Speaker
Valery M. Nakariakov
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/I2.J302.pdf
Understanding the energy release in solar flares and stellar superflares by
quasi-periodic pulsations
Valery M Nakariakov (University of Warwick, UK)
Flaring energy releases observed in atmospheres of the Sun and stars in all
bands of the electromagnetic radiation and particle fluxes, are produced by the
conversion of the magnetic energy stored in the plasma into heat and kinetic
energies of nonthermal particles and bulk flows. Magnetic reconnection is
commonly accepted as the mechanism for the energy release in flares. However a
number of important details, such as the unexpected speed of the reconnection,
partition and amount of the released energy, triggering, and so on, remain to be
revealed. Moreover, those questions are connected with the flare forecasting in
the context of space weather, and also with the question whether the Sun is
capable to produce a devastating superflare, similar to those observed on
sun-like stars. Often the EM radiation generated in solar and stellar
flares shows a pronounced (quasi)-oscillatory pattern - quasi-periodic
pulsations (QPPs), with characteristic periods ranging from a fraction of a
second to several tens of minutes. We review the current understanding of QPP in
solar and stellar flares, focussing on possible physical mechanisms generating
them, address the similarity of QPP in flares and superflares and its
implications for space weather, and discuss future directions and key unanswered
questions of this emerging research field.
ile:///vboxsrv/Linux/crpp/papers/eps18/programme_committee/final_invited_abstracts/nakariakov_abstract.txt[04/03/2018 00:42:16]
