Show simple item record

dc.contributor.authorBüsching, I.
dc.contributor.authorVenter, C.
dc.contributor.authorDe Jager, O.C.
dc.identifier.citationBüsching, I. et al. 2008. Contributions from nearby pulsars to the local cosmic ray electron spectrum. Advances in space research, 42(3):497-503. []en
dc.description.abstractPSR J0437-4715 is one of the closest millisecond pulsars (MSPs) to Earth, lying at a distance of ∼140 pc. This pulsar has a characteristic age of 4.9 Gyr and a relatively low spindown power of ∼1034 ergs/s. During its rather long lifetime, a large fraction of the energy output has been in the form of multi-TeV electrons. In this paper, we investigate the possible contribution of this nearby MSP to the local interstellar electron spectrum (LIS). The old age of the system justifies a steady-state evaluation of the contribution from this pulsar to the LIS. We calculate the electron spectrum at the light cylinder in the framework of a General Relativistic polar cap (PC) model, and use this as an injection spectrum in a diffusion model. The younger Geminga pulsar is also very close to Earth and warrants investigation. A steady-state approach is however no longer justified, so we use an impulsive injection model. We will present results of a study of the contribution from these pulsars to the cosmic ray (CR) LIS. Our calculations show that pulsars like Geminga can make a non-negligible contribution to the LIS
dc.subjectMillisecond pulsar
dc.subjectCosmic ray electrons
dc.subjectPSR J0437-4715
dc.subjectLocal interstellar spectrum
dc.titleContributions from nearby pulsars to the local cosmic ray electron spectrumen
dc.contributor.researchID13235176 - Büsching, Ingo
dc.contributor.researchID10065857 - De Jager, Ocker Cornelis
dc.contributor.researchID12006653 - Venter, Christo

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record