May 05-10, 2024 Krakow, Poland

IAU Symposium 388


1. Solar Sources of CMEs

Shin Toriumi: Solar Sources of CMEs (review), Japan

Lucie Green: Magnetic properties of active regions & eruptive structures, UK

2. CME initiation

Meng Jin: MHD Simulation of CMEs and shocks (review), USA

Dibyendu Nandi CMEs and Solar Magnetism, India

Brian Welsch: The importance of reconnection in understanding CME flux ropes, USA

3. CME, flare, eruptive prominence relationship

Jie Zhang: CME flare relationship and Early life of CMEs (review), USA

P. Vemareddy: Flux rope as the fundamental structure of CMEs

4. Detection and modeling of stellar CMEs

Kosuke Namekata: Detection and modeling of stellar CMEs (review), Japan

Astrid Veronig: EUV and X-ray signatures of stellar CMEs, Austria

5. Propagation of CMEs in solar and stellar environments

Chenglong Shen: CME propagation effects (review), China

Julian Alvarado-Gómez: Extending solar flare-CME relations to stars, Germany

Christine Verbeke: Simulations of CMEs in the interplanetary medium, Belgium

6. CMEs, shocks, and radio bursts

Emilia Kilpua: CME shocks (review), Finland

Rachel Osten: Radio observations of stellar CMEs, USA

Jasmina Magdlenic: CMEs and radio bursts, Belgium

7. CMEs and Energetic Particles

Mihir Desai: All types of SEP events from ground level enhancement (GLE) to energetic storm particle (ESP) events (review), USA

Donna Rodgers-Lee: SEPs and cosmic ray effects on exoplanetary atmospheres, Ireland

Robert Wimmer-Schweingruber: SEP environment near the Sun from Solar Orbiter and Parker Solar Probe, Germany

8. CME impact on planets/exoplanets

Paula Reyes: CMEs, ICMEs, and Geomagnetic storms (review), Chile

Vladimir Airapetian: CME impact on exoplanets, USA

Teresa Nieves-Chinchilla: CME flux ropes and geomagnetic storms, USA

9. Solar and Stellar Extreme events

Ilya Usoskin: Black swans vs. Dragon kings (review), Finland

Fusa Miyake: Historical Extreme Events, Japan

Konstantin Herbst: Modeling and observations of astrospheres, Germany

10. Final discussion and Closing (panel)

Gregg Hallinan: Instrumentation for stellar CME detection, USA (TBC)

Moira Jardine: Stellar prominences and mass loss of low-mass stars, UK

Jeremy Drake: Grand challenges in investigating stellar eruptions, USA

Kanya Kusano: Solar impact on Earth, Japan

Stefan Poedts: Solar and Stellar Flux Rope Modeling, Belgium

One-day School Lecturers (5th May 2024)

Alphonse Sterling: Solar interior and atmosphere

Seiji Yashiro/N. Gopalswamy: Coronal mass ejections: observational properties

Nat Gopalswamy: CMEs and associated phenomena

Aline Vidotto: The impact of stellar winds and CMEs on exoplanets

Ward Manchester: Propagation of CMEs in solar and stellar environments

Pertti Mäkelä: Solar Energetic Particle events

Tibor Torok: Numerical studies of CMEs

Inaugural session

History of Astronomy (solar physics) in Krakow, Poland - Marek Jamrozy ABSTRACT


Public lectures

The Intimate Life of Giant Stellar Eruptions and Signatures of Habitable Worlds - Vladimir Airapetian ABSTRACT


What is Space Weather and how do we forecast it? - Tanja Amerstorfer ABSTRACT


  • Solar Source and Initiation of CMEs

  • CME-Flare Relationship

  • CME propagation

  • Solar Energetic Particles

  • Space Weather

  • Detecting and Modeling Stellar CMEs

  • Star-planet interactions

  • Solar and Stellar Extreme events

Major Topics


The Symposium will take place in the Auditorium Maximum of the Jagiellonian University in Kraków, Poland


  • 15 July 2023 First Announcement

  • 8 November 2023 Registration and Abstract Submission Opens

  • 8 November 2023 Second Announcement

  • 21 January 2024 Travel Grants Deadline

  • 25 February 2024 Abstract Submission Deadline (oral and poster)

  • 25 February 2024 Early Registration Deadline

  • 1 March 2024 Communication of selected oral and poster contributions and grants awarded

  • 15 April 2024 Late Poster Abstract Submission Deadline (limited space)

  • 15 April 2024 Final Registration Deadline

  • 5-10 May 2024 IAU Symposium

  • 30 June 2024 Proceeding Submission Deadline

Coronal mass ejections (CMEs) from the Sun represent the most energetic solar-heliospheric events and can adversely affect human technology on Earth and in space. CMEs and ICMEs (interplanetary CMEs) contribute to space weather in two ways: (i) by populating the heliosphere with hazardous energetic particles accelerated by CME-driven shocks; (ii) by impacting planets and their environment causing magnetic storms and solar wind erosion. Thus, CME research has both scientific and practical importance. CMEs are naturally expected from other stars and they are expected to affect stellar planetary environments.

Although discovered in the early 1970s, CME research exploded with the imaging instruments on board the Solar and Heliospheric Observatory (SOHO). The multiview observations provided by the Solar Terrestrial Relations Observatory (STEREO) enabled the reconstruction of the three-dimensional (3D) flux rope nature of CMEs. New results from the Solar Dynamics Observatory (SDO) have shown that CME flux ropes can start with either hot or cold seed flux ropes. The Parker Solar Probe and Solar Orbiter are providing unprecedented data on the interplanetary evolution of CMEs. CME flux ropes propagating in the corona and interplanetary medium are affected by a multitude of interactions with the ambient solar wind and other large-scale structures resulting in large deviations from the expected trajectories. A detailed understanding of the CME initiation, physical structure, interplanetary propagation, and planetary impact is needed to forecast space weather and to help mitigate their impact. Energetic CMEs are often accompanied by powerful solar flares that have additional space weather consequences.

While flares are readily observed from other stars, observing stellar CMEs has been a challenge. Solar CME observations, therefore, provide important guidance in understanding stellar eruptions and their impact on exoplanets hosted by the stars. A synergistic approach to solar and stellar CMEs is inevitable to understand how the magnetic energy is stored and released from spatially confined magnetic regions on the stars and their consequences for star-planet relations over various timescales. Emphasis will be placed on modeling efforts that are common to both solar and stellar mass ejections and validating stellar modeling efforts with observations and models of CME initiation and propagation in the heliosphere.

This symposium is focused on transient phenomena on the Sun and stars and how these phenomena affect the planets/exoplanets. The symposium will emphasize the synergy between solar and stellar research especially on the commonality in modeling and interpretation of energetic eruptions. The symposium is timely because of the explosion of knowledge on solar and stellar flares and coronal mass ejections (CMEs). CMEs also impact planets/exoplanets and play a significant role in the evolution of the latter. The symposium will review the current results, identify gaps, and plan to make further progress on the observations and modeling of solar and stellar CMEs.

Scientific rationale