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Multi-Epoch High-Spectral-Resolution Observations of Neutral Sodium in 14 Type Ia Supernovae
A. Sternberg, A. Gal Yam, J. D. Simon +16
One of the main questions concerning Type Ia supernovae is the nature of the binary companion of the exploding white dwarf. A major discriminant between different suggested models…
SN 2010lp---a Type Ia supernova from a violent merger of two carbon--oxygen White Dwarfs
M. Kromer, R. Pakmor, S. Taubenberger +6
SN 2010lp is a subluminous Type Ia supernova (SN Ia) with slowly-evolving lightcurves. Moreover, it is the only subluminous SN Ia observed so far that shows narrow emission lines o…
Synthetic light curves and spectra for three-dimensional delayed-detonation models of Type Ia supernovae
S. A. Sim, I. R. Seitenzahl, M. Kromer +7
In a companion paper, Seitenzahl et al. (2013) presented a set of three-dimensional delayed detonation models for thermonuclear explosions of near-Chandrasekhar mass white dwarfs (…
[OI] 6300,6364 in the nebular spectrum of a subluminous Type Ia supernova
S. Taubenberger, M. Kromer, R. Pakmor +5
In this letter a late-phase spectrum of SN 2010lp, a subluminous Type Ia supernova (SN Ia), is presented and analysed. As in 1991bg-like SNe Ia at comparable epochs, the spectrum i…
Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for Type Ia supernovae
M. Fink, M. Kromer, I. R. Seitenzahl +6
We investigate whether pure deflagration models of Chandrasekhar-mass carbon-oxygen white dwarf stars can account for one or more subclass of the observed population of Type Ia sup…
The impact of Type Ia supernova explosions on helium companions in the Chandrasekhar-mass explosion scenario
Zheng-Wei Liu, Ruediger Pakmor, Ivo Seitenzahl +8
In the version of the SD scenario of SNe Ia studied here, a CO WD explodes close to the Chandrasekhar limit after accreting material from a non-degenerate He companion. In the pres…
'Super-Chandrasekhar' Type Ia Supernovae at nebular epochs
Stefan Taubenberger, Markus Kromer, Stephan Hachinger +11
We present a first systematic comparison of superluminous Type Ia supernovae (SNe Ia) at late epochs, including previously unpublished photometric and spectroscopic observations of…
Gamma-ray diagnostics of Type Ia supernovae: Predictions of observables from three-dimensional modeling
A. Summa, A. Ulyanov, M. Kromer +11
Besides the fact that the gamma-ray emission due to radioactive decays is responsible for powering the light curves of Type Ia supernovae (SNe Ia), gamma rays themselves are of par…
The rotation of surviving companion stars after type Ia supernova explosions in the WD+MS scenario
Zheng-Wei Liu, Ruediger Pakmor, Friedrich K. Roepke +5
In the SD scenario of SNe Ia the companion survives the SN explosion and thus should be visible near the center of the SN remnant and may show some unusual features. A promising ap…
Towards an understanding of Type Ia supernovae from a synthesis of theory and observations
W. Hillebrandt, M. Kromer, F. K. Röpke +1
Motivated by the fact that calibrated light curves of Type Ia supernovae (SNe Ia) have become a major tool to determine the expansion history of the Universe, considerable attentio…
p-process in SNIA
C. Travaglio, R. Gallino, W. Hillebrandt +1
We explore SNIa as p-process sources in the framework of two-dimensional SNIa models using enhanced s-seed distributions as directly obtained from a sequence of thermal pulse insta…
Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory
R. Pereira, R. C. Thomas, G. Aldering +36
We present 32 epochs of optical (3300-9700 Å) spectrophotometric observations of the nearby quintessential "normal" type Ia supernova (SN Ia) SN 2011fe in the galaxy M101, extendin…