Query : 2006A&A...445..305I

2006A&A...445..305I - Astronomy and Astrophysics, volume 445, 305-312 (2006/1-1)

High-energy emission of fast rotating white dwarfs.


Abstract (from CDS):

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 Ep≲3TeV and which are ejected from the magnetosphere of the primary with the rate L_ kin_≲1032erg/s. Due to the curvature radiation of the accelerated primary electrons the system should appear as a source of soft γ-rays (∼100keV) with the luminosity <3x1027erg/s. 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 < 5x1029erg/s. 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.

Abstract Copyright:

Journal keyword(s): acceleration of particles - gamma rays: theory - stars: pulsars: general - stars: binaries: close - stars: white dwarfs - stars: individual: AE Aquarii

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5092 0
2 M 1 SNR 05 34 32 +22 00.8           ~ 5978 1
3 V* AE Aqr CV* 20 40 09.1598959176 -00 52 15.055595220   12.46 10.40   10.191 K3-5IV/V 653 0
4 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 612 1

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