass at a significant rate for at least a few thousand years, and that it has undergone at least two major outbursts of increased mass loss during the past two millenia.
Barlow Michael J.
Becker Robert H.
Davis Raymond Jr.
Exter Katrina M.
Skinner Christopher J.
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