Even quiescent solar prominences may become active and sometimes erupt. These events are occasionally linked to coronal mass ejections. However we know very little about the plasma properties during the activation and eruption processes. We present new computations of the helium line profiles emitted by an eruptive prominence. The prominence is modelled as a plane-parallel slab standing vertica...

Using the multi-temperature observations from SDO/AIA on 30th December 2019, we provide a signature of prominence driven forced magnetic reconnection in corona and associated plasma dynamics during 09:20 UT to 10:38 UT. A hot segment erupts with speed 21 km/s destabilises entire system. Thereafter, it rose upward north 09:28 09:48 24 km/s. The eruptive stretches overlying field lines 27-28 , wh...

Solar prominences are formed by partially ionized plasma with inter-particle collision frequencies generally warranting magnetohydrodynamic treatment. In this work, we explore the dynamical impacts and observable signatures of two-fluid effects in parameter regimes when ion-neutral collisions do not fully couple neutral charged fluids. We perform 2.5D (charges - neutrals) simulations Rayleigh-T...

Observations of stellar prominences on young rapidly rotating stars provide unique probes of their magnetic fields out to many stellar radii. We compare two independently obtained datasets of the K3 dwarf Speedy Mic (BO Mic, HD 197890) using the Anglo-Australian Telescope (AAT) and the ESO Very Large Telescope (VLT). Taken more than a fortnight apart they provide the first insight into the evol...

In the present study we investigated the effect of semantic context on the perception of words that differ only in the lexical stress pattern. Our study was based on the disyllabic German word AUGUST. Depending on whether the lexical stress is on the first or the second syllable the word refers to either a name or a month. By means of a forced-choice identification experiment we tested to what ...