Zobrazeno 1 - 10
of 18
pro vyhledávání: '"K. A. K. Gadallah"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 519:861-870
For spiral galaxies, the active galactic nucleus (AGN) and some physical parameters that concern the host galaxy such as spiral arm radius and density can play an important role in the morphological evolution of these galaxies. Considering the gravit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89d2c3402c4d791e2c8dc5886419fb87
https://doi.org/10.1093/mnras/stac3602
https://doi.org/10.1093/mnras/stac3602
Autor:
Abdallah A.M. Ali, K. A. K. Gadallah
Publikováno v:
Advances in Space Research. 67:4222-4237
Interstellar dust grains are illuminated in the reflection nebulae. Under conditions of the PAH size and the intensity of the interstellar radiation field, we follow their impact on the PAH aromatic infrared bands using the numerical DustEM code. For
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1baa224f3943c2bfd1c4a55b88e4015
https://doi.org/10.1016/j.asr.2021.02.025
https://doi.org/10.1016/j.asr.2021.02.025
Publikováno v:
Applied Mathematics and Nonlinear Sciences. 5:157-176
In this paper, we present a comprehensive analytical study on the perturbed restricted three bodies problem. We formulate the equations of motion of this problem, in the event of the asteroids belt perturbation. We find the locations of equilibrium p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35e9866742f19b1db71399ac1b86be91
https://doi.org/10.2478/amns.2020.2.00022
https://doi.org/10.2478/amns.2020.2.00022
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 494 (3), pp.4119-4129. ⟨10.1093/mnras/staa862⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 494 (3), pp.4119-4129. ⟨10.1093/mnras/staa862⟩
Sticking of gas-phase methanol on different cold surfaces – gold, 13CO, and amorphous solid water (ASW) ice – was studied as a function of surface temperature (7–40 K). In an ultrahigh-vacuum system, reflection absorption infrared spectroscopy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::800ae938136892656dcfd55324367dc8
https://hal.archives-ouvertes.fr/hal-03134546/file/Sticking_of_methanol_LERMA-Cergy_2020.pdf
https://hal.archives-ouvertes.fr/hal-03134546/file/Sticking_of_methanol_LERMA-Cergy_2020.pdf
Autor:
M.S. Abolazm, M.S. Al-Gazzar, K. A. K. Gadallah, S. M. Saad, A. Shokry, M.H. El-Depsey, M.M. Beheary, M. A. Hamdy
Publikováno v:
New Astronomy. 59:8-13
A new photometric study of two eclipsing binary systems (GU CMa and SWASP J011732.10+525204.9) is presented. The accepted solutions of analyzing the light curves revealed that GU CMa is a semi-detached system consisting of two early spectral type com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b1d7865f0ecc01a3ac4d703d9677d51
https://doi.org/10.1016/j.newast.2017.08.005
https://doi.org/10.1016/j.newast.2017.08.005
Publikováno v:
New Astronomy. 52:122-132
We report the results of spectral and photometric observations of SU UMa. Available spectra from International Ultraviolet Explorer (IUE) and CCD photometry of five nights were used. Some profiles revealing the variations of some spectral lines at di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae5bdc1060a684e1349376e1a548ba1b
https://doi.org/10.1016/j.newast.2016.10.010
https://doi.org/10.1016/j.newast.2016.10.010
Publikováno v:
Applied Mathematics and Nonlinear Sciences. 2:181-194
We report the results of spectral and photometric observations of DQ Her. Available spectra from International Ultraviolet Explorer (IUE), Hubble Space Telescope Faint Object Spectrograph (HST - FOS) and CCD photometry of one night were used. Some pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55076b0ff74dc7699d37bd45f4a81ef9
https://doi.org/10.21042/amns.2017.1.00015
https://doi.org/10.21042/amns.2017.1.00015
Autor:
Mohamed I. Nouh, I. Zaid, M.S. Darwish, M. A. Hamdy, S. M. Saad, M. M. Elkhateeb, K. A. K. Gadallah, M.M. Beheary
Publikováno v:
New Astronomy. 50:37-42
We present an orbital solution study for the newly discovered system 1SWASP J080150.03+471433.8 by means of new CCD observations in VRI bands. Our observations were carried out on 25 Feb. 2013 using the Kottamia optical telescope at NRIAG, Egypt. 12
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba27ab10469843dfd9d5c328e5a6097d
https://doi.org/10.1016/j.newast.2016.07.007
https://doi.org/10.1016/j.newast.2016.07.007
Autor:
M.S. Darwish, M.M. Beheary, M. A. Hanna, A. Shokry, M.A. Nasser, K. A. K. Gadallah, M. A. Hamdy, M.S. Saad
Publikováno v:
New Astronomy. 50:12-18
We present a new set of CCD photometric observations for the short period eclipsing binary 1SWASP J1743 (= V1067 Her). We have determined the available times of light minima and two new linear and quadratic ephemerides have been obtained. The photome
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef4feb4606068a2246f7686389c89aaa
https://doi.org/10.1016/j.newast.2016.06.005
https://doi.org/10.1016/j.newast.2016.06.005
Autor:
M. A. Hamdy, K. A. K. Gadallah, M.A. Nasser, M.M. Beheary, D.A. Fouda, M.S. Saad, M.S. Darwish
Publikováno v:
New Astronomy. 47:24-28
We present the first light curve analysis of the new eclipsing binary of WUMa type 1SWASP J2104. A detailed photometric analysis was carried out in VRI bands using the most recent version of Wilson–Devinney (WD) code. The absolute physical paramete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b344fdafb6c11afd5cb0c95eda9fb4f
https://doi.org/10.1016/j.newast.2016.02.001
https://doi.org/10.1016/j.newast.2016.02.001