Results 51 to 60 of about 112,099 (203)

Explosive Nucleosynthesis in Helium Zones

The Astrophysical Journal, 1971
We study by numerical integration the network of nuclear reactions that are expected to occur when the helium zones of a star are instantaneously heated and allowed to expand adiabatically. The dependence of the results on nuclear cross-sections, on the peak temperature, and on the time scale of the hydrodynamic expansion are discussed.
Howard, W M, Arnett, W David, Clayton, Donald D   +2 more
openaire   +2 more sources

The Role of Neutrinos in Explosive Nucleosynthesis [PDF]

Proceedings of International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IX — PoS(NIC-IX), 2010
We present a new primary nucleosynthesis process, the # p-process, occurring in supernovae (and possibly gamma-ray bursts) when strong neutrino fluxes create proton-rich ejecta. In this process, antineutrino absorptions in the proton-rich environment produce neutrons that are immediately captured by neutron-deficient nuclei.
Fröhlich, C., Liebendörfer, M., Thielemann, F.-K., Martínez-Pinedo, G., Langanke, K., Zinner, Nikolaj Thomas, Hix, W.R., Bravo, E.   +7 more
openaire   +2 more sources

Neutrino treatment in multidimensional astrophysical simulations : a new spectral scheme [PDF]

, 2014
Neutrinos play a central role in modern physics and astrophysics. Their extremely weak interaction rate with baryons and other leptons makes their detection on the Earth difficult and challenging.
Perego, Albino
core   +1 more source

Stellar Evolution, SN Explosion, and Nucleosynthesis

, 2022
42 pages, 17 figures; Invited chapter for Handbook of X-ray and Gamma-ray Astrophysics (Eds. C. Bambi and A. Santangelo, Springer Singapore, expected in 2022).
openaire   +2 more sources

Massive stars: presupernova evolution and explosive nucleosynthesis

, 2020
. We review the current status of the research for the presupernova evolution of massive stars and their related explosive nucleosynthesis. We also discuss in detail some observational diagnostics for solar and zero metallicity massive star ...
M Limongi, A Chieffi
core  

The bulk mineralogy, elemental composition, and water content of the Winchcombe CM chondrite fall

Meteoritics &Planetary Science, Volume 59, Issue 5, Page 1006-1028, May 2024.
Abstract On the microscale, the Winchcombe CM carbonaceous chondrite contains a number of lithological units with a variety of degrees of aqueous alteration. However, an understanding of the average hydration state is useful when comparing to other meteorites and remote observations of airless bodies.
H. C. Bates, A. J. King, K. S. Shirley, E. Bonsall, C. Schröder, F. Wombacher, T. Fockenberg, R. J. Curtis, N. E. Bowles   +8 more
wiley   +1 more source

56Ni Production in Long-lived Binary Neutron Star Merger Remnants

The Astrophysical Journal Letters
We investigate the nucleosynthesis and kilonova emission based on numerical-relativity binary neutron star merger simulations that incorporate a two-moment neutrino-transport scheme.
Maximilian Jacobi, Fabio Magistrelli, Eleonora Loffredo, Giacomo Ricigliano, Leonardo Chiesa, Sebastiano Bernuzzi, Albino Perego, Almudena Arcones   +7 more
doaj   +1 more source

Nuclear astrophysicists at war

Natural Sciences, Volume 4, Issue 1, January 2024.
The Manhattan program not only opened the path to the nuclear age for humans, but also triggered a lot of new questions and research directions in nuclear physics and astrophysics that still inform the ideas in these fields today. Abstract The question of energy production in stars stimulated an entire generation of young physicists in the 1930s who ...
Michael Wiescher, Karlheinz Langanke
wiley   +1 more source

Chaos and turbulent nucleosynthesis prior to a supernova explosion [PDF]

AIP Advances, 2014
Three-dimensional (3D), time dependent numerical simulations of flow of matter in stars, now have sufficient resolution to be fully turbulent. The late stages of the evolution of massive stars, leading up to core collapse to a neutron star (or black hole), and often to supernova explosion and nucleosynthesis, are strongly convective because of vigorous
Arnett, W., Meakin, C., Viallet, M.
openaire   +4 more sources

Missing Titanium in the Asymmetric Supernova Remnant W 49B

The Astrophysical Journal
The progenitor of the W 49B supernova remnant is still under debate. One of the candidates is a jet-driven core-collapse supernova. In such a highly asymmetric explosion, a strong α -rich freeze-out is expected in local high-entropy regions, which should
Toshiki Sato, Makoto Sawada, Keiichi Maeda, John P. Hughes, Brian J. Williams   +4 more
doaj   +1 more source