Plenary talk at EAS 2025

This year’s European Astronomical Society meeting was held at Cork, Ireland, between 23 and 27 of June (2025). One of the plenary talks was given by Alceste (Bonanos) on June 24th. Entitled “Episodic Mass Loss in Evolved Massive Stars”, she summarized what we have managed to discover and understand during …

Bonanos 2025: Red Supergiants in the Milky Way and Nearby Galaxies

Alceste Z. Bonanos Identifications of red supergiants (RSGs) in the Milky Way and nearby galaxies have experienced an exponential increase in recent years, driven by advancements in selection techniques, the continued expansion of archival datasets, and a steady increase in spectroscopic data. This review describes the advances in methodologies and …

Antoniadis et al. 2025: Investigating the metallicity dependence of the mass-loss rate relation of red supergiants

K. Antoniadis, E. Zapartas, A. Z. Bonanos, G. Maravelias, S. Vlassis, G. Munoz-Sanchez, C. Nally, M. Meixner, O. C. Jones, L. Lenkic, P. J. Kavanagh Red supergiants (RSGs) are cool and evolved massive stars exhibiting enhanced mass loss compared to their main sequence phase, affecting their evolution and fate. However, …

Zapartas et al. 2024: The effect of mass loss in models of red supergiants in the Small Magellanic Cloud

E. Zapartas, S. de Wit, K. Antoniadis, G. Muñoz-Sanchez, D. Souropanis, A.Z. Bonanos, G. Maravelias, K. Kovlakas, M.U. Kruckow, T. Fragos, J.J. Andrews, S.S. Bavera, M. Briel, S. Gossage, E. Kasdagli, K.A. Rocha, M. Sun, P.M. Srivastava, Z. Xing The rate and mechanism of mass loss of red supergiants (RSGs) …

Muñoz-Sanchez et al. 2024b: The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant

G. Muñoz-Sanchez, M. Kalitsounaki, S. de Wit, K. Antoniadis, A.Z. Bonanos, E. Zapartas, K. Boutsia, E. Christodoulou, G. Maravelias, I. Soszynski, and A. Udalski Red Supergiants (RSGs) are cool, evolved massive stars in the last evolutionary stage before exploding as a supernova. However, the most luminous RSGs may evolve blueward …

Munoz-Sanchez et al. 2024: Episodic mass loss in the very luminous red supergiant [W60] B90 in the Large Magellanic Cloud

G. Munoz-Sanchez, S. de Wit , A. Z. Bonanos, K. Antoniadis, K. Boutsia, P. Boumis, E. Christodoulou, M. Kalitsounaki, and A. Udalski Context. Despite mounting evidence that extreme red supergiants (RSGs) undergo episodic mass-loss events, their role in RSG evolution remains uncertain. Critical questions remain unanswered, such as whether or …

Contributions to the International Conference Physics of Extreme Massive Stars

The International Conference on the Physics of Extreme Massive Stars took place on June 24-28 (2024) in Rio de Janeiro in Brazil. That was a great opportunity for our PhD students Gonzalo and Evangelia to present some of our most recent results in an international conference focused on topics such …

Contributions to the Supernova Remnants III conference

Between 9 – 15 of June (2024) the ASSESS team was in Crete to help with the materialization of the third iteration of Supernova Remnants conference, which becomes probably the most important point of reference for this particular field. However, it also intersects with ours since our targets of interest …

de Wit et al. 2024: Investigating episodic mass loss in evolved massive stars: II. Physical properties of red supergiants at subsolar metallicity

S. de Wit, A.Z. Bonanos, K. Antoniadis, E. Zapartas, A. Ruiz, N. Britavskiy, E. Christodoulou, K. De, G. Maravelias, G. Munoz-Sanchez, A. Tsopela Mass loss during the red supergiant (RSG) phase plays a crucial role in the evolution of an intermediate massive star, however, the underlying mechanism remains unknown. We …

Antoniadis et al. 2024: Establishing a mass-loss rate relation for red supergiants in the Large Magellanic Cloud

K. Antoniadis, A.Z. Bonanos, S. de Wit, E. Zapartas, G. Munoz-Sanchez, G. Maravelias High mass-loss rates of red supergiants (RSGs) drastically affect their evolution and final fate, yet their mass-loss mechanism remains poorly understood. Various empirical prescriptions scaled with luminosity have been derived in the literature, yielding results with a …