The Dynamics of the Neutron Complexes: From Neutron Star to Black Hole
Issue:
Volume 7, Issue 4, August 2019
Pages:
36-40
Received:
27 June 2019
Accepted:
28 September 2019
Published:
11 October 2019
Abstract: The mechanism of the appearance of neutron complexes, which at the final stage of their development, evolve into neutron stars, is described. It is shown that for a quantitative description it is necessary to use a generalization of the Newton-Schrödinger equations taking into account the next terms in the decomposition of explicit Dirac – Maxwell equations on c-2. In this approximation, the problem is described by the well-known Gross-Pitaevskii equation, the numerical analysis of which is performed for the spherically symmetric case. The result depends on the value of the parameter α equal to the ratio of the gravitational radius of the neutron complex to twice the Compton wavelength. For small values of α <0.5, the solutions describe a neutron star; for α > 0.5, the description corresponds to its gravitational collapse. This is consistent with the analysis of the general 3-dimensional case.
Abstract: The mechanism of the appearance of neutron complexes, which at the final stage of their development, evolve into neutron stars, is described. It is shown that for a quantitative description it is necessary to use a generalization of the Newton-Schrödinger equations taking into account the next terms in the decomposition of explicit Dirac – Maxwell ...
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Comparison of Global Vertical Total Electron Content from Various Global Data Centers
Shambel Gizachew,
Belay Sitotaw,
Gizaw Mengistu Tsidu
Issue:
Volume 7, Issue 4, August 2019
Pages:
41-48
Received:
26 March 2019
Accepted:
26 April 2019
Published:
23 October 2019
Abstract: In this study, the inter-comparison of various global vertical total electron contents are derived from Global Positioning System (GPS) networks worldwide. Based on observation data obtained from global network of dual frequency, the ionospheric variability on one full year, 2008 is studied through the vertical electron conten distribution GPS. The comparisons are aimed at comparability of the different vertical total electron content data sets in terms of absolute magnitude, capturing diurnal, seasonal variability globally. Total electron content (TEC) values were compared by computing the TEC differences among different stations. Most of the data sets exhibit expected diurnal variability with some differences on the absolute magnitude of vertical total electron content moreover, seasonally, the variability is also comparable. In this observation, highest vertical electron contents are observed on the Jet prolusion laboratory. It is followed by International global service, vertical total electron content and the least is observed on the Polytechnical University data sets.
Abstract: In this study, the inter-comparison of various global vertical total electron contents are derived from Global Positioning System (GPS) networks worldwide. Based on observation data obtained from global network of dual frequency, the ionospheric variability on one full year, 2008 is studied through the vertical electron conten distribution GPS. The...
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