Evangelia put a lot of effort in this work, and she nailed it! The goal was to investigate through IR spectroscopy some particular interesting sources identified from our previous work with optical spectroscopy. We successfully found evidence of episodic mass loss in four of them. Investigating episodic mass loss in …
This is a major work with contributions for many many people as we try to understand the behavior of massive stars at low metallicity. And of the key factors is binarity, how does it change when metallicity decreases ? A high fraction of close massive binary stars at low metallicity …
This is the complementary work to that of Alceste’s published some time ago, covering the southern galaxies. Now it was Stephan and Gonzalo’s turn to lead this the paper for the northern galaxies, observed with the 10.4 m GTC. We managed to classify 122 additional sources, increasing the number of …
Finally…after some years from the initial paper on the method I managed to put everything together to publish the second part of the machine-learning classifier for massive stars in nearby galaxies. This work is actually the application of the classifier to the whole sample of 26 galaxies and about 1.1 …
Kostas has been actively working on determining the mass loss rate for Red Supergiants across various metallicities. We had plenty of these sources for NGC 6822 so it was natural to include them in a straight comparison with SMC, LMC and the Milky Way. However, each of these galaxies have …
Soon after the first paper of the BLOeM collaboration (describing the survey) another two papers followed on the multiplicity properties of specific populations. In one of them, led by Julia Bodensteiner and Tomer Shenra, we looked into the multiplicity properties of the OBe population in the SMC. This is of …
This is of the most intriguing object. We are still puzzled about its nature. From a red supergiant, it became a yellow one within months to year, showing B[e] characteristics. We are not certain if this is the correct answer or something else is undergoing. But definitely an exciting object …
During the ASSESS project we carried out tons of observations and careful analysis in order to identify mass-losing evolved stars. At the same time though, Manos Zapartas was taking advantage of the new red supergiant mass loss fits we managed and put them into some perspective with theory. Equipped with …
This is the first paper of the “Binarity at LOw Metallicity (BLOeM)” collaboration which targets to obtain spectra for about 1000 massive stars in the SMC! Apart from being an extremely interesting project it really matches many of the sources I have been working with in the SMC. So perfect …
Stephan extends the work he has performed previously in the Magellanic Clouds to RSGs identified in the ASSESS project in galaxies at subsolar metallicity. 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, …
