Thumbnail
Access Restriction
Open

Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2010-02-12
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics
Subject Keyword Astrophysics - High Energy Astrophysical Phenomena ♦ Astrophysics - Astrophysics of Galaxies ♦ physics:astro-ph
Abstract Millisecond pulsars (MSPs) have been firmly established as a class of gamma-ray emitters via the detection of pulsations above 0.1 GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using thirteen months of LAT data significant gamma-ray pulsations at the radio period have been detected from the MSP PSR J0034-0534, making it the ninth clear MSP detection by the LAT. The gamma-ray light curve shows two peaks separated by 0.274$\pm$0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The $\geq$0.1 GeV spectrum of this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8$\pm 0.6\pm$0.1 GeV and a photon index of 1.5$\pm 0.2\pm$0.1, first errors are statistical and second are systematic. The near-alignment of the radio and gamma-ray peaks strongly suggests that the radio and gamma-ray emission regions are co-located and both are the result of caustic formation.
Description Comment: 20 pages, 3 figures, 2 tables. Accepted for publication in ApJ
Reference: Astrophysical Journal 712 (2010) 957-963
Educational Use Research
Learning Resource Type Article
Organization The Fermi LAT Collaboration ♦ Pulsar timing consortium
Page Count 20


Open content in new tab

   Open content in new tab