2014/03/31 by Qiang Yuan, Xiaoyuan Huang, Siming Liu +1
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Fermi Gamma-ray Space Telescope #Gamma ray #Gamma-ray bursts and supernovae #Near-Earth supernova #Physics #Radio Astronomy Observations and Technology #Spectral index #Spectral line #Supernova #Supernova remnant #astro-ph.HE
paper · pdf · doi:10.1088/2041-8205/785/2/l22
published as Astrophys.J. 785 (2014) L22 · 5 pages, 3 figures and 2 tables. Match the published version in ApJL
openalex publication_date 2014/04/01 · arxiv created 2014/06/17 · arxiv updated 2014/06/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using 5.4 yr Fermi Large Area Telescope data, we report the detection of GeV γ-ray emission from the shell-type supernova remnant RCW 86 (G315.4-2.3) with a significance of ∼5.1σ. The data slightly favors an extended emission of this supernova remnant. The spectral index of RCW 86 is found to be very hard, Γ ∼ 1.4, in the 0.4–300 GeV range. A one-zone leptonic model can well fit the multi-wavelength data from radio to very high energy γ-rays. The very hard GeV γ-ray spectrum and the inferred low gas density seem to disfavor a hadronic origin for the γ-rays. The γ-ray behavior of RCW 86 is very similar to several other TeV shell-type supernova remnants, e.g., RX J1713.7-3946, RX J0852.0-4622, SN 1006, and HESS J1731-347.