scholarly journals REALISTIC CYCLIC MAGNETIC UNIVERSE

2012 ◽  
Vol 21 (09) ◽  
pp. 1250073 ◽  
Author(s):  
L. G. MEDEIROS
Keyword(s):  
Magnetic Field ◽  
Big Bang ◽  
Nonlinear Electrodynamics ◽  
Baryonic Matter ◽  
Big Rip ◽  
Cosmological Scenario ◽  
Free Parameters ◽  
Big Bang Model ◽  
Theoretical Considerations ◽  
The Magnetic Field

This work presents a complete cyclic cosmological scenario based on nonlinear magnetic field. It is constructed from a model composed of five fluids, namely baryonic matter, dark matter, radiation, neutrinos and a cosmological magnetic field. The first four fluids are treated in the standard way and the fifth fluid, the magnetic field, is described by a nonlinear electrodynamics. The free parameters are fitted by observational data (SNIa, CMB, extragalactic magnetic fields, etc.) and by simple theoretical considerations. As a result arises a cyclic cosmological model that preserves the main successes of the standard Big Bang model and solves some other problems such as the initial singularity, the present acceleration and the Big Rip.

Mathematical modeling of the nonlinear electrodynamics effect of signal delay in the magnetic field of pulsars

2015 ◽  
Vol 55 (11) ◽  
pp. 1857-1866 ◽  
Author(s):  
M. G. Gapochka ◽  
M. M. Denisov ◽  
I. P. Denisova ◽  
N. V. Kalenova ◽  
A. F. Korolev
Keyword(s):  
Mathematical Modeling ◽  
Magnetic Field ◽  
Nonlinear Electrodynamics ◽  
Signal Delay ◽  
The Magnetic Field

scholarly journals Big bounce with finite-time singularity: The F(R) gravity description

2017 ◽  
Vol 26 (08) ◽  
pp. 1750085 ◽  
Author(s):  
S. D. Odintsov ◽  
V. K. Oikonomou
Keyword(s):  
Big Bang ◽  
Einstein Frame ◽  
Jordan Frame ◽  
Cosmological Perturbations ◽  
Scale Invariant ◽  
Type Iv ◽  
Big Rip ◽  
Cosmological Scenario ◽  
The Big Bang ◽  
Big Bounce

An alternative to the Big Bang cosmologies is obtained by the Big Bounce cosmologies. In this paper, we study a bounce cosmology with a Type IV singularity occurring at the bouncing point in the context of [Formula: see text] modified gravity. We investigate the evolution of the Hubble radius and we examine the issue of primordial cosmological perturbations in detail. As we demonstrate, for the singular bounce, the primordial perturbations originating from the cosmological era near the bounce do not produce a scale-invariant spectrum and also the short wavelength modes after these exit the horizon, do not freeze, but grow linearly with time. After presenting the cosmological perturbations study, we discuss the viability of the singular bounce model, and our results indicate that the singular bounce must be combined with another cosmological scenario, or should be modified appropriately, in order that it leads to a viable cosmology. The study of the slow-roll parameters leads to the same result indicating that the singular bounce theory is unstable at the singularity point for certain values of the parameters. We also conformally transform the Jordan frame singular bounce, and as we demonstrate, the Einstein frame metric leads to a Big Rip singularity. Therefore, the Type IV singularity in the Jordan frame becomes a Big Rip singularity in the Einstein frame. Finally, we briefly study a generalized singular cosmological model, which contains two Type IV singularities, with quite appealing features.

scholarly journals CYCLIC MAGNETIC UNIVERSE

2009 ◽  
Vol 24 (30) ◽  
pp. 5639-5658 ◽  
Author(s):  
M. NOVELLO ◽  
ALINE N. ARAUJO ◽  
J. M. SALIM
Keyword(s):  
Magnetic Field ◽  
Present Model ◽  
Nonlinear Electrodynamics ◽  
Acceleration Phase ◽  
Maxwell Theory ◽  
Cosmological Scenario ◽  
One Step ◽  
The Universe ◽  
Friedmann Robertson Walker ◽  
Main Factor

Recent works have shown the important role nonlinear electrodynamics (NLED) can have in two crucial questions of cosmology, concerning particular moments of its evolution for very large and for low-curvature regimes, that is for very condensed phase and at the present period of acceleration. We present here a toy model of a complete cosmological scenario in which the main factor responsible for the geometry is a nonlinear magnetic field which produces a Friedmann–Robertson–Walker homogeneous and isotropic geometry. In this scenario we distinguish four distinct phases: a bouncing period, a radiation era, an acceleration era, and a re-bouncing period. It has already been shown that in NLED a strong magnetic field can overcome the inevitability of a singular region typical of linear Maxwell theory; on the other extreme situation, that is for very weak magnetic field it can accelerate the expansion. The present model goes one step further: after the acceleration phase the universe re-bounces and enters into a collapse era. This behavior is a manifestation of the invariance under the dual map of the scale factor a(t) → 1/a(t), a consequence of the corresponding inverse symmetry of the electromagnetic field (F → 1/F, where F ≡ FμνFμν) of the NLED theory presented here. Such sequence collapse–bouncing–expansion–acceleration–re-bouncing–collapse constitutes a basic unitary element for the structure of the universe that can be repeated indefinitely yielding what we call a cyclic magnetic universe.

