Modelling the interaction of thermonuclear supernova remnants with circumstellar structures: the case of Tycho's supernova remnant
Abstract
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.- Publication:
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Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 2013
- DOI:
- 10.1093/mnras/stt1406
- arXiv:
- arXiv:1307.8123
- Bibcode:
- 2013MNRAS.435.1659C
- Keywords:
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- hydrodynamics;
- supernovae: individual: SN1572;
- ISM: supernova remnants;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 12 pages, 7 figures, accepted for publication in MNRAS