Search Publications
Future Venus missions and flybys: A collection of possible measurements with mass spectrometers and plasma instruments
Wurz, P.; Galli, A.; Vorburger, A. +1 more
This study contains predictions for mass spectrometry and plasma instrument measurements during upcoming Venus flybys of BepiColombo and Solar Orbiter and discusses the possibility of a phosphine detection with mass spectrometry in Venus' upper atmosphere. The results extend the ones published previously in Gruchola et al. (2019), where prediction…
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 …
Hard X-ray cataclysmic variables
Mukai, K.; de Martino, D.; Masetti, N. +2 more
Among hard X-ray Galactic sources detected with the Swift and INTEGRAL surveys, those discovered as accreting white dwarf binaries have surprisingly boosted in number in the recent years. The majority are identified as magnetic Cataclysmic Variables of the Intermediate Polar type, suggesting this subclass as an important constituent of the Galacti…
Radio observations of magnetic cataclysmic variables
Mason, Paul A.; Singh, Kulinder P.; Barrett, Paul +2 more
The NSF's Karl G. Jansky Very Large Array (VLA) is used to observe 122 magnetic cataclysmic variables (MCVs) during three observing semesters (13B, 15A, and 18A). We report radio detections of 33 stars with fluxes in the range 6-8031 µJy. Twenty-eight stars are new radio sources, increasing the number of radio detected MCVs to more that 40. …
On a century of extragalactic novae and the rise of the rapid recurrent novae
Darnley, Matthew J.; Henze, Martin
Novae are the observable outcome of a transient thermonuclear runaway on the surface of an accreting white dwarf in a close binary system. Their high peak luminosity renders them visible in galaxies out beyond the distance of the Virgo Cluster. Over the past century, surveys of extragalactic novae, particularly within the nearby Andromeda Galaxy, …
Large non-radial propagation of a coronal mass ejection on 2011 January 24
Mierla, M.; D'Huys, E.; Stenborg, G. +6 more
Understanding the deflection of coronal mass ejections (CMEs) is of great interest to the space weather community because of their implications for improving the prediction of CME. This paper aims to shed light into the effects of the coronal magnetic field environment on CME trajectories. We analyze the influence of the magnetic environment on th…
Two successive partial mini-filament confined ejections
Mandrini, C. H.; Cristiani, G. D.; López Fuentes, M. +2 more
Active region (AR) NOAA 11476 produced a series of confined plasma ejections, mostly accompanied by flares of X-ray class M, from 08 to 10 May 2012. The structure and evolution of the confined ejections resemble that of EUV surges; however, their origin is associated to the destabilization and eruption of a mini-filament, which lay along the photo…