2013/07/30 by A. Chiotellis, D. I. Kosenko, D. Kosenko +4 · 4 citations
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Bubble #Context (archaeology) #Deflagration #Detonation #Explosive material #Galaxy #Gamma-ray bursts and supernovae #Interstellar medium #Mechanics #Physics #Plasma #Pulsars and Gravitational Waves Research #Stars #Supernova #Supernova remnant #Thermonuclear fusion #White dwarf #astro-ph.HE
paper · pdf · doi:10.1093/mnras/stt1406
12 pages, 7 figures, accepted for publication in MNRAS
arxiv created 2013/07/30 · openalex publication_date 2013/09/02 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The well-established Type Ia remnant of Tycho's supernova (SN 1572) reveals discrepant ambient medium-density estimates based on either the measured dynamics or the X-ray emission properties. This discrepancy can potentially be solved by assuming that the supernova remnant (SNR) shock initially moved through a stellar wind bubble, but is currently evolving in the uniform interstellar medium with a relatively low density. We investigate this scenario by combining hydrodynamical simulations of the wind-loss phase and the SNR evolution with a coupled X-ray emission model, which includes non-equilibrium ionization. For the explosion models we use the well-known W7 deflagration model and the delayed detonation model that was previously shown to provide good fits to the X-ray emission of Tycho's SNR. Our simulations confirm that a uniform ambient density cannot simultaneously reproduce the dynamical and X-ray emission properties of Tycho. In contrast, models that considered that the remnant was evolving in a dense, but small, wind bubble reproduce reasonably well both the measured X-ray emission spectrum and the expansion parameter of Tycho's SNR. Finally, we discuss possible mass-loss scenarios in the context of single- and double-degenerate models which possibly could form such a small dense wind bubble.