For our observing needs we require the largest and the most modern facilities in both hemispheres (to obtain data for both our Southern and Northern galaxies in our sample). For this reason we have managed to achieve time at both GTC and ESO telescopes. For the period P111 of ESO …
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 …
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 …
Stella Avgousti is joining the ASSESS team, to work on the cross matching of the most recent Gaia data with products of the project. In particular, she will test the predictions of the machine-learning classifier with spectra provided by the Gaia space mission.
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 …
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 …
A few days ago we were notified that our latest proposal to use EMIR, an IR spectrograph at 10.4m GTC, was accepted! We are going to use it to observe in the near-IR a number of Red Supergiants in the NGC 6822 and IC 10 galaxies, for which we have …
For three days in June (20-23, 2022) a – broader – meeting of the VFTS project took place in Heidelberg. Stephan de Wit represented the ASSESS project by contributing with the talk: ” ASSESSing Red Supergiants, in the Local Group … and beyond!”. After a short presentation of the whole …
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, …
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 …
