CURRENT STATUS OF TYPE IA SUPERNOVAE THEORY AND THEIR ROLE IN COSMOLOGY

2003 ◽  
Author(s):  
S. BLINNIKOV
Keyword(s):  
Current Status ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Late Light Curves of Type Ia SNe

2005 ◽  
Vol 192 ◽  
pp. 183-188
Author(s):  
Peter A. Milne ◽  
G.Grant Williams
Keyword(s):  
Magnetic Fields ◽  
Energy Deposition ◽  
Light Curves ◽  
Current Status ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

SummaryAt late times, the energy deposition in the ejecta of type Ia supernovae is dominated by the slowing of energetic positrons produced in 56Co → 56Fe decays. Through comparisons of simulations of energy deposition in SN Ia models with observed light curves from supernovae, we study the positron transport and thus the magnetic fields of SNe Ia. In this paper, we summarize the current status of these investigations, emphasizing the observations made of two recent SNe Ia, 1999by and 2000cx.

scholarly journals Synthetic Spectra for Type Ia Supernovae at Early Epochs

2005 ◽  
Vol 192 ◽  
pp. 327-332
Author(s):  
D.N. Sauer ◽  
A.W.A. Pauldrach ◽  
T. Hoffmann ◽  
W. Hillebrandt
Keyword(s):  
Electron Scattering ◽  
Current Status ◽  
Synthetic Spectrum ◽  
Type Ia Supernovae ◽  
Near Ir ◽  
Synthetic Spectra ◽  
Type Ia ◽  
Quantitative Analyses ◽  
Adequate Representation ◽  
Ia Supernovae

SummaryWe present the current status of our construction of synthetic spectra for type Ia supernovae. These properly take into account the effects of NLTE and an adequate representation of line blocking and blanketing. The models are based on a sophisticated atomic database. We show that the synthetic spectrum reproduces the observed spectrum of ‘normal’ SN-Ia near maximum light from the UV to the near-IR. However, further improvements are necessary before truly quantitative analyses of observed SN-Ia spectra can be performed. In particular, the inner boundary condition has to be fundamentally modified. This is due to the dominance of electron scattering over true absorption processes coupled with the flat density structure in these objects.

Hard X‐Rays and Gamma Rays from Type Ia Supernovae

1998 ◽  
Vol 492 (1) ◽  
pp. 228-245 ◽  
Author(s):  
P. Hoflich ◽  
J. C. Wheeler ◽  
A. Khokhlov
Keyword(s):  
Gamma Rays ◽  
Type Ia Supernovae ◽  
X Rays ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Gravitational Collapse versus Thermonuclear Explosion of Degenerate Stellar Cores

1994 ◽  
Vol 147 ◽  
pp. 186-213
Author(s):  
J. Isern ◽  
R. Canal
Keyword(s):  
Neutron Star ◽  
White Dwarfs ◽  
Light Curves ◽  
Type Ia Supernovae ◽  
Radioactive Elements ◽  
Border Line ◽  
Thermonuclear Explosion ◽  
Type Ia ◽  
Γ Rays ◽  
Ia Supernovae

AbstractIn this paper we review the behavior of growing stellar degenerate cores. It is shown that ONeMg white dwarfs and cold CO white dwarfs can collapse to form a neutron star. This collapse is completely silent since the total amount of radioactive elements that are expelled is very small and a burst of γ-rays is never produced. In the case of an explosion (always carbonoxygen cores), the outcome fits quite well the observed properties of Type Ia supernovae. Nevertheless, the light curves and the velocities measured at maximum are very homogeneous and the diversity introduced by igniting at different densities is not enough to account for the most extreme cases observed. It is also shown that a promising way out of this problem could be the He-induced detonation of white dwarfs with different masses. Finally, we outline that the location of the border line which separetes explosion from collapse strongly depends on the input physics adopted.

scholarly journals A Novel Color Parameter as a Luminosity Calibrator for Type Ia Supernovae

2005 ◽  
Vol 620 (2) ◽  
pp. L87-L90 ◽  
Author(s):  
Xiaofeng Wang ◽  
Lifan Wang ◽  
Xu Zhou ◽  
Yu-Qing Lou ◽  
Zongwei Li
Keyword(s):  
Type Ia Supernovae ◽  
Color Parameter ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Kernel PCA for Type Ia supernovae photometric classification

2013 ◽  
Vol 430 (1) ◽  
pp. 509-532 ◽  
Author(s):  
E. E. O. Ishida ◽  
R. S. de Souza
Keyword(s):  
Type Ia Supernovae ◽  
Kernel Pca ◽  
Type Ia ◽  
Ia Supernovae
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