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A Population of Gamma-Ray Millisecond Pulsars Seen with the Fermi Large Area Telescope
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2009 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 325, no 5942, 848-852 p.Article in journal (Refereed) Published
Abstract [en]

Pulsars are born with subsecond spin periods and slow by electromagnetic braking for several tens of millions of years, when detectable radiation ceases. A second life can occur for neutron stars in binary systems. They can acquire mass and angular momentum from their companions, to be spun up to millisecond periods and begin radiating again. We searched Fermi Large Area Telescope data for pulsations from all known millisecond pulsars (MSPs) outside of globular clusters, using rotation parameters from radio telescopes. Strong gamma-ray pulsations were detected for eight MSPs. The gamma-ray pulse profiles and spectral properties resemble those of young gamma-ray pulsars. The basic emission mechanism seems to be the same for MSPs and young pulsars, with the emission originating in regions far from the neutron star surface.

Place, publisher, year, edition, pages
2009. Vol. 325, no 5942, 848-852 p.
Keyword [en]
space-telescope, radio pulsars, emission, discovery
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-18707DOI: 10.1126/science.1176113ISI: 000269242400039Scopus ID: 2-s2.0-68949213844OAI: oai:DiVA.org:kth-18707DiVA: diva2:336754
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QC 20100525

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Axelsson, M.Ryde, Felix

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