5 papers
The solar nitrogen abundance under the LTE assumption
Sameh I. S, M. M. Beheary, Abdelrazek M. K. Shaltout
The solar chemical abundances studied in considerable detail because of discrepant values of solar metallicity inferred from different indicators, where in the present work we have…
Estimating the coronal and chromospheric magnetic fields of solar active regions as observed with the Nobeyama Radioheliograph Compared with the Extrapolated Linear Force-Free Field
A. Mouner, Abdelrazek M. K. Shaltout, M. M. Beheary +2
Adopting the thermal free-free emission mechanism, the coronal and chromospheric magnetic fields are derived from the polarization and spectral observations with the Nobeyama Radio…
Inference of chromospheric magnetic fields in a sunspot derived from spectropolarimetry of Ca II 8542 A
Ali G. A. Abdelkawy, Abdelrazek M. K. Shaltout, M. M. Beheary +1
We analyze spectropolarimetric observations of the chromospheric Ca II 8542 A line taken by the Interferometric Bidimensional Spectrometer (IBIS) at the Dunn Solar Telescope. The d…
The chromospheric magnetic field in active regions derived from spectropolarimetry of Ca II 8542
Ali G. A. Abdelkawy, Abdelrazek M. K. Shaltout, M. M. Beheary
We analyze spectropolarimetric observations of the chromospheric Ca II 8542 line taken by the Interferometric Bidimensional Spectrometer (IBIS) at the Dunn Solar Telescope and phot…
The LTE solar abundance of neodymium
A. G. A. Abdelkawy, Abdelrazek M. K. Shaltout, M. M. Beheary +1
We study the solar photospheric abundance of singly ionized neodymium (Nd II) using high resolution spectroscopic data obtained by Fourier transform spectrograph (FTS). Based on th…