Cosmic Explosions in Three Dimensions: Asymmetries in by Peter Höflich, Pawan Kumar, J. Craig Wheeler

By Peter Höflich, Pawan Kumar, J. Craig Wheeler

Highlights regimen supernova polarimetry and new insights into center cave in and thermonuclear explosions.

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Cosmic Explosions in Three Dimensions: Asymmetries in Supernovae and Gamma-Ray Bursts (2004)(en)(3

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Extra info for Cosmic Explosions in Three Dimensions: Asymmetries in Supernovae and Gamma-Ray Bursts (2004)(en)(3

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9 1999 Nov. 8 −1 −1 0 U(%) B 1 Fig. 5. Spectropolarimetry of the Type II plateau SN 1999em. The pre-max data cluster at the lower-right quadrant, while the data in the plateau phase are dispersed along a very well-defined line – an indication of a very well-defined geometry with no significant small scale fluctuations. 3 Thermonuclear supernovae 23 U (%) Q (%) 2 0 −2 2 0 −2 4000 6000 8000 Wavelength Fig. 6. Spectropolarimetry of the peculiar Type Ic SN 1997ef. 6 Hypernovae The association of peculiar Type Ic SN 1998bw with a faint GRB has led to the suggestion that SN Ib/c may be responsible for some GRBs.

2001, PASP, 113, 920 Leonard, D. , Filippenko, A. , Ardila, D. , & Brotherton, M. S. 2001, ApJ, 553, 861 Leonard, D. , Filippenko, A. , Barth, A. , & Matheson, T. 2000a, ApJ, 536, 239 Leonard, D. , Filippenko, A. , & Foley, R. J. 2002a, PASP, 114, 1333 Leonard, D. , Filippenko, A. , & Li, W. 2002b, AJ, 124, 2506 Leonard, D. , et al. 2002c, PASP, 114, 35 Leonard, D. , et al. 2002d, AJ, 124, 2490 Leonard, D. , Filippenko, A. , & Matheson, T. 2000b, in Cosmic Explosions, ed. S. S. Holt & W. W. Zhang (New York: AIP), 165 Leonard, D.

Deeper inside, the material is found to be spherical as evidenced by a sharp decrease of the polarization degree past optical maximum. This indicates that there is no significant chemical mixing in regions that were burned to thermonuclear equilibrium. Such a structure is consistent with what one expects from delayed detonation models but is in conflict with pure deflagration models. 2 mag. 4 SN 2002ic SN 2002ic is the first SN Ia showing evidence of ejecta-CSM interaction (Hamuy et al. 2003). We have obtained late time spectropolarimetry data at Subaru and the ESO VLT.

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