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A host of dark energy models and non-standard cosmologies predict an enhanced Hubble rate in the early Universe: perfectly viable models, which satisfy Big Bang Nucleosynthesis (BBN), cosmic microwave background and general relativity…

High Energy Physics - Phenomenology · Physics 2009-11-11 M. Schelke , R. Catena , N. Fornengo , A. Masiero , M. Pietroni

We present results of cosmological N-body hydrodynamic chemistry simulations of primordial structure growth and evolution in a scenario with warm dark matter (WDM) having a mass of 3 keV (thermal relic) and compare with a model consisting…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-23 Umberto Maio , Matteo Viel

The properties of high energy density plasma are under increasing scrutiny in recent years due to their importance to our understanding of stellar interiors, the cores of giant planets$^{1}$, and the properties of hot plasma in inertial…

We explore the effects of magnetic energy dissipation on the formation of the first stars. For this purpose, we follow the evolution of primordial chemistry in the presence of magnetic fields in the post-recombination universe until the…

Cosmology and Nongalactic Astrophysics · Physics 2009-09-28 Dominik R. G. Schleicher , Daniele Galli , Simon C. O. Glover , Robi Banerjee , Francesco Palla , Raffaella Schneider , Ralf S. Klessen

In the context of the solar atmosphere, we re-examine the role of of neutral and ionized species in dissipating the ordered energy of intermediate-mode MHD waves into heat. We solve conservation equations for the hydrodynamics and for…

Solar and Stellar Astrophysics · Physics 2020-09-09 Philip G. Judge

The generation of large-scale magnetic fields is studied in dilaton electromagnetism in inflationary cosmology, taking into account the dilaton's evolution throughout inflation and reheating until it is stabilized with possible entropy…

Astrophysics · Physics 2008-11-26 Kazuharu Bamba , J. Yokoyama

While many-particle entanglement can be found in natural solids and strongly interacting atomic and molecular gases, generating highly entangled states between weakly interacting particles in a controlled and scalable way presents a…

Atomic Physics · Physics 2013-02-27 Felipe Herrera , Sabre Kais , K. Birgitta Whaley

Hot deformation process is one of the primary methods to produce anisotropic rare earth permanent magnets. Firstly, rapidly quenched powder flakes with nanocrystal structure are condensed into the full dense isotropic precursors by hot…

Materials Science · Physics 2018-12-05 Ren-Jie Chen , Ze-Xuan Wang , Xu Tang , Wen-Zong Yin , Chao-Xiang Jin , Jin-Yun Ju , A-Ru Yan

The primordial magnetic field (PMF) can strongly affect the cosmic microwave background (CMB) power spectrum and the formation of large scale structure. In this presentation, we calculate the CMB temperature anisotropies generated by…

Astrophysics · Physics 2008-11-26 Dai G. Yamazaki , Kiyotomo Ichiki , Toshitaka Kajino , Grant J. Mathews

We present an ab initio approach to the solar coronal heating problem by modelling a small part of the solar corona in a computational box using a 3D MHD code including realistic physics. The observed solar granular velocity pattern and its…

Astrophysics · Physics 2009-11-10 B. V. Gudiksen , Å. Nordlund

The heavy element content of giant exoplanets, inferred from structure models based on their radius and mass, often exceeds predictions based on classical core accretion. Pebble drift, coupled with volatile evaporation, has been proposed as…

Earth and Planetary Astrophysics · Physics 2026-01-28 Barry O'Donovan , Bertram Bitsch

Materials at high pressures and temperatures are of great interest for planetary science and astrophysics, warm dense matter physics, and inertial confinement fusion research. Planetary structure models rely on our understanding of the…

Earth and Planetary Astrophysics · Physics 2020-06-23 Ravit Helled , Guglielmo Mazzola , Ronald Redmer

Absorbtion of Alfven waves is considered to be the main mechanism of heating in the solar corona. It is concluded that the sharp increase of the plasma temperature by two orders of magnitude is related to a self-induced opacity with respect…

Astrophysics · Physics 2008-11-26 T. M. Mishonov , M. V. Stoev , Y. G. Maneva

Occasional energetic outbursts and anomalous X-ray luminosities are expected to be powered by the strong magnetic field in a neutron star. For a very strong magnetic field, elastic deformation becomes excessively large such that it leads to…

High Energy Astrophysical Phenomena · Physics 2023-04-12 Yasufumi Kojima , Shota Kisaka , Kotaro Fujisawa

The maximum temperature and radial temperature profile in a protoplanetary disc are important for the condensation of different elements in the disc. We simulate the evolution of a set of protoplanetary discs from the collapse of their…

Earth and Planetary Astrophysics · Physics 2022-01-19 Min Li , Shichun Huang , Zhaohuan Zhu , Michail I. Petaev , Jason H. Steffen

We report the results of our three-dimensional radiation hydrodynamics simulation of collapsing unmagnetized molecular cloud cores. We investigate the formation and evolution of the circumstellar disk and the clumps formed by disk…

Solar and Stellar Astrophysics · Physics 2015-06-16 Yusuke Tsukamoto , Masahiro N. Machida , Shuichiro Inutsuka

Parker has hypothesised that, in a perfectly ideal environment, complex photospheric motions acting on a continuous magnetic field will result in the formation of tangential discontinuities corresponding to singular currents. We review…

Solar and Stellar Astrophysics · Physics 2023-07-19 A. L. Wilmot-Smith

The Universe's early thermal history is poorly constrained, and it is possible that it underwent a period of early matter domination driven by a heavy particle or an oscillating scalar field that decayed into radiation before the onset of…

Cosmology and Nongalactic Astrophysics · Physics 2020-01-06 M. Sten Delos , Tim Linden , Adrienne L. Erickcek

Abridged: We study the properties of clumps formed in three-dimensional weakly magnetized magneto-hydrodynamic simulations of converging flows in the thermally bistable, warm neutral medium (WNM). We find that: (1) Similarly to the…

Astrophysics · Physics 2015-05-13 Robi Banerjee , Enrique Vazquez-Semadeni , Patrick Hennebelle , Ralf Klessen

Thermal conductivity of the most abundant element in the planetary core, Iron (Fe) is measured up to Earth's outer core pressure $\sim 120$ GPa. The measurements are carried out using the laser heated diamond anvil cell facility, where the…

Materials Science · Physics 2016-10-14 Pinku Saha , Goutam Dev Mukherjee
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