scholarly journals Reconstructing the weak lensing magnification distribution of type Ia supernovae

2019 ◽  
Vol 99 (8) ◽  
Author(s):  
Zhongxu Zhai ◽  
Yun Wang
Keyword(s):  
Weak Lensing ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Measuring weak lensing correlations of Type Ia supernovae

2016 ◽  
Vol 465 (3) ◽  
pp. 2862-2872 ◽  
Author(s):  
D. Scovacricchi ◽  
R. C. Nichol ◽  
E. Macaulay ◽  
D. Bacon
Keyword(s):  
Weak Lensing ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Weak lensing of Type Ia Supernovae from the Dark Energy Survey

2020 ◽  
Vol 496 (3) ◽  
pp. 4051-4059
Author(s):  
E Macaulay ◽  
D Bacon ◽  
R C Nichol ◽  
T M Davis ◽  
J Elvin-Poole ◽  
...  
Keyword(s):  
Dark Energy ◽  
Gravitational Lensing ◽  
Weak Lensing ◽  
Type Ia Supernovae ◽  
Light Curve Analysis ◽  
Dark Energy Survey ◽  
Type Ia ◽  
Angular Correlation Function ◽  
Ia Supernovae ◽  
Energy Survey

ABSTRACT We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES). We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2$^{+0.9}_{-0.8}$. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8$^{+1.1}_{-0.7}$. The comparable uncertainty in σ8 between DES–SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES–SN sample, and improvements in the calibration and data analysis.

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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