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The connection between space weather and Single Event Upsets in polar low earth orbit satellites
Katz, Sari; Goldvais, Uriel; Price, Colin
Space weather is driven and modulated by the activity in the Sun. Space weather events have the potential to inflict critical damage to space systems. Nowadays, space assets are essential in our basic needs, such as communications, cell phone networks, navigation systems, television and internet. Hence, understanding space weather dynamics and its…
Ionic loss from Venus upper ionosphere via plasma wake
Moslem, W. M.; Elsheikh, I. A.; Tolba, R. E. +2 more
Recent observations have detected significant escape of ions from the Venusian ionosphere. The measurements indicate that the composition of the escaping mix of ions may reach a critical ratio of H+ : O+ ≈ 2 : 1 , suggesting that it originated in water molecules, in line with the observed dryness of the planet. In this work, …
Impacts of the PAH size and the radiation intensity on the IR features of illuminated dust within the reflection nebulae
Gadallah, Kamel A. K.; Ali, Abdallah A. M.
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 a dust model consisting of PAH, amorphous C and amorphous silicate, the PAH size varies in a range…
On the horizontal currents over the Martian magnetic cusp
Withers, Paul; Majeed, Tariq; AlMutawa, Shahd A. +4 more
Localized crustal magnetization over heavily cratered southern hemisphere at Mars gives rise to open magnetic field configurations which interact with the solar wind magnetic field to form magnetic cusp. The downward acceleration of energetic electrons in these cusps can produce aurora and an extended topside ionospheric structure over regions of …