Unified One‐Dimensional Simulations of Gamma‐Ray Line Emission from Type Ia Supernovae

2004 ◽  
Vol 613 (2) ◽  
pp. 1101-1119 ◽  
Author(s):  
P. A. Milne ◽  
A. L. Hungerford ◽  
C. L. Fryer ◽  
T. M. Evans ◽  
T. J. Urbatsch ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Line Emission ◽  
Type Ia Supernovae ◽  
One Dimensional ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Understanding nebular spectra of Type Ia supernovae

2020 ◽  
Vol 494 (2) ◽  
pp. 2221-2235 ◽  
Author(s):  
Kevin D Wilk ◽  
D John Hillier ◽  
Luc Dessart
Keyword(s):  
Radiative Transfer ◽  
Local Thermodynamic Equilibrium ◽  
Diagnostic Feature ◽  
Type Ia Supernovae ◽  
Thermal Heating ◽  
One Dimensional ◽  
Type Ia ◽  
Natural Mechanism ◽  
Non Local ◽  
Ia Supernovae

ABSTRACT In this study, we present one-dimensional, non-local-thermodynamic-equilibrium, radiative transfer simulations (using cmfgen) in which we introduce micro-clumping at nebular times into two Type Ia supernova ejecta models. We use one sub-Chandrasekhar (sub-MCh) ejecta model with 1.04 M⊙ and one Chandrasekhar (MCh) ejecta model with 1.40 M⊙. We introduce clumping factors f = 0.33, 0.25, and 0.10, which are constant throughout the ejecta, and compare results to the unclumped f = 1.0 case. We find that clumping is a natural mechanism to reduce the ionization of the ejecta, reducing emission from [Fe iii], [Ar iii], and [S iii] by a factor of a few. For decreasing values of the clumping factor f, the [Ca ii] λλ7291,7324 doublet became a dominant cooling line for our MCh model but remained weak in our sub-MCh model. Strong [Ca ii] λλ7291,7324 indicates non-thermal heating in that region and may constrain explosion modelling. Due to the low abundance of stable nickel, our sub-MCh model never showed the [Ni ii] 1.939-μm diagnostic feature for all clumping values.

scholarly journals Luminosity–duration relations and luminosity functions of repeating and non-repeating fast radio bursts

2020 ◽  
Vol 494 (2) ◽  
pp. 2886-2904 ◽  
Author(s):  
Tetsuya Hashimoto ◽  
Tomotsugu Goto ◽  
Ting-Wen Wang ◽  
Seong Jin Kim ◽  
Simon C-C Ho ◽  
...  
Keyword(s):  
Neutron Star ◽  
Time Scale ◽  
Gamma Ray ◽  
Clear Correlation ◽  
Type Ia Supernovae ◽  
Radio Bursts ◽  
Luminosity Functions ◽  
Type Ia ◽  
Ia Supernovae ◽  
Two Populations

ABSTRACT Fast radio bursts (FRBs) are mysterious radio bursts with a time-scale of approximately milliseconds. Two populations of FRB, namely repeating and non-repeating FRBs, are observationally identified. However, the differences between these two and their origins are still cloaked in mystery. Here we show the time-integrated luminosity–duration (Lν–wint, rest) relations and luminosity functions (LFs) of repeating and non-repeating FRBs in the FRB Catalogue project. These two populations are obviously separated in the Lν-wint, rest plane with distinct LFs, i.e. repeating FRBs have relatively fainter Lν and longer wint, rest with a much lower LF. In contrast with non-repeating FRBs, repeating FRBs do not show any clear correlation between Lν and wint, rest. These results suggest essentially different physical origins of the two. The faint ends of the LFs of repeating and non-repeating FRBs are higher than volumetric occurrence rates of neutron star (NS) mergers and accretion-induced collapse (AIC) of white dwarfs (WDs), and are consistent with those of soft gamma-ray repeaters (SGRs), Type Ia supernovae (SNe Ia), magnetars, and WD mergers. This indicates two possibilities: either (i) faint non-repeating FRBs originate in NS mergers or AIC and are actually repeating during the lifetime of the progenitor, or (ii) faint non-repeating FRBs originate in any of SGRs, SNe Ia, magnetars, and WD mergers. The bright ends of LFs of repeating and non-repeating FRBs are lower than any candidates of progenitors, suggesting that bright FRBs are produced from a very small fraction of the progenitors regardless of the repetition. Otherwise, they might originate in unknown progenitors.

