We calculate detailed NLTE synthetic spectra of a Pulsating Reverse Detonation (PRD) model, a novel explosion mechanism for Type Ia supernovae.While the hydro models are calculated in 3-D, the spectra use an angle averagedhydro model and thus some of the 3-D details are lost, but the overall averageshould be a good representation of the average observed spectra. We study themodel at 3 epochs: maximum light, seven days prior to maximum light, and 5 daysafter maximum light. At maximum the defining Si II feature is prominent, butthere is also a prominent C II feature, not usually observed in normal SNe Ianear maximum. We compare to the early spectrum of SN 2006D which did show aprominent C II feature, but the fit to the observations is not compelling.Finally we compare to the post-maximum UV+optical spectrum of SN 1992A. Withthe broad spectral coverage it is clear that the iron-peak elements on theoutside of the model push too much flux to the red and thus the particular PRDrealizations studied would be intrinsically far redder than observed SNe Ia. Webriefly discuss variations that could improve future PRD models.
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