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RAS Specialist Discussion Meeting: Flares on the Sun and stars: microflares, megaflares, and the largest flare of Solar Cycle 24

Organisers: Anne-Marie Broomhall (Univ. of Warwick), James McLaughlin (Northumbria Univ.), Valery Nakariakov (Univ. of Warwick), Aaron Reid (Queen’s University, Belfast)
For queries e-mail: a-m dot broomhall at warwick dot ac dot uk

Friday, 12th April 2019
Royal Astronomical Society Lecture Theatre, Burlington House, Piccadilly

Flares that are far more energetic than typical solar flares have been observed on solar-like stars, leading to predictions that the average occurrence rate of these so-called “superflares” on “stars with similar rotation periods to the Sun is about once in 500 to 600 years” (Maehara et al., 2015). However, given that these flares are far more energetic than typical solar flares, and that the data upon which these predictions are made consist of unresolved white light observations of the star in question’s brightness, it is reasonable to ask whether these predictions are justified. This specialist discussion meeting will focus on the synergies and differences between solar and stellar flares, from the impact of observational constraints to the presence of analogous features (e.g. flare shape and quasi-periodic pulsations) and from models that can account for the vastly differing energies observed in solar and stellar flares to explanations for recent observations of flares in massive A stars that do not have outer convection zones. We will also discuss the exciting series of solar flares observed from active region AR12763 in September 2017, which included the largest flare of Solar Cycle 24, and particularly encourage the community to consider the unique Swedish solar telescope observations of this event, obtained on behalf of the UK solar physics community. Talks and posters will be accepted.

Confirmed invited speakers: Petr Heinzel (Academy of Sciences of Czech Republic), Paolo Romano (Osservatorio Astrofisico di Catania)

This Specialist Discussion Meeting is open to all; admission is free for RAS Fellows, £15 for non-fellows (£5 for full-time students). For further details of location and times see or phone the Society on 0207-734-3307.


10:00-10:25 – Coffee
10:25-10:30 – Welcome
10:30-11:00 – Paolo Romano (INAF, Osservatorio Astrofisico di Catania): The largest flares of solar cycle 24 as potential clues for stellar superflares
11:00-11:15 – Marie Dominique (Royal Observatory of Belgium): Joint observation of the X9.3 and X8.3 flares on 6 and 10 September 2017 by SDO/EVE, PROBA2/LYRA and MAVEN/EUVM
11:15-11:30 – David Kuridze (Aberystwyth University): Mapping the magnetic field of flare coronal loops
11:30-11:45 – Ciara Maguire (Trinity College Dublin): Insights into Coronal Mass EjectionShocks with the Irish Low FrequencyArray (ILOFAR)
11:45-12:00 – Dmitrii Kolotkov (University of Warwick): Quasi-periodicity and damping of slow magnetoacoustic waves and their manifestation in quasi-periodic pulsations in solar flares
12:00-12:15 – Lidia van Driel-Gesztelyi/Deb Baker (UCL/MSSL): Runaway Umbra in AR 12673 Linked to Inverse FIP Coronal Plasma Composition
12:15-12:30 – David Tsikluari (Queen Mary University of London): Electron plasma wake field acceleration in solar coronal and chromospheric plasmas
12:30-12:45 – Mykola Gordovskyy (University of Manchester): Using microwave observations for solar flare diagnostics in twisted coronal loops
12:45-13:00 – Stephane Regnier (Northumbria University): Statistics of nano- and micro-flares in active-region magnetic fields

13:00-14:00 – Lunch

14:00-14:30 – Petr Heinzel (Astronomical Institute of the Czech Academy of Sciences): Solar and stellar white-light flares
14:30-14:45 – Ahdab Althukair (Queen Mary University of London): Study of the frequency distribution of super-flares in Sun-like stars
14:45-15:00 – Hugh Hudson: Dippiness or Flariness? Precise Solar and Stellar Photometry
15:00-15:15 – Dipankar Banerjee (Indian Institute of Astrophysics): Study of Quasi-Periodic Pulsations in Super-flares : QPP analysis of post-flare light curves of AB-Dor
15:15-15:30 – Charlotte Waterfall (University of Manchester): Modelling the radio and X-ray emission from T-Tauri flares
15:30-16:00 – Tea at the Geological Society

This form is closed and is no longer accepting any submissions.

Thank you for your time.


Swedish Solar Telescope snapshot of the X9.28 solar flare, which was the largest flare of cycle 24. Credit: Aaron Reid