Type IA Supernovae and Chemical Evolution of Galaxies

2002 ◽  
Vol 187 ◽  
pp. 33-46
Author(s):  
K. Nomoto ◽  
C. Kobayashi ◽  
H. Umeda
Keyword(s):  
Chemical Evolution ◽  
White Dwarfs ◽  
Binary Systems ◽  
Cosmological Parameters ◽  
Type Ia Supernovae ◽  
Exact Nature ◽  
Type Ia ◽  
Low Metallicity ◽  
Strong Winds ◽  
Ia Supernovae

The cosmic/galactic chemical evolutions have been modeled with the early metal enrichment by Type II supernovae (SNe II) and the delayed enrichment of Fe by Type Ia supernovae (SNe Ia). However, the exact nature of SN Ia progenitors have been obscure. Here we present the currently most plausible scenario of the progenitor binary systems of SNe Ia. This scenario involves strong winds from accreting white dwarfs, which introduces important metallicity effects, namely, low-metallicity inhibition of SNe Ia. Resultant predictions for the Galactic/cosmic chemical evolution and the cosmic SNe Ia rate are presented. Another importance of identifying the SN Ia progenitors lies in the use of SNe Ia as a “standard candle” to determine cosmological parameters. To examine whether the “evolution” of SNe Ia with redshift and metallicity is significant, we discuss how the metallicity affects the properties of the C+O white dwarfs such as the C/O ratio, and find the metallicity dependence is rather weak.

scholarly journals Effect of Cosmic Mean Metallicity on the Supernovae Cosmology

2021 ◽  
Vol 162 (6) ◽  
pp. 249
Author(s):  
Gexing Li ◽  
Zhihong Li
Keyword(s):  
Chemical Evolution ◽  
Cosmological Parameters ◽  
Type Ia Supernovae ◽  
Delay Times ◽  
Standard Candle ◽  
Type Ia ◽  
Ia Supernovae

Abstract The initial metallicity of Type Ia Supernovae (SNe Ia) progenitor that is increasing with the cosmological chemical evolution will directly lead to a decrease of the 56Ni formed during the nucleosynthesis and then a varying standard candle. The variation may seriously affect our understanding of the evolving universe. In this work, we derived the relationships between 56Ni yield and metallicity in different progenitor channels. The evolution of the cosmic mean metallicity (CMM) was used to estimate the initial metallicity of progenitors. The effect of the delay times from the birth of progenitors to their explosion was also considered. The corrections of SNe Ia luminosity were estimated and the influences of the different progenitor channels and CMM evolution rates were examined. Several important cosmological parameters were updated according to the luminosity corrections.

scholarly journals Correlation of the rate of Type Ia supernovae with the parent galaxy properties: Light and shadows

2019 ◽  
Vol 625 ◽  
pp. A113 ◽  
Author(s):  
L. Greggio ◽  
E. Cappellaro
Keyword(s):  
Binary Systems ◽  
Cosmological Parameters ◽  
Stellar Populations ◽  
Star Formation History ◽  
Close Binary ◽  
Type Ia Supernovae ◽  
Wide Range ◽  
Type Ia ◽  
Ia Supernovae ◽  
Parent Galaxy

Context. The identification of the progenitors of Type Ia supernovae (SNIa) is extremely important in several astrophysical contexts, ranging from stellar evolution in close binary systems to evaluating cosmological parameters. Determining the distribution of the delay times (DTD) of SNIa progenitors can shed light on their nature. The DTD can be constrained by analysing the correlation between the SNIa rate and those properties of the parent galaxy which trace the average age of their stellar populations. Aims. We investigate the diagnostic capabilities of this correlation by examining its systematics with the various parameters at play: simple stellar population models, the adopted description for the star formation history (SFH) in galaxies, and the way in which the masses of the galaxies are evaluated. Methods. We computed models for the diagnostic correlations for a variety of input ingredients and for a few astrophysically motivated DTD laws appropriate for a wide range of possibilities for the SNIa progenitors. The models are compared to the results of three independent observational surveys. Results. The scaling of the SNIa rate with the properties of the parent galaxy is sensitive to all input ingredients mentioned above. This is a severe limitation on the possibility to discriminate alternative DTDs. In addition, current surveys show some discrepancies for the reddest and bluest galaxies, likely because of limited statistics and the inhomogeneity of the observations. For galaxies with intermediate colours the rates are in agreement, leading to a robust determination of the productivity of SNIa from stellar populations of ≃0.8 events per 1000 M⊙. Conclusions. Large stastistics of SNIa events along with accurate measurements of the SFH in the galaxies are required to derive firm constraints on the DTD. The LSST will achieve these results by providing a homogeneous, unbiased, and vast database on both SNIa and galaxies.

