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), …
The 2023 version of the VFTS meeting was held in Max Planck Institute for Astrophysics in Garching for three days in March (27-29). Like last year’s meeting the ASSESS team was there to discuss our recent findings. This time though the representation was broader with more members of the group …
About a year ago Stathis Athanasiou joined our team to work on cross-matching sources from the Hubble Space Telescope to those detected from the ASSESS observations. After a whole year of efforts he managed to complete his thesis and defend it successfully ! Details of the thesisTitle: Mass-loss rates of …
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 …
