Kazimierz J. Borkowski et al 2009 ApJ 699 L64 doi:10.1088/0004-637X/699/2/L64
Kazimierz J. Borkowski, John M. Blondin and Stephen P. Reynolds
Show affiliationsProgenitors of Type Ia supernovae (SNe) have been predicted to modify their ambient circumstellar (CSM) and interstellar environments through the action of their powerful winds. While there is X-ray and optical evidence for circumstellar interaction in several remnants of Type Ia SNe, widespread evidence for such interaction in Type Ia SNe themselves has been lacking. We consider prospects for the detection of CSM shells that have been predicted to be common around Type Ia SNe. Such shells are most easily detected in Na I absorption lines. Variable (declining) absorption is expected to occur soon after the explosion, primarily during the SN rise time, for shells located within ~1-10 pc of a SN. The distance of the shell from the SN can be determined by measuring the timescale for line variability.
98.58.Kh Intercloud medium (ICM); hot and highly ionized gas; bubbles
98.62.Nx Jets and bursts; galactic winds and fountains
97.10.Fy Circumstellar shells, clouds, and expanding envelopes; circumstellar masers
Issue 2 (2009 July 10)
Received 2009 May 6, accepted for publication 2009 May 22
Published 2009 June 17
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