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We observe photons and neutrinos from stars. Based on these observations, complemented by measurements of cosmic rays energies and composition, we have been able to constrain several models for the Big Bang and for stellar evolution. But…

Nuclear Theory · Physics 2011-10-13 C. A. Bertulani

We discuss the possibility whether superheavy elements can be produced in Nature by the astrophysical rapid neutron capture process. To this end we have performed fully dynamical network r-process calculations assuming an environment with…

RNAnet provides a bridge between two widely used Human gene databases. Ensembl describes DNA sequences and transcripts but not experimental gene expression. Whilst NCBI's GEO contains actual expression levels from Human samples. RNAnet…

Molecular Networks · Quantitative Biology 2010-01-26 W. B. Langdon , Olivia Sanchez Graillet , A. P. Harrison

The simulation of heavy element nucleosynthesis requires input from yet-to-be-measured nuclear properties. The uncertainty in the values of these off-stability nuclear properties propagates to uncertainties in the predictions of elemental…

High Energy Astrophysical Phenomena · Physics 2024-04-08 M. R. Mumpower , T. M. Sprouse , J. M. Miller , K. A. Lund , J. Cabrera Garcia , N. Vassh , G. C. McLaughlin , R. Surman

About half of the heavy elements in the Solar System were created by rapid neutron capture, or r-process, nucleosynthesis. In the r-process, heavy elements are built up via a sequence of neutron captures and beta decays in which an intense…

Nuclear Theory · Physics 2017-08-23 R. Surman , M. Mumpower , J. Cass , A. Aprahamian

Deep learning is a potential approach to automatically develop kinetic models from experimental data. We propose a deep neural network model of KiNet to represent chemical kinetics. KiNet takes the current composition states and predicts…

Computational Physics · Physics 2021-08-03 Weiqi Ji , Sili Deng

Neutron star (NS) mergers are known to produce heavy elements through rapid neutron capture (r-process) nucleosynthesis. Actinides are expected to be created solely by the r-process in the most neutron rich environments. Confirming if NS…

High Energy Astrophysical Phenomena · Physics 2025-01-07 Quentin Pognan , Meng-Ru Wu , Gabriel Martínez-Pinedo , Ricardo Ferreira da Silva , Anders Jerkstrand , Jon Grumer , Andreas Flörs

Recent spectroscopic measurements in open clusters younger than the Sun, with [Fe/H]>=0, showed that the abundances of neutron-rich elements have continued to increase in the Galaxy after the formation of the Sun, roughly maintaining a…

Solar and Stellar Astrophysics · Physics 2015-06-03 Enrico Maiorca , Laura Magrini , Maurizio Busso , Sofia Randich , Sara Palmerini , Oscar Trippella

The existence of nuclei with exotic combinations of protons and neutrons provides fundamental information on the forces acting between nucleons. The maximum number of neutrons a given number of protons can bind, neutron drip line1, is only…

In this review, we emphasize the interplay between astrophysical observations, modeling, and nuclear physics laboratory experiments. Several important nuclear cross sections for astrophysics have long been identified e.g.…

Nuclear Experiment · Physics 2016-05-26 Alain Coc , Fairouz Hammache , Juergen Kiener

In this paper, we propose a new method to identify biochemical reaction networks (i.e. both reactions and kinetic parameters) from heterogeneous datasets. Such datasets can contain (a) data from several replicates of an experiment performed…

Systems and Control · Computer Science 2015-09-21 Wei Pan , Ye Yuan , Lennart Ljung , Jorge Goncalves , Guy-Bart Stan

Theoretical physical-chemical models for the formation of planetary systems depend on data quality for the Sun's composition, that of stars in the solar neighbourhood, and of the estimated "pristine" compositions for stellar systems. The…

We present a new energy transport code that models the time dependent and non-linear evolution of spectra of cosmic-ray nuclei, their secondaries, and photon target fields. The software can inject an arbitrary chemical composition including…

High Energy Astrophysical Phenomena · Physics 2023-08-21 Lukas Merten , Paolo Da Vela , Anita Reimer , Margot Boughelilba , Jon Paul Lundquist , Serguei Vorobiov , Julia Becker Tjus

Bulk meteorites and their inclusions exhibit, for many chemical elements, isotopic variability produced by nucleosynthetic events in stars and supernovae before the formation of the Sun. While the exact astrophysical origins of these…

The existence of neutron star mergers has been supported since the discovery of the binary pulsar and the observation of its orbital energy loss, consistent with General Relativity. They are considered nucleosynthesis sites of the rapid…

High Energy Astrophysical Phenomena · Physics 2017-10-09 F. -K. Thielemann , M. Eichler , I. V. Panov , B. Wehmeyer

The astrophysical p process, which is responsible for the origin of the proton rich stable nuclei heavier than iron, was investigated using a full nuclear reaction network for a type II supernova explosion when the shock front passes…

Astrophysics · Physics 2008-11-26 W. Rapp , J. Goerres , M. Wiescher , H. Schatz , F. Kaeppeler

Primordial or Big Bang nucleosynthesis (BBN) is one of the three strong evidences for the Big- Bang model together with the expansion of the Universe and the Cosmic Microwave Background radiation. In this study, we improve the standard BBN…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Alain Coc , Stephane Goriely , Yi Xu , Matthias Saimpert , Elisabeth Vangioni

Neutrinos are known to play important roles in many astrophysical scenarios from the early period of the big bang to current stellar evolution being a unique messenger of the fusion reactions occurring in the center of our sun. In…

High Energy Astrophysical Phenomena · Physics 2024-03-05 Tobias Fischer , Gang Guo , Karlheinz Langanke , Gabriel Martinez-Pinedo , Yong-Zhong Qian , Meng-Ru Wu

The quest for the origin of the chemical elements, which we find in our body, in our planet (Earth), in our star (Sun), or in our galaxy (Milky Way) could only be resolved with a thorough understanding of the nuclear physics properties of…

Nuclear Experiment · Physics 2018-03-26 René Reifarth , David Brown , Saed Dababneh , Yuri A. Litvinov , Shea M. Mosby

The capability of multi-input field-to-field regression, i.e. mapping the initial field and applied conditions to the evolved field, is appealing, enabling ultra-fast physics-free simulation of various field evolvements across many…

Computational Engineering, Finance, and Science · Computer Science 2020-12-22 Zhuo Wang , Xiao Wang , Wenhua Yang , Yaohong Xiao , Yucheng Liu , Lei Chen
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