NOAO >   Observing Info >   Approved Programs >   2011B-0503

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Proposal Information for 2011B-0503


PI: Dan Milisavljevic, Dartmouth College, danmil@dartmouth.edu
Address: Department of Physics and Astronomy, 6127 Wilder Laboratory, Hanover, NH, 03755-3528, USA

CoI: Alicia Soderberg, Harvard University
CoI: Roger Chevalier, University of Virginia
CoI: Robert Kirshner, Harvard University
CoI: Robert Fesen, Dartmouth College
CoI: Elena Pian
CoI: Paolo Mazzali
CoI: Claes Fransson
CoI: Stephan Hachinger

Title: Resolving SN Ejecta Asymmetries with High-Dispersion Spectra

Abstract: The connection between gamma-ray bursts and stripped-envelope supernovae is well established in broad terms. Clearly some massive stars are able to give rise to relativistic jets at the moment of explosion. A more fundamental question has become whether ejecta asymmetries are inherent to all stripped-envelope supernovae. Nebular spectroscopy of supernovae ( > 2 months post explosion) probe the deepest layers within the explosion and may reveal strong deviations from the expected spherical "onion-structure". Along this line, recent low resolution nebular spectra have revealed evidence for ejecta asymmetries, but the extent of the asymmetries and a deeper understanding require higher resolution. Here we propose for high-dispersion nebular spectra of the nearest stripped envelope SNe designed to directly address this puzzle.


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NOAO >   Observing Info >   Approved Programs >   2011B-0503

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