Results 31 to 40 of about 12,181 (205)
Black holes as “time capsules”: A cosmological graviton background and the Hubble tension
Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023 Abstract Minuscule primordial black holes (BHs) before the end and after inflation can serve as “time capsules” bringing back energy from the past to a later epoch when they evaporate. As these BHs behave like matter, while the rest of the universe's content behaves like radiation, the mass fraction of these BHs, which is tiny at formation, becomes ...
Tsvi Piran, Raul Jimenez
wiley +1 more source
Screening Effects in Stars and in the Laboratory
Frontiers in Physics, 2022 Nuclear reactions are the driver of the evolution of many astrophysical objects. In the astrophysical environment their respective reaction rates are, however, modified due to the presence of other charges.
Marialuisa Aliotta +2 more
doaj +1 more source
Neutrinos and Heavy Element Nucleosynthesis [PDF]
In: Tanihata, I., Toki, H., Kajino, T. (eds) Handbook of Nuclear
Physics . Springer, Singapore (2023), 2023 This chapter discusses three nucleosynthesis processes involved in producing heavy nuclei beyond the iron group that are influenced or shaped by neutrino interactions: the v process, the vp process and the r process. These processes are all related to explosive events involving compact objects, such as core-collapse supernovae and binary neutron star ...
arxiv +1 more source
Experiments probing clustering effects in explosive nucleosynthesis
Frontiers in Physics, 2023 Nuclear clustering affects the nucleosynthesis occurring in a number of astrophysical environments. Highly-clusterized nuclear states typically occur near particle thresholds and therefore can produce dramatic impacts on the nuclear reaction rates.
D. W. Bardayan
doaj +1 more source
Nucleosynthesis in classical novae [PDF]
Nuclear Physics A, 2001 A general review of the relevance of classical novae for the chemical evolution of the Galaxy, as well as for Galactic radioactivity is presented. A special emphasis is put on the pioneering work done by Jim Truran in this field of research. The impact of recent developments in nuclear astrophysics on nova nucleosynthesis, together with the prospects ...
Hernanz, M., Jose, J., Coc, A.
openaire +5 more sources
Properties and Composition of Magnetized Nuclei
Particles, 2020 The properties and mass distribution of the ultramagnetized atomic nuclei which arise in heavy-ion collisions and magnetar crusts, during Type II supernova explosions and neutron star mergers are analyzed.
V.N. Kondratyev
doaj +1 more source
Nucleosynthesis in Novae [PDF]
Proceedings of the 14th International Symposium on Nuclei in the Cosmos (NIC2016), 2017 Peer ...
openaire +3 more sources
s-Processing in Asymptotic Giant Branch Stars in the Light of Revised Neutron-Capture Cross Sections
Universe, 2021 Current AGB stellar models provide an adequate description of the s-process nucleosynthesis that occurs. Nonetheless, they still suffer from many uncertainties related to the modeling of the 13C pocket formation and the adopted nuclear reaction rates ...
Diego Vescovi, René Reifarth
doaj +1 more source
QUÍMICA ESTELAR E ESTRELAS APOCALÍPTICAS: ESTUDO COMPARATIVO
Colloquium Exactarum, 2012 All atoms existing in the Universe, except Hydrogen (H) and helium (He), arise from processes occurring in stars and their evolution. The stars transmute the H and He in other heavier elements through nuclear fusion and its process rolling, filling and ...
Nikele Milani +3 more
doaj +1 more source
R-Process with Magnetized Nuclei at Dynamo-Explosive Supernovae and Neutron Star Mergers
Universe, 2021 Nucleosynthesis at latge magnetic induction levels relevant to core-collapse supernovae and neutron star mergers is considered. For respective magnetic fields of a strength up to ten teratesla, atomic nuclei exhibit a linear magnetic response due to the ...
Vladimir N. Kondratyev
doaj +1 more source