Matthieu Béthermin

📣 Appel à candidature pour le Prix Gemini 2026 ! La Société Astronomique de France (SAF) et la Société Française d’Astronomie et d’Astrophysique @sf2a.bsky.social lancent l’appel à candidature pour le #PrixGemini 2026 qui récompense les collaborations pro-am en #astronomie🔭*
👉🏻 tinyurl.com/k4nk7rhh

Je connaissais Karim depuis que je l'avais eu comme prof en M2 en 2007. C'était une figure de la cosmologie en France que je recroisais régulièrement. C'est tellement soudain et aléatoire.

Mes pensées vont à ses proches dans cette terrible épreuve.

And is "pedagogy" is the new excuse for bold unfounded claims after "we need to catch the interest of the public"?

3 problems here:
- you assume that a person who was a very productive researcher on one field can be relevant in another
- you assume that "brillant" people remains "brillant", but people sometimes lose their skills/sanity for various reasons
- you assume citation metric correlates with quality

Bravo à la collaboration lauréate!

📢 Une fois de plus, les femmes astronomes sont effacées de l’histoire : le hors-série Ciel & Espace sur les “découvreurs de l’Univers” n’en mentionne qu’une seule.

✊ Pour que les filles d’aujourd’hui aient des modèles.
📄 sf2a.eu/website2023/...

#FemmesEnScience #Astronomie #MatildaEffect

I was searching for the cat. There was a strange bump on the guest bed. I looked under and clearly disturbed someone's nap.

Bravo Jonathan !!!

PRIX DE THESE #SF2A 2025: Le conseil de la SF2A a l'honneur de décerner le prix de thèse 2025 à Giulia Pagnini pour sa thèse: "L'évolution précoce et tardive de notre Galaxie à travers la lentille des amas globulaires", au laboratoire GEPI, observatoire de Paris, sous la direction de P. Di Matteo.

PRIX JEUNE CHERCHEUR 2025 DE LA #SF2A
Le conseil de la SF2A a l'honneur de décerner le prix jeune chercheur - jeune chercheuse 2025 à Jonathan Freundlich, maître de conférence à l'observatoire astronomique de Strasbourg @obsstrasbourg.bsky.social pour ses recherches sur l'évolution des galaxies.

Same Grey weather in Strasbourg...

Direct links to #Euclid #ESASky:

Euclid Deep Field South: sky.esa.int/esasky/?hide...

Euclid Deep Field North: sky.esa.int/esasky/?hide...

Euclid Deep Field Fornax: sky.esa.int/esasky/?targ...

#astronomy #space @esa.int

2/2

Q1 Day – Euclid’s First ‘Quick’ Data Release Today is Q1 Day! This means the first public release of data from the full Euclid Survey. It's only a very small portion (0.4%) of the survey - just 63 square degrees on the sky, while the full survey will be over 14,000 square degrees - but in contrast to earlier data releases, this has been passed through the full Euclid Ground Segment so it represents the true quality of the data we can expect for the rest of the mission.

Q1 Day – Euclid’s First ‘Quick’ Data Release

Today is Q1 Day! This means the first public release of data from the full Euclid Survey. It's only a very small portion (0.4%) of the survey - just 63 square degrees on the sky, while the full survey will be over 14,000 square degrees - but in contrast…

No MJD?

This little cute ball of fur has managed to cure my super high level of stress in half an hour... Cats are the best!

Bonjour tout le monde, ceci est le tout nouveau compte de la Société Française d'Astronomie et d'Astrophysique. Nous espérons vous retrouver nombreux ici !

Bonjour @sf2a.bsky.social!

Thanks for co-organizing this workshop. Lots of interesting discussion, a very collaborative spirit, and lots of scientific puzzles to solve together. Science should always be like this!

10 min ;)

It was a z<6 astronomer. So, it works 😬

C'était la seconde, mais le train du matin était quand même plein de costards-cravates.

A businessman is seated next to a scientist. Another businessman comes claiming it is its seat. While the scientist checks the ticket again, the seated business makes a remark about people seated at the wrong spot... before realizing he was on the wrong spot. 2 jobs with different cultures of doubt.

Quelqu'un s'est fait plaisir en écrivant la notice décrivant les exclusion de garantie d'une assurance. En tant que physicien, je ne suis pas trop inquiet...

Thanks for this list. Can you add me?

The CONCERTO twin doctors were amazing 👏 It was so great to work with them and witness them growing as scientists.

And thanks again to the ALMA observatory for the beautiful data. These are only partially observed programs (~20%). Imagine what we could do at full depth! I really hope that we will ultimately be lucky and that one day the 500pc observations of VC875 will be completed...

Lots of thing could happen (starbursts timescale shorter than the mergers, inefficient of mergers to trigger starbursts, selection effect...). A lot more needs to be done both on the observational and simulation side... Stay tuned!

The final result is there. Our object lies on the high-end of the relation found at lower redshift, but well-below high-z starbursts (red, brown). Despite their morpho-kinematics, our sample is thus not behaving as the extreme bursts studied before at this z. Why?

This involves a couple of technicallities concerning the uncertainties. Please read the paper for more details...

So far, it sounds great, but there is still a step. In many pixels, the SNR of the IR+UV SFR measurements is pretty bad. There is thus a flattening in KS relation at the low end in some object. It is artificial. To correct for it, we used averaged values per regions.