Multi-wavelength analysis of the Galactic supernova remnant MSH 11-61A

Abstract

Due to its centrally bright X-ray morphology and limb brightened radio profile, MSH 11-61A (G290.1-0.8) is classified as a mixed morphology supernova remnant (SNR). H$\textsc{i}$ and CO observations determined that the SNR is interacting with molecular clouds found toward the north and southwest regions of the remnant. In this paper we report on the detection of $\gamma$-ray emission coincident with MSH 11-61A, using 70 months of data from the Large Area Telescope on board the \textit{Fermi Gamma-ray Space Telescope}. To investigate the origin of this emission, we perform broadband modelling of its non-thermal emission considering both leptonic and hadronic cases and concluding that the $\gamma$-ray emission is most likely hadronic in nature. Additionally we present our analysis of a 111 ks archival \textit{Suzaku} observation of this remnant. Our investigation shows that the X-ray emission from MSH 11-61A arises from shock-heated ejecta with the bulk of the X-ray emission arising from a recombining plasma, while the emission towards the east arises from an ionising plasma.

12 Pages, 8 figures. Accepted for publication in the Astrophysical Journal

References in corpus (13)

• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• Parameterization of Gamma, e^+/- and Neutrino Spectra Produced by p-p Interaction in Astronomical Environment
• Detection of 107 glitches in 36 southern pulsars
• Mechanism for spectral break in cosmic ray proton spectrum from Supernova remnant W44
• Supernova Remnants Interacting with Molecular Clouds: X-ray and Gamma-ray Signatures
• Discovery of Recombining Plasma in the Supernova Remnant 3C 391
• An XMM-Newton study of the mixed-morphology supernova remnant W28 (G6.4-0.1)
• Progenitors of Recombining Supernova Remnants
• 3-D Model of Broadband Emission from Supernova Remnants Undergoing Non-linear Diffusive Shock Acceleration
• High resolution HI and radio continuum observations of the SNR G290.1-0.8
• Discovery of X-ray Pulsations from the INTEGRAL Source IGR J11014-6103
• Global Distribution of Ionizing and Recombining Plasmas in the Supernova Remnant G290.1$-$0.8
• On the origin of the jet-like radio/X-ray morphology of G290.1-0.8

Cited by in corpus (9)

• Population study of Galactic supernova remnants at very high $\gamma$-ray energies with H.E.S.S.
• A closer view of the IGR J11014-6103 outflows
• Measurement of the core-collapse progenitor mass distribution of the Small Magellanic Cloud
• Discovery of recombining plasma from the faintest GeV SNR HB 21 and a possible scenario of the cosmic ray escaping from SNR shocks
• An XMM-Newton X-ray View of Supernova Remnant W49B: Revisiting its Recombining Plasmas and Progenitor Type
• The Age Evolution of the Radio Morphology of Supernova Remnants
• An XMM-Newton Study of the Mixed-Morphology Supernova Remnant G346.6-0.2
• Spatially-Resolved Study of Recombining Plasma in W49B Using XMM-Newton
• Supernova remnant G46.8-0.3, a new case of interaction with molecular material