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DISCOVERY OF PULSED...
DISCOVERY OF PULSED gamma-RAYS FROM PSR J0034-0534 WITH THE FERMI LARGE AREA TELESCOPE : A CASE FOR CO-LOCATED RADIO AND gamma-RAY EMISSION REGIONS
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Abdo, A. A. (författare)
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Ackermann, M. (författare)
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Ajello, M. (författare)
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Allafort, A. (författare)
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- McGlynn, Sinéad (författare)
- KTH,Partikel- och astropartikelfysik
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- Ryde, Felix (författare)
- KTH,Partikel- och astropartikelfysik
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- Ylinen, Tomi (författare)
- KTH,Partikel- och astropartikelfysik
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(creator_code:org_t)
- 2010-03-09
- 2010
- Engelska.
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 712:2, s. 957-963
- Relaterad länk:
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http://arxiv.org/pdf...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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 13 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 +/- 0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The >= 0.1 GeV spectrum of this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8 +/- 0.6 +/- 0.1 GeV and a photon index of 1.5 +/- 0.2 +/- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- gamma rays: general
- pulsars: general
- pulsars: individual (PSR
- J0034-0534)
- millisecond pulsars
- light curves
- giant pulses
- crab pulsar
- slot
- gaps
- radiation
- geometry
- search
- Astronomy and astrophysics
- Astronomi och astrofysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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