Late-Time Optical Spectra of Core-Collapse Supernovae

Details Late-Time Optical Spectra of Core-Collapse Supernovae Late-Time Optical Spectra of Core-Collapse Supernovae

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733719m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #337.19; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Optical spectra of several core-collapse supernovae obtained many years to decades after outburst are presented and discussed with the aim of understanding general properties of late-time emission. Common to most of these spectra are strongly asymmetric line profiles exhibiting predominantly blueshifted emission in hydrogen and/or oxygen, with major emission peaks centered at -2000 to -6000 km/s. Observed emission line profiles and relative line fluxes are compared against theoretical models to probe the chemical abundances of the ejecta and the extent of turbulent mixing. We discuss the possible nature of the observed blueshifted peaks and likely late-time emission energy sources including circumstellar interaction, radioactive decay, and pulsar wind nebulae.

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