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Further variability of the compact radio nebula of P Cygni

Exter, KM; Watson, SK; Barlow, MJ; Davis, RJ; (2002) Further variability of the compact radio nebula of P Cygni. Monthly Notices of the Royal Astronomical Society , 333 (3) pp. 715-720. 10.1046/j.1365-8711.2002.05466.x. Green open access

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Abstract

Skinner et al. presented two high-resolution 6-cm (5 GHz) images of the B-supergiant star P Cygni. These show the observed morphology and flux densities to have changed over the intervening month. Following on from this, we present a series of seven high-resolution 6-cm images (including re-reductions of the two from Skinner et al.). These confirm that radio emission from the inner 400 mas of the wind is inhomogeneous, consisting usually of several separated bright spots, and that the total and peak flux densities and the observed morphology vary over all time-scales sampled. We suggest that recombination in cooling clumps of gas which will decrease the radio emission, followed by the appearance of other ionized clumps, could explain such rapid changes, but detailed models must await further observations.

Type: Article
Title: Further variability of the compact radio nebula of P Cygni
Open access status: An open access version is available from UCL Discovery
DOI: 10.1046/j.1365-8711.2002.05466.x
Publisher version: https://doi.org/10.1046/j.1365-8711.2002.05466.x
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Astronomy & Astrophysics, stars : imaging, stars : individual : P Cygni, supergiants, radio continuum : stars, WOLF-RAYET STARS, MASS-LOSS, SPECTRUM, WIND, EMISSION
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10096028
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