Details

Autor(en) / Beteiligte

• Katsuta, J
• Uchiyama, Y
• Tanaka, T
• Tajima, H
• Bechtol, K
• Funk, S
• Lande, J
• Ballet, J
• HANABATA, Y
• LEMOINE-GOUMARD, M
• Takahashi, T

Titel

FERMI LARGE AREA TELESCOPE OBSERVATION OF SUPERNOVA REMNANT S147

Ist Teil von

• The Astrophysical journal, 2012-06, Vol.752 (2), p.1-12

Ort / Verlag

United States

Erscheinungsjahr

2012

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We present an analysis of gamma-ray data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope in the region around supernova remnant (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 >5[sigma] confidence level. The gamma-ray flux is (3.8 + or - 0.6) x 10 super(-8) photons cm super(-2) s super(-1), corresponding to a luminosity of 1.3 x 10 super(34) (d/1.3 kpc) super(2) erg s super(-1) in this energy range. The gamma-ray emission exhibits a possible spatial correlation with the prominent H alpha filaments of SNR 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. The reacceleration of the pre-existing cosmic rays and subsequent adiabatic compression in the filaments is sufficient to provide the energy density required of high-energy protons.