Volume 445, Number 1, January I 2006
|Page(s)||305 - 312|
|Section||Stellar structure and evolution|
|Published online||13 December 2005|
High-energy emission of fast rotating white dwarfs
Korea Astronomy and Space Science Institute, 61-1 Whaam-dong, Yusong-gu, Taejon 305-348, Republic of Korea e-mail: email@example.com
2 Central Astronomical Observatory of the Russian Academy of Sciences, Pulkovo 65/1, 196140 St. Petersburg, Russia
3 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
4 Department of Physics and Astronomy, University of Bonn, Germany
Accepted: 29 August 2005
The process of energy release in the magnetosphere of a fast rotating, magnetized white dwarf can be explained in terms of the canonical spin-powered pulsar model. Applying this model to the white dwarf companion of the low mass close binary AE Aquarii leads us to the following conclusions. The system acts as an accelerator of charged particles whose energy is limited to TeV and which are ejected from the magnetosphere of the primary with the rate . Due to the curvature radiation of the accelerated primary electrons the system should appear as a source of soft γ-rays (∼100 keV) with the luminosity <. The TeV emission of the system is dominated by the inverse Compton scattering of optical photons on the ultrarelativistic electrons. The optical photons are mainly contributed by the normal companion and the stream of material flowing through the magnetosphere of the white dwarf. The luminosity of the TeV source depends on the state of the system (flaring/quiet) and is limited to <. These results allow us to understand a lack of success in searching for the high-energy emission of AE Aqr with the Compton Gamma-ray Observatory and the Whipple Observatory.
Key words: acceleration of particles / gamma rays: theory / stars: pulsars: general / stars: binaries: close / stars: white dwarfs / stars: individual: AE Aquarii
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.