Search Publications
Ultra-high-resolution observations of persistent null-point reconnection in the solar corona
Barczynski, K.; Peter, H.; Chitta, L. P. +21 more
Magnetic reconnection is a key mechanism involved in solar eruptions and is also a prime possibility to heat the low corona to millions of degrees. Here, we present ultra-high-resolution extreme ultraviolet observations of persistent null-point reconnection in the corona at a scale of about 390 km over one hour observations of the Extreme-Ultravio…
Polarisation of decayless kink oscillations of solar coronal loops
Antolin, Patrick; Berghmans, David; Chitta, Lakshmi Pradeep +4 more
Decayless kink oscillations of plasma loops in the solar corona may contain an answer to the enigmatic problem of solar and stellar coronal heating. The polarisation of the oscillations gives us a unique information about their excitation mechanisms and energy supply. However, unambiguous determination of the polarisation has remained elusive. Her…
The variable source of the plasma sheet during a geomagnetic storm
Asamura, K.; Kistler, L. M.; Mouikis, C. G. +8 more
Both solar wind and ionospheric sources contribute to the magnetotail plasma sheet, but how their contribution changes during a geomagnetic storm is an open question. The source is critical because the plasma sheet properties control the enhancement and decay rate of the ring current, the main cause of the geomagnetic field perturbations that defi…
Jupiter-like planets might be common in a low-density environment
D'Orazi, Valentina; Zurlo, Alice; Gratton, Raffaele +6 more
Radial velocity surveys suggest that the Solar System may be unusual and that Jupiter-like planets have a frequency < 20% around solar-type stars. However, they may be much more common in one of the closest associations in the solar neighbourhood. Young moving stellar groups are the best targets for direct imaging of exoplanets and four massive…
Direct evidence of substorm-related impulsive injections of electrons at Mercury
Barabash, Stas; Futaana, Yoshifumi; Persson, Moa +22 more
Mercury's magnetosphere is known to involve fundamental processes releasing particles and energy like at Earth due to the solar wind interaction. The resulting cycle is however much faster and involves acceleration, transport, loss, and recycling of plasma. Direct experimental evidence for the roles of electrons during this cycle is however missin…
Evidence of an upper ionospheric electric field perturbation correlated with a gamma ray burst
Ubertini, Pietro; Bazzano, Angela; Zannoni, Ugo +68 more
Earth's atmosphere, whose ionization stability plays a fundamental role for the evolution and endurance of life, is exposed to the effect of cosmic explosions producing high energy Gamma-ray-bursts. Being able to abruptly increase the atmospheric ionization, they might deplete stratospheric ozone on a global scale. During the last decades, an aver…
The second Venus flyby of BepiColombo mission reveals stable atmosphere over decades
Haus, Rainer; Arnold, Gabriele; Hiesinger, Harald +4 more
Studies of the Venusian mesosphere provide important information about the current state of the entire Venusian atmosphere. This includes information about the dense cloud structure, its vertical thermal profile, temperature fields, and the resulting dynamical and meteorological processes that contribute to a deeper understanding of the climatolog…