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Three-Dimensional Simulations of Tidally Disrupted Solar-Type Stars and the Observational Signatures of Shock Breakout
James Guillochon, Enrico Ramirez-Ruiz, Stephan Rosswog +1
We describe a three-dimensional simulation of a solar-type star approaching a black hole on a parabolic orbit with a pericenter distance well withi…
Detonating Failed Deflagration Model of Thermonuclear Supernovae II. Comparison to Observations
Daniel Kasen, Tomasz Plewa
We develop and demonstrate the methodology of testing multi-dimensional supernova models against observations by studying the properties of one example of the detonation from faile…
On the Origin of the Type Ia Supernova Width-Luminosity Relation
Daniel Kasen, S. E. Woosley
Brighter Type Ia supernovae (SNe Ia) have broader, more slowly declining B-band light curves than dimmer SNe Ia. We study the physical origin of this width-luminosity relation (WLR…
Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
Daniel Kasen
We undertake a theoretical study of the near-infrared (NIR) lightcurves of Type Ia supernovae (SNe Ia). In these bands, the lightcurves are distinguished by a secondary maximum occ…
Quantitative Spectroscopy of Supernovae for Dark Energy Studies
E. Baron, David Branch, David Jeffery +6
Detailed quantitative spectroscopy of Type Ia supernovae (SNe~Ia) provides crucial information needed to minimize systematic effects in both ongoing SNe Ia observational programs s…
Spectral Signatures of Gravitationally Confined Thermonuclear Supernova Explosions
Daniel Kasen, Tomasz Plewa
We consider some of the spectral and polarimetric signatures of the gravitational confined detonation scenario for Type Ia supernova explosions. In this model, material produced by…
Reading the Spectra of the Most Peculiar Type Ia Supernova 2002cx
David Branch, E. Baron, R. C. Thomas +3
In spite of the apparent lack of Si II and S II features in its spectra, SN 2002cx was classified as a peculiar Type Ia supernova (SN Ia) on the basis of its overall photometric an…
Spectroscopic Observations and Analysis of the Peculiar SN 1999aa
G. Garavini, G. Folatelli, A. Goobar +55
We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect…
Direct Analysis of Spectra of the Peculiar Type Ia Supernova 2000cx
D. Branch, R. C. Thomas, E. Baron +6
The Type Ia SN 2000cx exhibited multiple peculiarities, including a lopsided B-band light-curve peak that does not conform to current methods for using shapes of light curves to st…
Could There Be A Hole In Type Ia Supernovae?
Daniel Kasen, Peter Nugent, R. C. Thomas +1
In the favored progenitor scenario, Type Ia supernovae arise from a white dwarf accreting material from a non-degenerate companion star. Soon after the white dwarf explodes, the ej…
Spectropolarimetry of SN 2001el in NGC 1448: Asphericity of a Normal Type Ia Supernova
Lifan Wang, Dietrich Baade, Peter Hoeflich +6
High-quality spectropolarimetry (range 417-860 nm; spectral resolution 1.27 nm and 0.265 nm/pixel) of the SN Ia 2001el were obtained with the ESO Very Large Telescope Melipal (+ FO…
Analysis of the Flux and Polarization Spectra of the Type Ia Supernova SN 2001el: Exploring the Geometry of the High-velocity Ejecta
Daniel Kasen, Peter Nugent, Lifan Wang +6
SN 2001el is the first normal Type Ia supernova to show a strong, intrinsic polarization signal. In addition, during the epochs prior to maximum light, the CaII IR triplet absorpti…
A Complete Analytic Inversion of Supernova Lines in the Sobolev Approximation
Daniel Kasen, David Branch, E. Baron +1
We show that the shape of P-Cygni line profiles of photospheric phase supernova can be analytically inverted to extract both the optical depth and source function of the line -- i.…
Spectral Consequences of Deviation from Spherical Composition Symmetry in Type Ia Supernovae
R. C. Thomas, Daniel Kasen, David Branch +1
We investigate the prospects for constraining the maximum scale of clumping in composition that is consistent with observed Type Ia supernova flux spectra. Synthetic spectra genera…