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- W2120284927 endingPage "96" @default.
- W2120284927 startingPage "96" @default.
- W2120284927 abstract "We report results from a multi-wavelength analysis of the Galactic SNR RCW 86, the proposed remnant of the supernova of 185 A.D. We report new infrared observations from {it Spitzer} and {it WISE}, where the entire shell is detected at 24 and 22 $mu$m. We fit the infrared flux ratios with models of collisionally heated ambient dust, finding post-shock gas densities in the non-radiative shocks of 2.4 and 2.0 cm$^{-3}$ in the SW and NW portions of the remnant, respectively. The Balmer-dominated shocks around the periphery of the shell, large amount of iron in the X-ray emitting ejecta, and lack of a compact remnant support a Type Ia origin for this remnant. From hydrodynamic simulations, the observed characteristics of RCW 86 are successfully reproduced by an off-center explosion in a low-density cavity carved by the progenitor system. This would make RCW 86 the first known case of a Type Ia supernova in a wind-blown bubble. The fast shocks ($> 3000$ km s$^{-1}$) observed in the NE are propagating in the low-density bubble, where the shock is just beginning to encounter the shell, while the slower shocks elsewhere have already encountered the bubble wall. The diffuse nature of the synchrotron emission in the SW and NW is due to electrons that were accelerated early in the lifetime of the remnant, when the shock was still in the bubble. Electrons in a bubble could produce gamma-rays by inverse-Compton scattering. The wind-blown bubble scenario requires a single-degenerate progenitor, which should leave behind a companion star." @default.
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- W2120284927 date "2011-10-21" @default.
- W2120284927 modified "2023-10-16" @default.
- W2120284927 title "RCW 86: A TYPE Ia SUPERNOVA IN A WIND-BLOWN BUBBLE" @default.
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- W2120284927 doi "https://doi.org/10.1088/0004-637x/741/2/96" @default.
- W2120284927 hasPublicationYear "2011" @default.
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