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We develop a model for explaining the data of Pierre Auger Observatory (Auger) for Ultra High Energy Cosmic Rays (UHECR), in particular, the mass composition being steadily heavier with increasing energy from 3 EeV to 35 EeV. The model is…

High Energy Astrophysical Phenomena · Physics 2013-06-11 R. Aloisio , V. Berezinsky , A. Gazizov

Screening mechanisms are often deployed by dark energy models in order to conceal the effects of their new degrees of freedom from the scrutiny of terrestrial and solar system experiments. However, extreme properties of nuclear matter may…

General Relativity and Quantum Cosmology · Physics 2021-12-08 Bernardo F. de Aguiar , Raissa F. P. Mendes , F. T. Falciano

The asymptotic behavior of the optical potential, describing elastic scattering of a charged particle $\alpha$ off a bound state of two charged, or one charged and one neutral, particles at small momentum transfer $\Delta_{\alpha}$ or…

Nuclear Theory · Physics 2009-10-28 E. O. Alt , A. M. Mukhamedzhanov

Mass segregation in star clusters is often thought to indicate the onset of energy equipartition, where the most massive stars impart kinetic energy to the lower-mass stars and brown dwarfs/free floating planets. The predicted net result of…

Astrophysics of Galaxies · Physics 2016-04-20 Richard J. Parker , Simon P. Goodwin , Nicholas J. Wright , Michael R. Meyer , Sascha P. Quanz

For a dense stellar matter, which is electrically neutral and in beta equilibrium, the electron chemical potential, mu_e, will depend nontrivially on baryonic matter density. It is generally expected that as density increases, the electron…

High Energy Astrophysical Phenomena · Physics 2009-09-09 Kyungmin Kim , Hyun Kyu Lee

It is the aim of this paper to discuss the impact of nuclear fusion on the EOS. This is a timely subject given the expected availability of increasingly exotic beams at rare isotope facilities\,\cite{balantekin2014}. In practice, we focus…

Nuclear Theory · Physics 2016-05-03 P. -G. Reinhard , A. S. Umar , P. D. Stevenson , J. Piekarewicz , V. E. Oberacker , J. A. Maruhn

We develop a series expansion of the plasma screening length away from the classical limit in powers of $\hbar^{2}$. It is shown that the leading order quantum correction increases the screening length in solar conditions by approximately…

Astrophysics · Physics 2008-11-26 Shirish M. Chitanvis

We present a method, based on the kinematic analysis of the Galactic disk stars, to clarify whether the internal motions of the stellar system in spiral arms follow those expected in the density wave theory. The method relies on the…

Astrophysics · Physics 2007-05-23 Taihei Yano , Masashi Chiba , Naoteru Gouda

Within the next decade, ground based gravitational wave detectors are in principle capable of determining the compact object merger rate per unit volume of the local universe to better than 20% with more than 30 detections. We argue that…

Astrophysics · Physics 2015-05-13 R. O'Shaughnessy , R. Kopparapu , K. Belczynski

Galaxy mergers can change the rate at which stars are formed. We can trace when these changes occur in simulations of galaxy mergers. However, for observed galaxies we do not know how the star formation rate (SFR) evolves along the merger…

Astrophysics of Galaxies · Physics 2026-01-14 W. J. Pearson , L. Wang , V. Rodriguez-Gomez , B. Margalef-Bentabol , L. E. Suelves

The decay of field-free rotational dynamics is experimentally studied in two complementary methods: laser-induced molecular alignment and terahertz-field-induced molecular orientation. Comparison between the decay rates of different…

Chemical Physics · Physics 2017-07-26 Ran Damari , Dina Kardash , Sharly Fleischer

Above-barrier fusion cross-sections for an isotopic chain of oxygen isotopes with A=16-19 incident on a $^{12}$C target are presented. Experimental data are compared with both static and dynamical microscopic calculations. These…

Nuclear Experiment · Physics 2020-07-01 S. Hudan , R. T. deSouza , A. S. Umar , Z. Lin , C. J. Horowitz

Context. The uncertainty in the degree to which radiation-driven winds of hot stars might be affected by small inhomogeneities in the density leads to a corresponding uncertainty in the determination of the atmospheric mass loss rates from…

Solar and Stellar Astrophysics · Physics 2013-07-12 C. B. Kaschinski , A. W. A. Pauldrach , T. L. Hoffmann

We explore the evolution of the cold gas and star-formation activity during galaxy interactions, using a merging galaxy sequence comprising both pre- and post-mergers. Data for this study come from the literature but supplemented by new…

Astrophysics · Physics 2015-06-24 Antonis Georgakakis , Duncan A. Forbes , Ray P. Norris

Thermonuclear fusion reaction rates in the solar plasma are enhanced by the presence of the electron cloud that screens fusing nuclei. The present work studies the influence of electron screening deformations on solar reaction rates in the…

Nuclear Theory · Physics 2009-11-06 Theodore E. Liolios

We investigate the possibility, in nuclear fragmentation, to extract information on nuclear density at break-up from fragment kinetic energy spectra using a simultaneous scenario for fragment emission. The conclusions we derive are…

Nuclear Theory · Physics 2009-11-11 Ad. R. Raduta , B. Borderie , E. Bonnet , N. Le Neindre , S. Piantelli , M. F. Rivet

We have investigated the effect of pressure from intracluster medium (ICM) on disk galaxies in merging clusters. The ram-pressure on the galaxies rapidly increases when two clusters collide. This leads to stripping of the interstellar…

Astrophysics · Physics 2015-06-24 Yutaka Fujita , Motokazu Takizawa , Masahiro Nagashima , Motohiro Enoki

We invoke star formation triggered by cloud-cloud collisions to explain global star formation rates of disk galaxies and circumnuclear starbursts. Previous theories based on the growth rate of gravitational perturbations ignore the…

Astrophysics · Physics 2009-10-31 Jonathan C. Tan

Abundance trends in heavier elements with evolutionary phase have been shown to exist in the globular cluster NGC 6752 [Fe/H]=-1.6. These trends are a result of atomic diffusion and additional (non-convective) mixing. Studying such trends…

Solar and Stellar Astrophysics · Physics 2014-09-05 Pieter Gruyters , Thomas Nordlander , Andreas J. Korn

F\"oldes and Pokol in their letter "Inertial fusion without compression does not work either with or without nanoplasmonics" criticized our works \cite{CS2015,CKP2018}. Here we refute their argumentation. Our proposed improvement is the…

Plasma Physics · Physics 2020-12-23 László P. Csernai , Norbert Kroó , István Papp , Daniel D. Strottman