Bonanos et al. 2023: Investigating episodic mass loss in evolved massive stars: I. Spectroscopy of dusty massive stars in ten southern galaxies

Investigating episodic mass loss in evolved massive stars: I. Spectroscopy of dusty massive stars in ten southern galaxies A.Z. Bonanos, F. Tramper, S. de Wit, E. Christodoulou, G. Munoz-Sanchez, K. Antoniadis, S. Athanasiou, G. Maravelias, M. Yang, E. Zapartas The ASSESS project aims to determine the role of episodic mass-loss …

Bonanos et al. 2023: Introducing the ASSESS project: Episodic Mass Loss in Evolved Massive Stars – Key to Understanding the Explosive Early Universe

Introducing the ASSESS project: Episodic Mass Loss in Evolved Massive Stars – Key to Understanding the Explosive Early Universe A.Z. Bonanos, G. Maravelias, M. Yang, F. Tramper, S. de Wit, E. Zapartas, K. Antoniadis, E. Christodoulou, G. Munoz-Sanchez Episodic mass loss is not understood theoretically, neither accounted for in state-of-the-art …

Maravelias et al. 2023: Discovering New B[e] Supergiants and Candidate Luminous Blue Variables in Nearby Galaxies

Discovering New B[e] Supergiants and Candidate Luminous Blue Variables in Nearby Galaxies Grigoris Maravelias, Stephan de Wit, Alceste Z. Bonanos, Frank Tramper, Gonzalo Munoz-Sanchez and Evangelia Christodoulou Mass loss is one of the key parameters that determine stellar evolution. Despite the progress we have achieved over the last decades we …

Vink et al. 2023: X-Shooting ULLYSES: massive stars at low metallicity I. Project Description

X-Shooting ULLYSES: massive stars at low metallicityI. Project Description Jorick S. Vink, A. Mehner, P. A. Crowther, A. Fullerton, M. Garcia, F. Martins, N. Morrell, L.M. Oskinova, N. St-Louis, A. ud-Doula, A.A.C. Sander, H. Sana, J.-C. Bouret, B. Kubátová, P. Marchant, L.P. Martins, A. Wofford, J. Th. van Loon, O. …

Yang et al. 2023: Evolved Massive Stars at Low-metallicity V. Mass-Loss Rate of Red Supergiant Stars in the Small Magellanic Cloud

Evolved Massive Stars at Low-metallicity V. Mass-Loss Rate of Red Supergiant Stars in the Small Magellanic Cloud Ming Yang (杨明), Alceste Z. Bonanos, Biwei Jiang (姜碧沩), Emmanouil Zapartas, Jian Gao (高健), Yi Ren(任逸), Man I Lam (林敏仪), Tianding Wang (王天丁), Grigoris Maravelias, Panagiotis Gavras, Shu Wang (王舒), Xiaodian Chen (陈孝钿), …

Contribution to the XV meeting of the Spanish Astronomical Society

Gonzalo Munoz-Sanchez traveled to Tenerife (Spain) for a week in September (5-9), to participate in the XV scientific meeting of the Spanish Astronomical Society. There he presented his work from the reduction of GTC multi-object spectroscopic data we have obtained for NCG 6822 and IC 10 galaxies. The poster is …

Maravelias et al. 2022: A machine-learning photometric classifier for massive stars in nearby galaxies I. The method

A machine-learning photometric classifier for massive stars in nearby galaxies I. The method Grigoris Maravelias, Alceste Z. Bonanos, Frank Tramper, Stephan de Wit, Ming Yang, Paolo Bonfini Context. Mass loss is a key parameter in the evolution of massive stars. Despite the recent progress in the theoretical understanding of how …

Maravelias & Kraus 2022: Bouncing against the Yellow Void — exploring the outbursts of ρ Cas from visual observations

Bouncing against the Yellow Void — exploring the outbursts of ρ Cas from visual observations Grigoris Maravelias and Michaela Kraus Massive stars are rare but of paramount importance for their immediate environment and their host galaxies. They lose mass from their birth through strong stellar winds up to their spectacular …

ASSESS Team on IAUS 366 on the Origin of Outflows in Evolved Stars

The ASSESS team is joining the IAUS 366 “On the Origin of Outflows in Evolved Stars”, organized virtually from Nov 1-5. Alceste will give an overview (Wednesday, Nov. 3, @12:20 UTC) of the ASSESS project followed by the advance we have achieved over the last years, as first results are …

Talks from the 15th Hellenic Astronomical Conference

Would like to learn what we have been doing so far?

Then you can take a look at our talks from the 15th Hellenic Astronomical Conference that became recently available online.

“Applying machine-learning methods to build a photometric classifier for massive stars in nearby galaxies”
by Grigoris Maravelias
“Spectral analysis of evolved massive stars in the SMC and LMC”
by Stephan de Wit
“Evolved massive stars in the Magellanic Clouds”
by Ming Yang
“Bouncing against the Yellow Void – the case of rho Cas”
by Grigoris Maravelias (poster)