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Electron-Positron Pairs Related to Alfven Waves on the Magnetar Surface
Abdul Kader,
Kalpana Duorah
Issue:
Volume 3, Issue 3, June 2015
Pages:
25-29
Received:
Apr. 08, 2015
Accepted:
Apr. 23, 2015
Published:
May 06, 2015
Abstract: The phenomena of electron-positron pairs production through the polar cap region of a magnetar is studied. Assuming the distances of electron-positron pair regions from the magnetar centre to be the height scales of magnetic deformed regions and hence determine by adopting the Alfven waves propagation. The maximum potential drop on the magnetar surface and the potential differences in the confined regions are obtained by using Lorentz factor. The attempt is made to find out the curvature photon energy through the polar cap region of magnetar that is greater than critical energy and verify the conversion into electron-positron pairs via synchrotron radiation with their characteristic photon energy. Further, an estimate is made to flow the charged particles per second through the polar cap region.
Abstract: The phenomena of electron-positron pairs production through the polar cap region of a magnetar is studied. Assuming the distances of electron-positron pair regions from the magnetar centre to be the height scales of magnetic deformed regions and hence determine by adopting the Alfven waves propagation. The maximum potential drop on the magnetar sur...
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Day-to-Day Variability of Low Latitude F-Region Ionosphere During Low Solar Activity
Anju Nagar,
Satyadeo Mishra,
Surendra Kumar Vijay
Issue:
Volume 3, Issue 3, June 2015
Pages:
30-41
Received:
Jan. 30, 2015
Accepted:
Apr. 14, 2015
Published:
May 07, 2015
Abstract: This paper presents an analysis of the F-region variability of the ionospheric parameters [foF2and M(3000)F2] at three low latitude stations during low solar activity periods from January 2006 to December 2010. The diurnal, seasonal and day-to-day characteristics of theseionospheric F-region parameters have been studied in detail. With the use of partial correlation analysis we have computed the correlation between the variation of these parameters and other factors such as the solar radio flux 10.7cm (F10.7)and the geomagnetic AP index. It has been observed that the magnitude of the variability of propagation parameter M(3000)F2aresmoother and smaller than in that case of foF2. It is also observed that for both parameters there are no remarkable changes in day-to-day variability with geomagnetic activity during low solar activity.
Abstract: This paper presents an analysis of the F-region variability of the ionospheric parameters [foF2and M(3000)F2] at three low latitude stations during low solar activity periods from January 2006 to December 2010. The diurnal, seasonal and day-to-day characteristics of theseionospheric F-region parameters have been studied in detail. With the use of p...
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Dynamics of a Charged Scalar Field Thin Shell
Issue:
Volume 3, Issue 3, June 2015
Pages:
50-54
Received:
Apr. 23, 2015
Accepted:
May 06, 2015
Published:
May 15, 2015
Abstract: This paper deals with the motion of a charged spherically symmetric thin shell composed of a scalar field. The equations of motion resulting from the matching conditions of the two surrounding spacetimes which are described by the Reissner Nordstrom metric are derived. I evaluate the case of massless scalar field, where the scalar field potential is zero, also I evaluate the case of massive scalar field.
Abstract: This paper deals with the motion of a charged spherically symmetric thin shell composed of a scalar field. The equations of motion resulting from the matching conditions of the two surrounding spacetimes which are described by the Reissner Nordstrom metric are derived. I evaluate the case of massless scalar field, where the scalar field potential i...
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