X- and gamma-ray signatures of type IA supernovae

1990 ◽  
Vol 360 ◽  
pp. 626 ◽  
Author(s):  
Adam Burrows ◽  
Lih-Sin The
Keyword(s):  
Gamma Ray ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Testing the distance–duality relation from strong gravitational lensing, type Ia supernovae and gamma-ray bursts data up to redshift z ∼ 3.6

2017 ◽  
Vol 26 (09) ◽  
pp. 1750097 ◽  
Author(s):  
Xiangyun Fu ◽  
Pengcheng Li
Keyword(s):  
Cosmological Model ◽  
Gravitational Lensing ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Type Ia Supernovae ◽  
Redshift Range ◽  
Strong Gravitational Lensing ◽  
Type Ia ◽  
Model Independent ◽  
Ia Supernovae

In this paper, we perform a cosmological model-independent test of the cosmic distance–duality relation (CDDR) in terms of the ratio of angular diameter distance (ADD) [Formula: see text] from strong gravitational lensing (SGL) and the ratio of luminosity distance (LD) [Formula: see text] obtained from the joint of type Ia supernovae (SNIa) Union2.1 compilation and the latest Gamma-Ray Bursts (GRBs) data, where the superscripts s and l correspond to the redshifts [Formula: see text] and [Formula: see text] at the source and lens from SGL samples. The purpose of combining GRB data with SNIa compilation is to test CDDR in a wider redshift range. The LD associated with the redshifts of the observed ADD is obtained through two cosmological model-independent methods, namely, method A: binning the SNIa+GRBs data, and method B: reconstructing the function of DL by combining the Crossing Statistic with the smoothing method. We find that CDDR is compatible with the observations at [Formula: see text] confidence level for the power law model which is assumed to describe the mass distribution of lensing systems with method B in a wider redshift range.

scholarly journals Utilizing the Updated Gamma-Ray Bursts and Type Ia Supernovae to Constrain the Cardassian Expansion Model and Dark Energy

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Jun-Jie Wei ◽  
Qing-Bo Ma ◽  
Xue-Feng Wu
Keyword(s):  
Dark Energy ◽  
Gamma Ray ◽  
Interpolation Method ◽  
Spline Interpolation ◽  
Confidence Region ◽  
Type Ia Supernovae ◽  
Distance Modulus ◽  
Type Ia ◽  
Ia Supernovae ◽  
Expansion Model

We update gamma-ray burst (GRB) luminosity relations among certain spectral and light-curve features with 139 GRBs. The distance modulus of 82 GRBs atz>1.4can be calibrated with the sample atz≤1.4by using the cubic spline interpolation method from the Union2.1 Type Ia supernovae (SNe Ia) set. We investigate the joint constraints on the Cardassian expansion model and dark energy with 580 Union2.1 SNe Ia sample(z<1.4)and 82 calibrated GRBs’ data(1.4<z≤8.2). In ΛCDM, we find that adding 82 high-zGRBs to 580 SNe Ia significantly improves the constraint onΩm-ΩΛplane. In the Cardassian expansion model, the best fit isΩm=0.24-0.15+0.15andn=0.16-0.52+0.30  (1σ), which is consistent with the ΛCDM cosmology(n=0)in the1σconfidence region. We also discuss two dark energy models in which the equation of statew(z)is parameterized asw(z)=w0andw(z)=w0+w1z/(1+z), respectively. Based on our analysis, we see that our universe at higher redshift up toz=8.2is consistent with the concordance model within1σconfidence level.

scholarly journals One-dimensional delayed-detonation models of Type Ia supernovae: confrontation to observations at bolometric maximum

2012 ◽  
Vol 429 (3) ◽  
pp. 2127-2142 ◽  
Author(s):  
Stéphane Blondin ◽  
Luc Dessart ◽  
D. John Hillier ◽  
Alexei M. Khokhlov
Keyword(s):  
Type Ia Supernovae ◽  
One Dimensional ◽  
Type Ia ◽  
Ia Supernovae

Gamma-Ray Escape in Type IA Supernovae: The 847 keV--m B Diagram

1993 ◽  
Vol 417 ◽  
pp. 547 ◽  
Author(s):  
P. Ruiz-Lapuente ◽  
G. G. Lichti ◽  
R. Lehoucq ◽  
R. Canal ◽  
M. Casse
Keyword(s):  
Gamma Ray ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae
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