maravelias.info

on my professional endeavors...

maravelias.info

maravelias.info

maravelias.info

on my professional endeavors...

the basics

who am i?

Astrophysicist with a robust foundation in Physics and Engineering, complemented by proficient Data Science skills encompassing statistics and machine/deep learning applications.

current position

Since September 2024 I am an independent researcher in collaboration with PeriAstron and IA-FORTH (in Crete, Greece). I am also the acting Director of PeriAstron (since 2022) and work also as a Science Communicator.

research interests

Observational Astrophysics focusing on stellar astrophysics and massive stars (phases, evolution), in different galaxies. Use of statistical tools and implementation of machine/deep learning approaches. Professional-amateur networking and collaborations, and Openness in Astronomy.

latest news

Traveling:

Beginning of June (2-6) I will be at UniversAI conference in Athens, while at the end of June I will travel to Patras for the 17th Hellenic Astronomical Conference (June 30-July 2).

Teaching/Supervising:
Recent Publications:

Latest publications

New Paper: Antoniadis et al. 2025: Investigating the metallicity dependence of the mass-loss rate relation of red supergiants

New Paper: Antoniadis et al. 2025: Investigating the metallicity dependence of the mass-loss rate relation of red supergiants

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...
Read More "New Paper: Antoniadis et al. 2025: Investigating the metallicity dependence of the mass-loss rate relation of red supergiants"
New Paper: Bodensteiner et al. 2025: Binarity at Low Metallicity (BLOeM) — Multiplicity properties of Oe and Be stars

New Paper: Bodensteiner et al. 2025: Binarity at Low Metallicity (BLOeM) — Multiplicity properties of Oe and Be stars

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...
Read More "New Paper: Bodensteiner et al. 2025: Binarity at Low Metallicity (BLOeM) — Multiplicity properties of Oe and Be stars"
New Paper: Muñoz-Sanchez et al. 2024: The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant

New Paper: Muñoz-Sanchez et al. 2024: The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant

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...
Read More "New Paper: Muñoz-Sanchez et al. 2024: The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant"
New paper: Zapartas et al. 2024: The effect of mass loss in models of red supergiants in the Small Magellanic Cloud:

New paper: Zapartas et al. 2024: The effect of mass loss in models of red supergiants in the Small Magellanic Cloud:

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,...
Read More "New paper: Zapartas et al. 2024: The effect of mass loss in models of red supergiants in the Small Magellanic Cloud:"
New paper: Shenar et al. 2024: Binarity at LOw Metallicity (BLOeM): I. a spectroscopic VLT monitoring survey of massive stars in the SMC

New paper: Shenar et al. 2024: Binarity at LOw Metallicity (BLOeM): I. a spectroscopic VLT monitoring survey of massive stars in the SMC

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...
Read More "New paper: Shenar et al. 2024: Binarity at LOw Metallicity (BLOeM): I. a spectroscopic VLT monitoring survey of massive stars in the SMC"
New paper: de Wit et al. 2024: Investigating episodic mass loss in evolved massive stars: II. Physical properties of red supergiants at subsolar metallicity

New paper: de Wit et al. 2024: Investigating episodic mass loss in evolved massive stars: II. Physical properties of red supergiants at subsolar metallicity

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...
Read More "New paper: de Wit et al. 2024: Investigating episodic mass loss in evolved massive stars: II. Physical properties of red supergiants at subsolar metallicity"

blog

New Paper: Antoniadis et al. 2025: Investigating the metallicity dependence of the mass-loss rate relation of red supergiants

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 …

Astronomy | Publications

New Paper: Bodensteiner et al. 2025: Binarity at Low Metallicity (BLOeM) — Multiplicity properties of Oe and Be stars

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 …

Astronomy | Publications

New Paper: Muñoz-Sanchez et al. 2024: The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant

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 …

Astronomy | Publications

New paper: Zapartas et al. 2024: The effect of mass loss in models of red supergiants in the Small Magellanic Cloud:

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 …

Astronomy | Publications

New paper: Shenar et al. 2024: Binarity at LOw Metallicity (BLOeM): I. a spectroscopic VLT monitoring survey of massive stars in the SMC

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 …

Astronomy | Publications

The 2024 Summer School for Astrostatistics in Crete is ready to launch!

It is Friday night and only two days are left before another Summer School for Astrostatistics in Crete ! Everything is ready and I am excited for a totally new iteration of our school. I have to admit though that after three already successful events we have streamlined the process. …

Astronomy | Teaching