Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
| one publication added to basket [303473] |
A large radio nebula around P Cygni
In: Monthly Notices of the Royal Astronomical Society. OXFORD UNIV PRESS: Oxford. ISSN 0035-8711; e-ISSN 1365-2966, meer
|   |
| Author keywords |
circumstellar matter, stars: individual: P Cyg, stars: mass-loss, stars: variables: other, radio continuum: stars |
| Auteurs | | Top |
- Skinner, C.J.
- Becker, R.H.
- White, R.L.
|
- Exter, K.M., meer
- Barlow, M.J.
- Davis, R.J.
|
|
| Abstract |
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 6 cm, 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. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
