Results 31 to 40 of about 155,831 (295)
Neutrinos and nucleosynthesis in supernova [PDF]
Journal of Physics: Conference Series, 2006 The type II supernova is considered as a candidate site for the production of heavy elements. The nucleosynthesis occurs in an intense neutrino flux, we calculate the electron fraction in this environment.
L. G. Cabral-Rosetti +2 more
openaire +3 more sources
Neue Computermodelle erklären Sternexplosionen
Physik in unserer Zeit, Volume 54, Issue 6, Page 274-282, November 2023., 2023 Massereiche Sterne können am Ende ihres Lebens als Supernova explodieren, während ihr Kern zu einem Neutronenstern oder Schwarzen Loch kollabiert. Stetig verbesserte Computermodelle und die Entdeckung seltener Arten von Explosionen eröffnen immer tiefere Einblicke in die komplexen Phänomene beim Sternentod.
Hans‐Thomas Janka
wiley +1 more source
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
Die Geheimnisse hochdichter Materie
Physik in unserer Zeit, Volume 54, Issue 5, Page 238-245, September 2023., 2023 Neutronensterne gehören neben Schwarzen Löchern zu den extremsten Objekten des Universums. Wenn sie mit rund 20 % der Lichtgeschwindigkeit miteinander kollidieren, wird ein Teil ihrer Materie mit hoher Geschwindigkeit ausgestoßen. Dies und die Analyse von Gravitationswellen erlauben tiefe Einblicke in die Eigenschaften extrem dichter Materie in ihrem ...
Andreas Bauswein
wiley +1 more source
Space Weather, Volume 21, Issue 7, July 2023., 2023 Abstract The National Oceanic and Atmospheric Administration's Space Weather Prediction Center (NOAA/SWPC) issues several solar radiation storm products: the long standing proton Warnings and Alerts that are based on particle intensity levels observed by the Geostationary Operational Environmental Satellites; and the more recent International Civil ...
H. M. Bain +3 more
wiley +1 more source
Simple method of diagnosing fast flavor conversions of supernova neutrinos [PDF]
Physical Review D, 2018 Neutrinos emitted from a supernova may undergo flavor conversions almost immediately above the core, with possible consequences for supernova dynamics and nucleosynthesis.
B. Dasgupta, A. Mirizzi, M. Sen
semanticscholar +1 more source
Journal of Geophysical Research: Space Physics, Volume 128, Issue 2, February 2023., 2023 Abstract We present long‐term density trends of the Earth's upper atmosphere at altitudes between 71 and 116 km, based on atmospheric occultations of the Crab Nebula observed with X‐ray astronomy satellites, ASCA, RXTE, Suzaku, NuSTAR, and Hitomi. The combination of the five satellites provides a time period of 28 years from 1994 to 2022.
Satoru Katsuda +11 more
wiley +1 more source
Physics of Supernova Neutrinos [PDF]
Proceedings of International Workshop on Astroparticle and High Energy Physics — PoS(AHEP2003), 2003 n ...
Cecilia Lunardini
openalex +4 more sources
Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023 Abstract Star‐forming and starburst galaxies (SBGs), which are well‐known cosmic‐ray (CR) reservoirs, are expected to emit gamma rays and neutrinos predominantly via hadronic collisions. In this work we analyze the 10‐year Fermi‐Low Energy Technique (LAT) spectral energy distributions of 13 nearby galaxies by means of a physical model that accounts for
Antonio Marinelli +5 more
wiley +1 more source
Dark Energy from Cosmological Energy Conservation
Advances in Astronomy, Volume 2023, Issue 1, 2023., 2023 The value of the gravitational wave energy density is unknown. Current progress in gravitational wave detection suggests that the energy density of the stochastic gravitational wave background (SGWB) will be estimated in the next decades. A derivation of its value is presented under the assumption that energy lost due to cosmic redshift is fully ...
Manuel Uruena Palomo, Rubab Manzoor
wiley +1 more source