The Library
Roche tomography of cataclysmic variables – VII. The long-term magnetic activity of AE Aqr
Tools
Tools
Tools
Hill, C. A., Watson, C. A., Steeghs, D., Dhillon, V. S. and Shahbaz, T. (2016) Roche tomography of cataclysmic variables – VII. The long-term magnetic activity of AE Aqr. Monthly Notices of the Royal Astronomical Society, 459 (2). pp. 1858-1874. doi:10.1093/mnras/stw766
Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1093/mnras/stw766
Abstract
We present a long-term study of the secondary star in the cataclysmic variable AE Aqr, using Roche tomography to indirectly image starspots on the stellar surface spanning 8 years of observations. The seven maps show an abundance of spot features at both high and low latitudes. We find that all maps have at least one large high-latitude spot region, and we discuss its complex evolution between maps, as well as its compatibility with current dynamo theories. Furthermore, we see the apparent growth in fractional spot coverage, fs, around 45° latitude over the duration of observations, with a persistently high fs near latitudes of 20°. These bands of spots may form as part of a magnetic activity cycle, with magnetic flux tubes emerging at different latitudes, similar to the ‘butterfly’ diagram for the Sun. We discuss the nature of flux tube emergence in close binaries, as well as the activity of AE Aqr in the context of other stars.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Physics | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
| Publisher: | Oxford University Press | ||||||||
| ISSN: | 0035-8711 | ||||||||
| Official Date: | 5 April 2016 | ||||||||
| Dates: |
|
||||||||
| Volume: | 459 | ||||||||
| Number: | 2 | ||||||||
| Page Range: | pp. 1858-1874 | ||||||||
| DOI: | 10.1093/mnras/stw766 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
