Results 61 to 70 of about 80,732 (246)
A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary [PDF]
Science, 2018 Explosive origin of a binary neutron star Some types of core-collapse supernovae are known to produce a neutron star (NS). A binary NS merger was recently detected from its gravitational wave emission, but it is unclear how such a tight binary system can
K. De +31 more
semanticscholar +1 more source
Variable G versus the Accelerated Expansion of the Universe
Open Astronomy, 2017 It is shown that the hypothesis of permitting variability of the Newtonian constant G, increasing with the local density of dark matter, implies that there is no need for the introduction of a cosmological constant or accelerated expansion of the ...
Colenbrander Bernard G. +1 more
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International Astronomical Union Colloquium, 1996 Radio observations have shown that some supernovae are powerful radio emitters which increase rapidly in brightness to radio luminosities which are hundreds to thousands of times greater than even the brightest known supernova remnant, Cas A. They then fade over a period of weeks, months, or years.
Richard A. Sramek +3 more
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Collisional Triggering of Fast Flavor Conversions of Supernova Neutrinos. [PDF]
Physical Review Letters, 2018 Fast flavor conversions of supernova neutrinos, possible near the neutrinosphere, depends on an interesting interplay of collisions and neutrino oscillations. Contrary to naïve expectations, the rate of self-induced neutrino oscillations, due to neutrino-
F. Capozzi +4 more
semanticscholar +1 more source
Significance of neutrino-neutrino interaction in neutrino oscillation in core-collapse supernova
Bibechana, 2014 We study the possibility of neutrino-neutrino interaction inside the neutrino core of supernova (ρ ≥ 1010 g/cc) and outside the neutrinosphere. The angular dependence of the neutrino-neutrino interaction Hamiltonian causes multi-angle effects that can ...
Prabandha Nakarmi, Jeevan Jyoti Nakarmi
doaj +3 more sources
First Observations of SN 1604 (Kepler’s Supernova)
Universe, 2021 A supernova close enough to the Earth is a spectacular event: it can appear as a “new star” as luminous as Venus, or even more, visible for several days.
Alessandro de Angelis, Selenia Broccio
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Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets [PDF]
, 2008 We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations.
M. Kowalski +74 more
semanticscholar +1 more source
Limit on Supernova Emission in the Brightest Gamma-Ray Burst, GRB 221009A
The Astrophysical Journal Letters, 2023 We present photometric and spectroscopic observations of the extraordinary gamma-ray burst (GRB) 221009A in search of an associated supernova. Some past GRBs have shown bumps in the optical light curve that coincide with the emergence of supernova ...
Manisha Shrestha +32 more
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Nuclear Physics B - Proceedings Supplements, 2002 Core-collapse supernovae (SNe) are powerful neutrino sources and as such important targets for the growing array of neutrino observatories. We review the current status of SN theory and the expected characteristics of the neutrino signal. After recalling what we have learned from SN 1987A and general SN properties we review the physics potential of a ...
openaire +3 more sources
The Status of Multi-Dimensional Core-Collapse Supernova Models [PDF]
Publications Astronomical Society of Australia, 2016 Models of neutrino-driven core-collapse supernova explosions have matured considerably in recent years. Explosions of low-mass progenitors can routinely be simulated in 1D, 2D, and 3D.
Bernhard Müller
semanticscholar +1 more source