Carnegie Supernova Project-II: A New Method to Photometrically Identify Sub-types of Extreme Type Ia Supernovae

Abstract In this paper, we implement a new method to test the invariance of the speed of light (c) as a function of redshift, by combining the measurements of galaxy cluster gas mass fraction, H(z) from cosmic chronometers, and Type-Ia supernovae (SNe Ia). In our analyses, we consider both a constant depletion factor (which corresponds to the ratio by which the cluster gas mass fraction is depleted with respect to the universal baryonic mean) and one varying with redshift. We also consider the influence of different H 0 estimates on our results. We look for a variation of c, given by c(z) = c 0(1+c 1 z). We find a degeneracy between our final results on c variation and the assumptions on the gas mass fraction depletion factor. Most of our analyses indicate negligible variation of the speed of light.

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Hard X‐Rays and Gamma Rays from Type Ia Supernovae

The Astrophysical Journal ◽

10.1086/305018 ◽

1998 ◽

Vol 492 (1) ◽

pp. 228-245 ◽

Cited By ~ 25

Author(s):

P. Hoflich ◽

J. C. Wheeler ◽

A. Khokhlov

Keyword(s):

Gamma Rays ◽

Type Ia Supernovae ◽

X Rays ◽

Type Ia ◽

Ia Supernovae

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Evolution of 3–9M⊙Stars for \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $Z=0.001- 0.03$ \end{document} and Metallicity Effects on Type Ia Supernovae

The Astrophysical Journal ◽

10.1086/306887 ◽

1999 ◽

Vol 513 (2) ◽

pp. 861-868 ◽

Cited By ~ 121

Author(s):

Hideyuki Umeda ◽

Ken'ichi Nomoto ◽

Hitoshi Yamaoka ◽

Shinya Wanajo

Keyword(s):

Type Ia Supernovae ◽

Type Ia ◽

Ia Supernovae

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Gravitational Collapse versus Thermonuclear Explosion of Degenerate Stellar Cores

International Astronomical Union Colloquium ◽

10.1017/s0252921100026373 ◽

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.

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