scholarly journals Observational Tests of Baryon Symmetric Cosmology

1983 ◽  
Vol 104 ◽  
pp. 437-445
Author(s):  
F. W. Stecker
Keyword(s):  
Big Bang ◽  
Blackbody Radiation ◽  
Baryon Asymmetry ◽  
Observational Constraints ◽  
Baryonic Matter ◽  
Grand Unified Theories ◽  
Unified Theories ◽  
Important Amount ◽  
Big Bang Model ◽  
The Universe

To the gods alone belongs it never to be old or die. But all things else melt with all-powerful time….SophoclesWith the advent of grand unified theories (GUTs) has come the concept (among others) that baryons (protons, etc.) can decay by changing into leptons (“Diamonds are not forever.”) and vice versa, baryonic matter can be created from the thermal blackbody radiation in the early universe (provided, of course, that the hot big-bang model is basically correct). Using this concept, models have been suggested to generate a universal baryon asymmetry, with the consequence that no important amount of antimatter would be left in the universe at the present time (see, e.g. Langacker 1981 and references therein). These models have been motivated by observational constraints on antimatter, at least in our little corner of the universe (Steigman 1976). However, some of these constraints have been shown to be overrestrlctive (Stecker 1978, Allen 1981) and an alternative model, also based on GUTs, has been suggested which maintains matter-antimatter (I.e., baryon) symmetry on a universal scale, but results in separate “fossil domains” of clusters of matter galaxies and clusters of antimatter galaxies.

scholarly journals The Electrical Magnetism of Maxwell (1873) Is the “Crooked Mirror” of Physical Science

2019 ◽  
Vol 11 (3) ◽  
pp. 49
Author(s):  
Robert A. Sizov
Keyword(s):  
Magnetic Field ◽  
Physical Science ◽  
Dimensional Space ◽  
Big Bang ◽  
Nuclear Forces ◽  
Ultimate Truth ◽  
Great Physicist ◽  
Dimensional Space Time ◽  
Magnetic Poles ◽  
The Magnetic Field

The concept of the electric magnetism Maxwell (1873) is a result of the superficial and exceptionally erroneous impression of Great Physicist from the well-known experience of Oersted. However the world scientific community adopted this erroneous impression as the ultimate truth and, following Maxwell, declared the moving electric charges to be direct sources of the magnetic field. At same time, the true sources of the magnetic field the magnetic poles (magnetic charges) which are the real structural components of atoms and substance, were “buried alive”. Such theoretical discoveries as the curvature of four-dimensional space-time, explaining the physics of gravity, the big bang, the journey through “Black holes” in space and time, and many others, are well known. All these discoveries were formed without taking into account the existence of real magnetic poles (magnetic charges) since were based on the provisions of Maxwell’s flawed electromagnetic concept. The main reason which for more than 100 years inhibits the detection and recognition of real magnetic charges, are the special conditions of their confinement in a substance that are radically in the substance different from confinement of electrons. The results the experiments of F. Ehrenhaft, the present author and others in which of real magnetic charges were observed in the structures of atoms and substance prove that the existing concept of electric magnetism is deeply erroneous, and the fundamental change in physical priorities is the most important task today. Physical science, freed from vicious EM-concept of Maxwell and the accompanying relativism will offer humanity innovations in the form of practically useful physical effects and manifestations. This article presents 11 such innovations discovered by the author when embedded into the representations of real magnetic charges including, example, the electromagnetic (vortex) nature of the gravitational field, as well as the effects of Gravitational levitation and Intra-atomic gravitational shielding (IAGS). The first effect allows, for example, a person to go out into space without the use of jet thrust. The IAGS effect largely determines the physics of such fundamental manifestations as the chemical bonding, nuclear forces, and radioactivity.

scholarly journals Coronal Loop Mapping to Infer the Best Magnetic Field Models for Active Region Prominences

2013 ◽  
Vol 8 (S300) ◽  
pp. 416-417
Author(s):  
G. Allen Gary ◽  
Qiang Hu ◽  
Jong Kwan Lee
Keyword(s):  
Magnetic Field ◽  
Coronal Loop ◽  
Field Model ◽  
Three Dimensional ◽  
Coronal Loops ◽  
Magnetic Field Model ◽  
Free Parameters ◽  
Field Lines ◽  
Fitness Parameter ◽  
The Magnetic Field

AbstractThis article comments on the results of a new, rapid, and flexible manual method to map on-disk individual coronal loops of a two-dimensional EUV image into the three-dimensional coronal loops. The method by Gary, Hu, and Lee (2013) employs cubic Bézier splines to map coronal loops using only four free parameters per loop. A set of 2D splines for coronal loops is transformed to the best 3D pseudo-magnetic field lines for a particular coronal model. The results restrict the magnetic field models derived from extrapolations of magnetograms to those admissible and inadmissible via a fitness parameter. This method uses the minimization of the misalignment angles between the magnetic field model and the best set of 3D field lines that match a set of closed coronal loops. We comment on the implication of the fitness parameter in connection with the magnetic free energy and comment on extensions of our earlier work by considering the issues of employing open coronal loops or employing partial coronal loop.