scholarly journals Low-Metallicity Inhibition of Type Ia Supernovae and Galactic and Cosmic Chemical Evolution

1998 ◽  
Vol 503 (2) ◽  
pp. L155-L159 ◽  
Author(s):  
Chiaki Kobayashi ◽  
Takuji Tsujimoto ◽  
Ken'ichi Nomoto ◽  
Izumi Hachisu ◽  
Mariko Kato
Keyword(s):  
Chemical Evolution ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Low Metallicity ◽  
Ia Supernovae

scholarly journals Type Ia Supernovae from Sub-Chandrasekhar Mass White Dwarfs

2011 ◽  
Vol 7 (S281) ◽  
pp. 267-274
Author(s):  
Stuart A. Sim ◽  
Friedrich K. Röpke ◽  
Markus Kromer ◽  
Michael Fink ◽  
Ashley J. Ruiter ◽  
...  
Keyword(s):  
White Dwarfs ◽  
Binary Systems ◽  
Light Curves ◽  
Type Ia Supernovae ◽  
Type Ia Supernova ◽  
Type Ia ◽  
Ia Supernovae

AbstractWe argue that detonations of sub-Chandrasekhar mass white dwarfs can lead to bright explosions with light curves and spectra similar to those of observed Type Ia supernovae. Given that binary systems containing accreting sub-Chandrasekhar mass white dwarfs should be common, this suggests that a non-negligible fraction of the observed Type Ia supernova rate may arise from sub-Chandrasekhar mass explosions, if they can be ignited. We discuss aspects of how such explosions might be realized in nature and both merits and challenges associated with invoking sub-Chandrasekhar mass explosion models to account for observed Type 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 Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-degenerate Double-detonation Type Ia Supernovae

2018 ◽  
Vol 865 (1) ◽  
pp. 15 ◽  
Author(s):  
Ken J. Shen ◽  
Douglas Boubert ◽  
Boris T. Gänsicke ◽  
Saurabh W. Jha ◽  
Jennifer E. Andrews ◽  
...  
Keyword(s):  
White Dwarfs ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae ◽  
Gaia Dr2

scholarly journals Multidimensional Parameter Study of Double Detonation Type Ia Supernovae Originating from Thin Helium Shell White Dwarfs

2021 ◽  
Vol 919 (2) ◽  
pp. 126
Author(s):  
Samuel J. Boos ◽  
Dean M. Townsley ◽  
Ken J. Shen ◽  
Spencer Caldwell ◽  
Broxton J. Miles
Keyword(s):  
White Dwarfs ◽  
Parameter Study ◽  
Type Ia Supernovae ◽  
Multidimensional Parameter ◽  
Type Ia ◽  
Ia Supernovae

Cosmological Parameters as Measured by Type Ia Supernovae

1999 ◽  
pp. 328-333
Author(s):  
Bruno Leibundgut ◽  
Brian Schmidt ◽  
Jason Spyromilio ◽  
Mark Phillips
Keyword(s):  
Cosmological Parameters ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

scholarly journals Are the Precursors of Type Ia Supernovae Double Degenerate Mergers?

2004 ◽  
Vol 194 ◽  
pp. 111-112
Author(s):  
Lilia Ferrario
Keyword(s):  
Neutron Stars ◽  
White Dwarf ◽  
White Dwarfs ◽  
Observational Evidence ◽  
Type Ia Supernovae ◽  
Type Ia ◽  
Ia Supernovae

AbstractI argue that the observational evidence for white dwarf-white dwarf mergers supports the view that they give rise to ultra-massive white dwarfs or neutron stars through accretion induced collapse. The implications for the progenitors of Type Ia SNe are discussed.

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