White dwarf pulsars as possible electron-positron factories

Kazumi Kashiyama, Kunihito Ioka, Norita Kawanaka

Research output: Contribution to conferencePaperpeer-review


We suggest that white dwarf pulsars can compete with neutron star pulsars for producing the excesses of cosmic ray positrons and electrons (e ± ) observed by the PAMELA, ATIC/PPB-BETS, Fermi and H.E.S.S. experiments. A double degen- erate white dwarf binary mergers into a white dwarf pulsar with rotational energy (∼ 1050erg) comparable to a neutron star pulsar. The birth rate (∼ 1=100yr) is also similar, providing the right energy budget. Applying the neutron star theory, we show that the white dwarf pulsars can produce e ± , up to ∼ 10TeV for high magnetic fields (> 108G). In contrast to the neutron star case, the adiabatic energy losses of e ± are negligible since their injection continues after the nebula expansion. The long activity also enhances the nearby sources, potentially dominating the quickly cooled e ± above TeV energy, detectable by the future AMS-02, CALET and CTA experiment.

Original languageEnglish
Number of pages3
Publication statusPublished - 2010
Externally publishedYes
Event20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 - Kyoto, Japan
Duration: 2010 Sept 212010 Sept 25


Other20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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