Other
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..116s&link_type=abstract
NOAO Proposal ID #2010B-0116
Other
Scientific paper
We request 12 hours of GMOS rapid ToO time with the aim to to obtain a detailed time-series of optical spectroscopy for two young Type Ia supernova (SN) expected to be discovered by our search programs. The GMOS spectra will be matched with multi-epoch ultraviolet spectrophotometry to be obtained simultaneous under our Swift ToO program (P.I. R. Foley), as well as other ground based optical and near-IR observations. These data will unveil an unprecedented view of the spectral energy distribution and its evolution. Through modeling the complete time-series of spectra the abundance stratification of elements in the outer half of the ejecta will be mapped out. This will allow us to determine the degree of mixing of freshly synthesized elements. Understanding the extent of mixing provides stringent constraints on the explosion process and properties of the progenitor. Such a data set will also provide the ability to search for signatures of asymmetries in the explosion, interaction between the outer ejecta and circumstellar matter, as well as the presence of unburned carbon.
Filippenko Alex
Folatelli Gaston
Foley Ryan
Hamuy Mario
Li Weidong
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