Diagnosis of Supporting Structures of HV Lines Using Magneto-Mechanical Effects

2013 ◽  
Vol 208 ◽  
pp. 70-85 ◽  
Author(s):  
Marek Iwaniec ◽  
Miroslaw Witoś ◽  
Maciej Roskosz ◽  
Szymon Gontarz
Keyword(s):  
Magnetic Field ◽  
Reference Signal ◽  
Magnetic Memory ◽  
Mechanical Effects ◽  
It Support ◽  
The Subject ◽  
Level Of Effort ◽  
Theoretical Considerations ◽  
The Magnetic Field ◽  
Supporting Structures

This paper concerns the idea of using magneto-mechanical effects in prophylactic activities to reduce the risk of occurrence of an extensive blackout on high voltage (HV) lines. The subject matter of the paper is related to the event from April 8, 2008, which deprived approximately 600,000 recipients from 18 cities of the West Pomeranian voivodeship of power and caused millions in losses for the national economy. In theoretical considerations, the idea of diagnosing the technical state and level of effort of steel power line towers using the metal magnetic memory method (MMM) is presented, with a consideration of the methodology for obtaining a reference signal from the external magnetic field. The capabilities of the MMM method have been illustrated by examples of active and passive experiments. Finally, the authors indicated the need of IT support of MMM data analysis using a 3D model of the predicted distribution of the magnetic field in the vicinity of the tested object.

scholarly journals Primordial Nucleosynthesis with a background magnetic field

2020 ◽  
Vol 227 ◽  
pp. 02003
Author(s):  
Yudong Luo ◽  
Toshitaka Kajino ◽  
Motohiko Kusakabe ◽  
Michael A Famiano
Keyword(s):  
Magnetic Field ◽  
Early Universe ◽  
Big Bang ◽  
Detailed Calculation ◽  
Big Bang Nucleosynthesis ◽  
Capture Reaction ◽  
Primordial Nucleosynthesis ◽  
Electron Positron ◽  
Background Magnetic Field ◽  
The Magnetic Field

We present our recent detailed calculation of the impacts from a background magnetic field on Big Bang Nucleosynthesis (BBN). Namely, the magnetic field impacts on the electron-positron thermodynamics, time temper-ature relation and the screening potential of the early Universe. Most interest-ingly, we investigated the electron-positron relativistic screening potential with the background magnetic field, such potential might lead to a non trivial effect on the electron capture reaction which could finally affect the neutron to proton ratio.

Exciton Magnetoluminescence Studies in Ordered and Disordered In0.48Ga0.52P Semiconductor Alloys

1992 ◽  
Vol 281 ◽  
Author(s):  
E. D. Jones ◽  
D. M. Follstaedt ◽  
S. K. Lyo ◽  
R. P. Schneider
Keyword(s):  
Magnetic Field ◽  
Disordered Alloys ◽  
Transmission Electron ◽  
Peak Energy ◽  
Ordered Alloys ◽  
Field Dependent ◽  
Theoretical Considerations ◽  
Lattice Matched ◽  
The Magnetic Field ◽  
Good Agreement

ABSTRACTWe report the observation of magnetic-field dependent excitonic photoluminescence energies and linewidths in ordered and disordered In0.48Ga0.52P alloys (lattice matched to GaAs). The photoluminescence measurements were made at 1.4 K and the applied magnetic field ranged between 0 and 13.6 tesla. With increasing magnetic fields, we observe increasing photoluminescence linewidths for disordered alloys and decreasing photoluminescence linewidths for the ordered alloys. The magnetic field dependence of the photoluminescence peak-energy shifts for all samples (ordered and disordered) is in good agreement with theoretical considerations. The presence of CuPt-type ordering was confirmed by transmission electron microscopy.

scholarly journals Maser polarization and magnetic fields

2012 ◽  
Vol 8 (S287) ◽  
pp. 31-40 ◽  
Author(s):  
W. H. T. Vlemmings
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Supernova Remnants ◽  
Silicon Monoxide ◽  
Star Forming ◽  
Physical Conditions ◽  
Star Forming Regions ◽  
Theoretical Considerations ◽  
The Magnetic Field

AbstractMaser polarization observations can reveal unique information on the magnetic field strength and structure for a large number of very different astronomical objects. As the different masers for which polarization is measured, such as silicon-monoxide, water, hydroxil and methanol, probe different physical conditions, the masers can even be used to determine for example the relation between magnetic field and density. In particular, maser polarization observations have improved our understanding of the magnetic field strength in, among others, the envelopes around evolved stars, Planetary Nebulae (PNe), massive star forming regions, supernova remnants and megamaser galaxies. This review presents an overview of maser polarization observations and magnetic field determinations of the last several years and discusses some of the theoretical considerations needed for a proper maser polarization analysis.

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