A Comprehensive Study of Dust Formation in Type II SNe with HST, SST, and Gemini

Details A Comprehensive Study of Dust Formation in Type II SNe with HST, SST, and Gemini A Comprehensive Study of Dust Formation in Type II SNe with HST, SST, and Gemini

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60071a&link_type=abstract

Spitzer Proposal ID #60071

Physics

Scientific paper

Recent detections of large amounts of dust in high redshift galaxies imply that Type II supernovae (SNe) may be important dust contributors. The dust in high-z galaxies must come from young, massive stars, so Type II SNe are one of the few possible sources. We propose to continue monitoring of four nearby Type II SNe: 2004et, 2007it, 2007oc, and 2007od, in order to study dust formation in the ejecta of Type II SNe. The three observational signatures of this dust formation include, a decrease in the continuum brightness in the visible, a developing infrared excess, and asymmetric, blue-shifted emission-line profiles. With Spitzer, we will be able to carefully study the IR emission, and put strong constraints on the dust mass and how the dust changes with time. The proposed observations will be combined with previous epochs of Spitzer data and coordinated, already approved Gemini and HST observations. We may be able to double the number of Type II SNe known to have shown all three dust formation signaturesE This increased sample size will help us to better understand what fraction of Type II SNe produce dust, how much dust they produce, and how conditions in the SNe ejecta affect the dust formation. These estimates will help us to deduce whether Type II SNe can be a major source of dust in young, high redshift galaxies.

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