Global Distribution of Ionizing and Recombining Plasmas in the Supernova Remnant G290.1$-$0.8

Abstract

We report on the Suzaku results of the mixed-morphology supernova remnant (SNR) G290.1$-$0.8 (MSH 11-61A). The SNR has an asymmetric structure extended to the southeast and the northwest. In the X-ray spectra of the center and the northwest regions, we discover recombining plasma features with the strong Si Ly$\alpha$ and radiative recombination continuum at $\sim$ 2.7 keV. These features are the most significant in the northwest region, and the spectra are well-reproduced with a recombining plasma of $k{T}_{\mathrm{e}}=0.5$ keV. Whereas the spectra of other regions are expressed by an ionizing plasma of $k{T}_{\mathrm{e}}=0.6$ keV. The recombining plasma has over-solar abundances, while the ionizing plasma has roughly solar abundances. Hence they are likely ejecta and interstellar medium (ISM) origin, respectively. The recombining plasma in the northwest of G290.1$-$0.8 would be generated by a break-out of the supernova ejecta from a high density circumstellar medium to a low density ISM.

15 pages, 3 figures, and 3 tables, accepted for publication in PASJ

References in corpus (2)

• The long helical jet of the Lighthouse nebula, IGR J11014-6103
• Discovery of X-ray Pulsations from the INTEGRAL Source IGR J11014-6103

Cited by in corpus (14)

• The gas-to-extinction ratio and the gas distribution in the Galaxy
• A closer view of the IGR J11014-6103 outflows
• Progenitor Mass Distribution of Core-Collapse Supernova Remnants in Our Galaxy and Magellanic Clouds based on Elemental Abundances
• ALMA CO Observations of the Mixed-Morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma-rays via Shock-Cloud Interactions
• A Complete Catalogue of Dusty Supernova Remnants
• N49: the first robust discovery of a recombining plasma in an extra galactic supernova remnant
• Spatially Resolved Chandra Spectroscopy of the Large Magellanic Cloud Supernova Remnant N132D
• Uniform distribution of the extremely overionized plasma associated with the supernova remnant G359.1-0.5
• 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
• Suzaku study on the Ejecta of the Supernova Remnant G272.2$-$3.2
• Multi-wavelength analysis of the Galactic supernova remnant MSH 11-61A
• X-ray counterpart detection and gamma-ray analysis of the SNR G279.0+01.1 with eROSITA and Fermi-LAT
• On the formation of over-ionized plasma in evolved supernova remnants