106 citations · 110 across the 4 of their papers we have counts for
4 papers
UBVRI night sky brightness at Kottamia Astronomical Observatory
Mohamed F. Aboushelib, Abdelfady B. Morcos, Samir Nawar +2
Photoelectric observations of night sky brightness (NSB) at different zenith distances and azimuths, covering all the sky, at the Egyptian Kottamia Astronomical observatory (KAO) s…
Characterising the high-mass star forming region IRAS 18144-1723 through methanol maser observations
Esraa Khafagy, khaled A. Edris, Osama M. Shalabiea +3
We introduce a study of the massive star forming region IRAS 18144--1723 using observations of the 6.7 GHz methanol maser line. Such regions are opaque at short wavelengths but can…
Deuterium Chemistry in the Young Massive Protostellar Core NGC 2264 CMM3
Z. Awad, O. M. Shalabiea
In this work we present the first attempt of modelling the deuterium chemistry in the massive young protostellar core NGC 2264 CMM3. We investigated the sensitivity of this chemist…
Deuterium fractionation on interstellar grains studied with modified rate equations and a Monte Carlo approach
Paola Caselli, Tatiana Stantcheva, Osama Shalabiea +2
The formation of singly and doubly deuterated isotopomers of formaldehyde and of singly, doubly, and multiply deuterated isotopomers of methanol on interstellar grain surfaces has…