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Alexis Quintana

@alexis-space.bsky.social

Astronomy postdoc fellow in LIRA ‪(@liraastro.bsky.social)‬, Paris Observatory (@obs-paris-psl.bsky.social)‬ in 🇨🇵. Works on OB stars, stellar associations & clusters and Galactic structure & dynamics. From 🇧🇪, previously in 🇬🇧 and 🇪🇦. he/him

167 Posts208 Follower135 Folgt
ESO@eso.org · 3d ago

Total solar eclipse loading ☀️🌕🌍 On 12 August, the Moon will slip between the Earth and the Sun, turning day into night for up to a minute and a half along the path of totality. Get the gist with ESO fellow Mar Carretero Castrillo 🎬👇 🔭 #EuropeanSolarEclipse #TotalSolarEclipse 1/4

ESO@eso.org · last wk.

The conclusion of a century-long quest 😲 Our VLT obtained firm evidence that Betelgeuse, a red supergiant star in the Orion constellation and one of the most famous stars in the night sky, is not alone! 🔭 🧪 1/4

A collage of various astronomical images. The background image shows a wide view of a starry night sky, with blue lines connecting the stars of the Orion constellation. An inset image zooms into the star Betelgeuse, showing its orange surface. A second inset shows a bright companion next to the star. Image by ESO/M. Montargès et al. Background: N. Rissinger (skysurvey.org).
Aurélien Genin@astroaure.eurosky.social · 4w ago

🧪 L'archive ouverte arxiv.org vient de dépasser les 3 millions d'articles scientifiques publiés 🤯 Et autant de nouveaux résultats apportés à l'édifice de la connaissance de l'Humanité car la force d'arXiv c'est que tous les articles sont libres d'accès, gratuitement 😍

arXiv@arxiv.bsky.social · 4w ago

arXiv now hosts OVER 3 million scientific articles! 🤯 arXiv reached the 2 million article mark back in 2022 - it's only taken 4 years to add another million. Read more on the blog about this milestone and our record-bre... https://blog.arxiv.org/2026/07/09/arxiv-now-hosts-over-3-million-articles/

arXiv's monthly submission chart, showing the total number of articles (3 million) and June's record breaking month (32,040)
ESO@eso.org · 2mo ago

Heading for the Carina Nebula 🚀 The massive stars in the interior of this cosmic bubble emit intense radiation that causes the surrounding gas to glow. By contrast, other regions of the nebula contain dark pillars of dust cloaking newborn stars. https://www.eso.org/public/news/eso1828/ 🔭 🧪

Chanda Prescod-Weinstein 🌌@chanda.blacksky.app · 3mo ago

Unusual exploding star alert!!! 🔭 "Each of these events, dubbed superluminous supernovae, produced 10 or more times the amount of visible light normally seen."

NASA’s Fermi Glimpses Power Source of Supercharged Supernovae - NASA Science

An international team studying data from NASA’s Fermi Gamma-ray Space Telescope concludes the mission detected a rare, unusually luminous supernova. The researchers say it likely received its power-up...

science.nasa.gov

SETI Institute@setiinstitute.bsky.social · 3mo ago

#PPOD: The Bubble Nebula, also known as NGC 7635, is a massive cosmic balloon located approximately 7,100 light-years from Earth in the constellation Cassiopeia. This seven-light-year-wide structure was created by the intense stellar winds of a super-hot O-type star... 🧪 🔭

Image of a nebula in the shape of a bubble of blue gas, seeming to float in a larger nebula of yellow and purple dust. Several bright stars can be seen in the image, shown in purple due to the enhancements used to show details in the gas.
Alexis Quintana@alexis-space.bsky.social · 3mo ago

The paper has been accepted for publication in MNRAS! 🔭 The revised list contains 56 OB associations within 1 kpc, double the historical census! Besides tracing star formation and structure of the local Milky Way, this catalogue will be useful for target/follow-up studies! #stellarastro #galactic

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Alexis Quintana@alexis-space.bsky.social · 8mo ago

A new census of OB associations with Gaia! In this study, we took advantage of my OB stars map to find new OB associations within 1 kpc. The goal was to create a useful reference catalogue for this era, and to trace the star formation and structure of the local Milky Way. #stellarastro #galactic

Alexis Quintana@alexis-space.bsky.social · 3mo ago

Interesting study on molecular clouds! 🔭 In this paper led by Xabier Pérez-Couto, the 3D kinematics of 15 MC complexes within 2.5 kpc were studied using YSOs and OCs, showing the common origin of many nearby ones, and the crossing of the Solar System in the Orion cloud 11.5-16.5 Myr ago! #galactic

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Alexis Quintana@alexis-space.bsky.social · 4mo ago

Interesting paper led by Naira Azatyan has appeared on arxiv this morning! 🔭 They identified 26 (mostly OB) runaway stars, 7 of which confirmed to originate from clusters of the Vela OB1 association, finding that its young stellar population has a runaway fraction of ~30%. #stellarastro

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