Core-collapse supernovae, neutron stars & black holes in the light of physics of unstable nuclei

2006 ◽  
Author(s):  
Kohsuke Sumiyoshi
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Core Collapse ◽  
Unstable Nuclei

Dynamical versus isolated formation channels of gravitational wave sources

2018 ◽  
Vol 14 (S346) ◽  
pp. 397-416
Author(s):  
Michela Mapelli
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Theoretical Models ◽  
Stellar Winds ◽  
Core Collapse ◽  
Dynamical Processes ◽  
New Approach ◽  
The Impact

AbstractWhat are the formation channels of merging black holes and neutron stars? The first two observing runs of Advanced LIGO and Virgo give us invaluable insights to address this question, but a new approach to theoretical models is required, in order to match the challenges posed by the new data. In this review, I discuss the impact of stellar winds, core-collapse and pair instability supernovae on the formation of compact remnants in both isolated and dynamically formed binaries. Finally, I show that dynamical processes, such as the runaway collision scenario and the Kozai-Lidov mechanism, leave a clear imprint on the demography of merging systems.

scholarly journals Black Holes are a Mathematical Fantasy, not a Physical Reality

2019 ◽  
Vol 11 (4) ◽  
pp. 16
Author(s):  
Gurcharn S. Sandhu
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Neutron Stars ◽  
Physical Reality ◽  
Iron Core ◽  
Core Collapse ◽  
Compressive Stresses ◽  
Collapse Models ◽  
Solid Iron ◽  
Physical Foundation

With recent detection of black hole mergers by LIGO, the 'Black Holes' and 'Neutron Stars' have become common house-hold names, albeit fanciful names in public domain. However, for the scientific community black holes are the ultimate paradoxes of nature. The claimed observations of black hole mergers are in fact interpretations of certain observations under the spacetime model of Relativity. These interpretations can change significantly with the change in operating model of the phenomenon. A black hole is believed to be a ‘region of spacetime’ exhibiting such strong gravitational effects that nothing, not even light can escape from it. We demonstrate in this paper that this conviction is based on erroneous derivation for the gravitational redshift and the correct derivation shows that a photon cannot be prevented from escaping a gravitating body of any mass and size. Due to erroneous depiction of spacetime as a physical entity in GR, a mathematical singularity predicted by Schwarzschild metric solution of EFE has been projected as a physical possibility in the form of Black Holes. To strengthen the physical basis of Black Hole creation, the observations of Super Nova explosions are being interpreted under core collapse models. The core collapse models are now regarded as the physical foundation of Black Holes and Neutron stars. In this paper we have established the invalidity of current core collapse models on the grounds of treating electrons, ions and nuclei as non-interacting particles and using kinetic theory of gases for analyzing compressive stresses in solid iron core.

scholarly journals Nucleosynthesis of the Elements in Faint Supernovae and Hypernovae

2009 ◽  
Vol 5 (S265) ◽  
pp. 34-41
Author(s):  
Ken'ichi Nomoto ◽  
Takashi Moriya ◽  
Nozomu Tominaga
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Electron Capture ◽  
Massive Stars ◽  
Core Collapse ◽  
Agb Stars ◽  
Intermediate Mass ◽  
Normal Core ◽  
Intermediate Mass Black Holes

AbstractWe review the properties of supernovae (SNe) as a function of the progenitor's mass M. (1) Mup - 10 M⊙ stars are super-AGB stars and resultant electron capture SNe may be Faint supernovae like Type IIn SN 2008S. (2) 10 - 12 M⊙ stars undergo Fe-core collapse to form neutron stars (NSs) and Faint supernovae. (3) 12 M⊙ - MBN stars undergo Fe-core collapse to form NSs and normal core-collapse supernovae. (4) MBN - 90 M⊙ stars undergo Fe-core collapse to form Black Holes. Resultant supernovae are bifurcate into Hypernovae and Faint supernovae. The observed properties of SN 2008ha can be explained with this type of Faint supernovae. (5) 90 - 140 M⊙ stars produce Luminous SNe, like SNe 2007bi and 2006gy. (6) 140 - 300 M⊙ stars become pair-instability supernovae which could be Luminous supernovae (SNe 2007bi and 2006gy). (7) Very massive stars with M ≳ 300 M⊙ undergo core-collapse to form intermediate mass black holes. Some SNe could be more Luminous supernovae (like SN 2006gy).

Neutron Stars and "Black Holes"

1973 ◽  
Vol 110 (7) ◽  
pp. 441 ◽  
Author(s):  
Ya.B. Zel'dovich
Keyword(s):  
Black Holes ◽  
Neutron Stars

scholarly journals Black Holes in the Universe

1998 ◽  
Vol 11 (1) ◽  
pp. 28-41
Author(s):  
I.D. Novikov
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Neutron Stars ◽  
Supernova Explosions ◽  
The Universe

Some 30 years ago very few scientists thought that black holes may really exist. Attention focussed on the black hole hypothesis after neutron stars had been discovered. It was rather surprising that astrophysicists immediately ‘welcomed’ black holes. They found their place not only in the remnants of supernova explosions but also in the nuclei of galaxies and quasars.

Population Synthesis of Neutron Stars, Strange (Quark) Stars, and Black Holes

2002 ◽  
Vol 567 (1) ◽  
pp. L63-L66 ◽  
Author(s):  
Krzysztof Belczynski ◽  
Tomasz Bulik ◽  
Włodzimierz Kluźniak
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Strange Quark ◽  
Population Synthesis ◽  
Quark Stars
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