Kraus et al. 2022: Environments of evolved massive stars – evidence for episodic mass ejections

Environments of evolved massive stars: evidence for episodic mass ejections M. Kraus, L. S. Cidale, M. L. Arias, A. F. Torres, I. Kolka, G. Maravelias, D. H. Nickeler, W. Glatzel and T. Liimets The post-main sequence evolutionary path of massive stars comprises various transition phases, in which the stars shed …

GTC time for 2023A semester granted

We have a successful record of observing proposals with GTC to observe a number of Northern Galaxies for the ASSESS project. Although we got time in 2022A semester (~25 hours with OSIRIS) we did not manage to obtain the observations. The instrument was offered on a shared risk mode as …

de Wit et al. 2022: Properties of luminous red supergiants

Properties of luminous red supergiant stars in the Magellanic Clouds S. de Wit, A.Z. Bonanos, F. Tramper, M. Yang, G. Maravelias, K. Boutsia, N. Britavskiy, and E. Zapartas There is evidence that some red supergiants (RSGs) experience short lived phases of extreme mass loss, producing copious amounts of dust. These …

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 …

Participating at the Summer School in Statistics for Astronomers XVII

For the 17th year, Penn State’s Center for Astrostatistics offered its week-long Summer School in statistical methodology for astronomy. The School provides an intensive program in statistical inference covering topics such as principles of probability and inference, regression and model selection, bootstrap resampling, multivariate clustering and classification, Bayesian data analysis, …

Seminar for TLS Tautenburg

Grigoris got an invitation in March to give a talk to the Thüringer Landessternwarte Tautenburg, scheduled for June 21 (the summer solstice 2022). With the title “The ASSESS classifier: a machine-learning tool to uncover populations of evolved massive stars in nearby galaxies” he gave an introduction to the massive stars …