The Shape of the Innards of a Type IIP Supernova

Details The Shape of the Innards of a Type IIP Supernova The Shape of the Innards of a Type IIP Supernova

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110516m&link_type=abstract

American Astronomical Society, AAS Meeting #211, #105.16; Bulletin of the American Astronomical Society, Vol. 39, p.931

Astronomy and Astrophysics

Astronomy

Scientific paper

Here we report 5 epochs of spectropolarimetry of the Type IIP SN 2001dh, spanning the intermediate phase between the end the of light curve plateau and the beginning of the tail phase. At the end of the plateau, the level of continuum polarization indicates an asymmetry of 30%. As the SN ages the degree of continuum polarization is not observed to increase, but the polarization of particular spectral lines increases dramatically (e.g. H I, He I and Na I). Immediately prior to the onset of the optically thin nebular phase, Na I D is observed to have a significant polarization of 2%. We highlight the potential problem of using Hα emission to determine the degree of the Interstellar Polarization, due to possible blending with He I λ6678.

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