White dwarf deflagrations for Type Iax supernovae: polarisation signatures from the explosion and companion interaction
White dwarf deflagrations for Type Iax supernovae: polarisation signatures from the explosion and companion interaction
复制标题
Iax 型超新星的白矮星爆燃:爆炸和伴星相互作用的偏振特征
DOI:
10.1051/0004-6361/201937245
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发表时间:
2020-02
期刊:
影响因子:
--
通讯作者:
Seitenzahl I. R.
中科院分区:
文献类型:
--
作者:
Bulla M.;Liu Z. -W.;Roepke F. K.;Sim S. A.;Fink M.;Kromer M.;Pakmor R.;Seitenzahl I. R.
Growing evidence suggests that Type Iax supernovae might be the result of thermonuclear deflagrations of Chandrasekhar-mass white dwarfs in binary systems. We carry out Monte Carlo radiative transfer simulations and predict spectropolarimetric features originating from the supernova explosion and subsequent ejecta interaction with the companion star. Specifically, we calculate viewing-angle dependent flux and polarisation spectra for a 3D model simulating the deflagration of a Chandrasekhar-mass white dwarf and, for a second model, simulating the ejecta interaction with a main-sequence star. We find that the intrinsic signal is weakly polarised and only mildly viewing-angle dependent, owing to the overall spherical symmetry of the explosion and the depolarising contribution of iron-group elements dominating the ejecta composition. The interaction with the companion star carves out a cavity in the ejecta and produces a detectable, but modest signal that is significant only at relatively blue wavelengths (less than or similar to 5000 angstrom). In particular, increasingly fainter and redder spectra are predicted for observer orientations further from the cavity, while a modest polarisation signal P similar to 0.2 per cent is found at blue wavelengths for orientations 30 degrees and 45 degrees away from the cavity. We find a reasonable agreement between the interaction model viewed from these orientations and spectropolarimetric data of SN 2005hk and interpret the maximum-light polarisation signal seen at blue wavelengths for this event as a possible signature of the ejecta-companion interaction. We encourage further polarimetric observations of SNe Iax to test whether our results can be extended and generalised to the whole SN Iax class.
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DOI:
10.1086/522367
发表时间:
2006-02
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Leonard
通讯作者:
D. Leonard
影响因子:
4.8
作者:
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DOI:
10.1088/2041-8205/762/1/l5
发表时间:
2012-10
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
B. Shappee;K. Stanek;R. Pogge;P. Garnavich
通讯作者:
B. Shappee;K. Stanek;R. Pogge;P. Garnavich
影响因子:
3.5
作者:
M. Phillips;Weidong Li;J. Frieman;J. Frieman;Sergei Blinnikov;D. Depoy;J. Prieto;Peter Milne-
通讯作者:
M. Phillips;Weidong Li;J. Frieman;J. Frieman;Sergei Blinnikov;D. Depoy;J. Prieto;Peter Milne-
DOI:
10.3847/1538-4357/ab6323
发表时间:
2019-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
J. Prieto;Ping Chen;S. Dong;S. Bose;A. Gal-yam;T. Holoien;J. Kollmeier;M. Phillips;B. Shappee
通讯作者:
J. Prieto;Ping Chen;S. Dong;S. Bose;A. Gal-yam;T. Holoien;J. Kollmeier;M. Phillips;B. Shappee