Subaru Seminars



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The Subaru Seminar is usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you are interested in giving a seminar, please contact Subaru seminar organizers (Tomonori Usuda, Kumiko S. Usuda, Masahiko Hayashi, Masayuki Akiyama) by email.

May 2, Monday at 3:30pm

" Probing the physics of supernova explosions with spectropolarimetry;

Lifan Wang (Lawrence Berkeley National Laboratory)

The tool of spectropolarimetry applied to supernovae has shown that core collapse supernovae are strongly asymmetric and that Type Ia supernovae are less so, but still systematically asymmetric. These studies have led to new insights into the explosion mechanisms of both core-collapse and thermonuclear supernovae. The explosion of core-collapse supernovae is intrinsically 3-dimensional and there are strong evidences that the explosion is affected by the rotation of the progenitor star. Polarimetry studies of SN Ia may give long sought clues to the binary nature of Type Ia supernovae. The outer most layers of some SNIa are found to be consistent with being from turbulent burning, but with iron confined into lower velocity regions. These observations support the popular delayed-detonation models but also provide clues for further improvement of explosion models. These understandings of SNIa provide new insights into the origin of the observed scatter in the properties of Type Ia. They may help in making SN Ia even more precise tools of cosmology.

Seminars are also held at JAC, CFHT, and IfA.

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