Fermi Large Area Telescope Detection of Supernova Remnant RCW 86

Abstract

Using $5.4$ year Fermi-LAT data, we report the detection of GeV $\gamma$-ray emission from the shell-type supernova remnant RCW 86 (G315.4-2.3) with a significance of $\sim 5.1\sigma$. The data slightly favors an extended emission of this supernova remnant. The spectral index of RCW 86 is found to be very hard, $\Gamma \sim 1.4$, in the $0.4$ to $300$ GeV range. A one zone leptonic model can well fit the multi-wavelength data from radio to very high energy $\gamma$-rays. The very hard GeV $\gamma$-ray spectrum and the inferred low gas density seem to disfavor the hadronic origin of the $\gamma$-rays. The $\gamma$-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.

5 pages, 3 figures and 2 tables. Match the published version in ApJL

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Cited by in corpus (26)

• Space- and Ground-Based Gamma-Ray Astrophysics
• Study of TeV shell supernova remnants at gamma-ray energies
• Detection of two TeV shell-type remnants at GeV energies with Fermi-LAT: HESS J1731-347 and SN 1006
• Deep morphological and spectral study of the SNR RCW 86 with Fermi-LAT
• Detailed spectral and morphological analysis of the shell type SNR RCW 86
• Fermi LAT Observation of Supernova Remnant HB9
• The Refined Shock Velocity of the X-Ray Filaments in the RCW 86 Northeast Rim
• GeV γ-ray Emission Detected by Fermi-LAT Probably Associated with the Thermal Composite Supernova Remnant Kesteven 41 in a Molecular Environment
• Detection of GeV $\gamma$-ray emission in the direction of HESS J1731-347 with Fermi-LAT
• HESS J1640-465 -- a Gamma-ray emitting pulsar wind nebula ?
• Discovery of X-ray Emission from the Galactic Supernova Remnant G32.8-0.1 with Suzaku
• A GeV source in the direction of Supernova Remnant CTB 37B
• Expectation on Observation of Supernova Remnants with the LHAASO Project
• Observational constraints on the maximum energies of accelerated particles in supernova remnants: low maximum energies and a large variety
• Electron Acceleration in Middle-age Shell-type $\gamma$-Ray Supernova Remnants
• Study on the escape timescale of high-energy particles from supernova remnants through thermal X-ray properties
• HESS J1427-608: an unusual hard unbroken $\gamma -$ray spectrum in a very wide energy range
• Particle acceleration controlled by ambient density in the southwestern rim of RCW 86
• Search for Galactic Civilizations Using Historical Supernovae
• Is the SNR HESS J1731-347 colliding with molecular clouds?
• The structure of TeV-bright shell-type supernova remnants
• Modeling the multiwavelength emission from G73.9+0.9: Gamma-rays from a SNR-MC interaction
• Using optical lines to study particle acceleration at supernova remnants
• Detection of the extended $\gamma$-ray emission from the high Galactic latitude Calvera's SNR candidate
• Prospects for PWNe and SNRs science with the ASTRI mini-array of pre-production small-sized telescopes of the Cherenkov Telescope Array
• A new wideband radio polarization observation of the Supernova Remnant G315.4$-$2.3