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FERMILARGE AREA TELESCOPE OBSERVATION OF SUPERNOVA REMNANT S147

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type , Journal 05 Jun 2012Embargo end date: 01 Jan 2012 France, United States, United States Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 752, page 135 (issn: 0004-637X, eissn: 1538-4357,

Authors: J. Katsuta; J. Lande; Hiroyasu Tajima; Hiroyasu Tajima; Marianne Lemoine-Goumard; Y. Hanabata; Tadayuki Takahashi; +5 Authors

doi: 10.1088/0004-637x/752/2/135 , 10.48550/arxiv.1204.4703

arXiv: http://arxiv.org/abs/1204.4703 , 1204.4703

FERMILARGE AREA TELESCOPE OBSERVATION OF SUPERNOVA REMNANT S147

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Abstract

We present an analysis of gamma-ray data obtained with the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the region around SNR S147 (G180.0-1.7). A spatially extended gamma-ray source detected in an energy range of 0.2--10 GeV is found to coincide with SNR S147. We confirm its spatial extension at >5sigma confidence level. The gamma-ray flux is (3.8 \pm 0.6) x 10^{-8} photons cm^{-2} s^{-1}, corresponding to a luminosity of 1.3 x 10^{34} (d/1.3 kpc)^2 erg s^{-1} in this energy range. The gamma-ray emission exhibits a possible spatial correlation with prominent Halpha filaments of S147. There is no indication that the gamma-ray emission comes from the associated pulsar PSR J0538+2817. The gamma-ray spectrum integrated over the remnant is likely dominated by the decay of neutral pi mesons produced through the proton--proton collisions in the filaments. Reacceleration of pre-existing CRs and subsequent adiabatic compression in the filaments is sufficient to provide the required energy density of high-energy protons.

12 pages, accepted for publication in ApJ

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France, United States, United States

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Keywords

General Physics, individual objects (S147) [ISM], [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Supernova Remnants, ISM: individual objects (S147), [SDU.ASTR.HE] Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], FOS: Physical sciences, [PHYS.ASTR.HE] Physics/Astrophysics/High Energy Astrophysical Phenomena, Energy Range, 72 Physics Of Elementary Particles And Fields, Luminosity, [SDU.ASTR.HE] Sciences of the Universe/Astrophysics/High Energy Astrophysical Phenomena, Astrophysics,Astro, Pulsars, acceleration of particles, High Energy Astrophysical Phenomena (astro-ph.HE), Photons, Mesons, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Compression, Decay, Telescopes Astrophysics,Astro, radiation mechanisms: non-thermal, non-thermal [radiation mechanisms], 520, acceleration of particles - ISM: individual objects (S147) - radiation mechanisms: non-thermal, 71 Classical And Quantum Mechanics, Energy Density, Protons, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR.HE] Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]

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