COSPAR session on solar and stellar flares

November 13, 2017, from Louise Harra

COSPAR will take place next July in Pasadena – there are many interesting session, including this one on solar and stellar flares. Please think about submitting an abstract – the deadline is 9th February, 2018.

COSPAR-18-E2.2: Solar and Stellar Flares: Multi-wavelength Oberservations and Simulations

Flaring in stars across the main sequence reveals a large range of energies and behaviour. But only flares on the Sun can be studied in great morphological detail. The Sun has the advantage of data with wonderful spatial resolution from missions such as the Solar Dynamics Observatory, IRIS or Hinode. These results are slowly transforming the way we view the magnetic processes that unleash energy in the corona. In addition, there is a clear need to understand flare coronae and chromospheres, and even photospheres, as important sites of strong, multi-wavelength emission, formed in response to the energy flow – by particle beams or other mechanisms – from the corona, and its dissipation. Thus significant contributions to the proposed session will come from observational analyses and numerical simulations of flare chromospheres, both solar and stellar. Various scenarios of energy transport and heating can be tested by observing flaring coronae and chromospheres of the Sun and stars, using the wide range of space and ground-based instrumentation now available. Comparative stellar studies are hugely beneficial in understanding the behaviour of our Sun during its life cycle – as well as showing us dramatic flarings at very young ages or in binary systems that reach energies that the Sun will never be able to achieve – named as ‘superflares’. The session will address new observations and diagnostics, and new simulations (e.g. radiation hydrodynamics) of energy transport, dissipation and radiation from stellar atmosphere with instrumentation such as IRIS, CRISP ALMA, XMM-Newton, SWIFT, Kepler and Chandra. New perspectives with Solar Orbiter, Solar-C and future stellar missions will be also highlighted.