1. Réunion zoom sur les périmètres de l’ATCG le 4 novembre à 13h30
2. First RAMSES school for developers, 9 – 12 December 2025, Lyon, France
3. Tools Workshop organized by the GDR CoPhy, 3 – 4 November, 2025, LAM, Marseille, France
4. Conference “Towards the Full Bloom of First Star, Galaxy, and Black Hole Formation Exploration: JWST + Multi-Facility Observations and Theory for Future Programs”, March 23-27, 2026, Tokyo, Japan
Envoyez svp vos propositions d’annonces à l’adresse : atcg@services.cnrs.fr
Pour vous inscrire ou gérer votre abonnement à la liste ATCG: https://listes.services.cnrs.fr/wws/info/atcg.newsletter
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1. Réunion zoom sur les périmètres de l’ATCG le 4 novembre à 13h30
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Lors de la dernière prospective, une discussion sur les périmètres des différentes actions thématiques a été entamée. En particulier, la question s’est posée de maintenir l’ATCG sur les périmètres de l’ancien PNCG (cosmologie et galaxies), ou bien de séparer Cosmologie et Galaxies (ATC et ATG). Cependant, le conseil du PNCG (et la communauté au sens large) n’ayant pas un avis unanime clair, une réflexion plus poussée sur cette possibilité a été remise à plus tard.
Nous vous proposons un temps de discussion et d’échange sur cette question le mardi 4 novembre à 13h30 par zoom. En particulier, sera présentée une initiative de cosmologistes se proposant de recenser via un sondage les personnes qui souhaiteraient avoir une ATC séparée (et donc deux actions thématiques, ATC et ATG), autour du texte ci-dessous:
Pour des raisons d’organisation, si vous souhaitez présenter un court argumentaire (dans un sens ou dans l’autre), merci de l’indiquer à Samuel Boissier (samuel.boissier@lam.fr).
Les informations de connexion :
Heure: 4 nov. 2025 01:30 PM Paris
Participer à la réunion Zoom
ID de réunion: 910 8652 1780
Code secret: 376880
Transmis par Samuel Boissier
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2. First RAMSES school for developers, 9 – 12 December 2025, Lyon, France
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The RAMSES SNO is pleased to announce its first RAMSES school for developers. This school will take place in Lyon from Dec. 9 at 2pm to Dec. 12 (5pm), 2025. It is designed to provide a thorough and practical introduction to the inner workings of the RAMSES code and is addressed to experienced users who wish to step up and develop their own models within RAMSES.
The school will start with a mix of lectures and exercises that cover most aspects of the code, and will end, if time allows, with a few projects where students will be guided to implement various features that are typical developments.
The lectures and exercises will cover the following topics.
– git for RAMSES
– General architecture of the code
– Data structures
– Particles
– Parameters, initialisations, and outputs
– MPI communications
– Particle-cell interactions
– Miscelaneous things (cooling, passive scalars, boundary conditions,…)
– Refinement schemes
The school can host no more than 8 participants and in order to make a fair selection, we ask candidates to provide upon registration a short description of the project they have in line with RAMSES, and a short summary of their experience in numerical astrophysics and with RAMSES.
The school is open to any professional astrophysicist (PhD, postdoc, engineer, researcher) working in France or abroad.
Registration is now open on the school website, and it will close on Nov. 8, 2025.
Transmis par Jérémy Blaizot
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3. Tools Workshop organized by the GDR CoPhy, 3 – 4 November, 2025, LAM, Marseille, France
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We are pleased to announce the third edition of the Tools Workshop organized by the GDR CoPhy, which will take place on November 3rd and 4th, 2025, at the Laboratoire d’Astrophysique de Marseille (LAM). For your information, this event is just before the Action Dark Energy colloquium that will take place in Montpellier. There is no registration fee.
This workshop will focus on new tools and methodologies developed within the French community for cosmology, with a special emphasis on photometric redshift estimators (such as LePhare), strong lensing image synthesis/analysis, and the use of Manticore data products (https://cosmictwin.org) for cross-correlation analysis between large cosmological surveys (Field Level Inference topics).
Registration and the call for contributions is opened. We have the possibility to fund a few travels to participate to the meeting. While registering, please click on the button “Do you need a financial help for the travel?”. We will contact you again for details.
Venue: Laboratoire d’Astrophysique de Marseille UMR7326 Pôle de l’Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille CEDEX 13 FRANCE
Directions: From the central train station: take subway line 1 to the terminus La Rose, then bus B3 (2 stops).
The workshop’s website for registration is https://indico.iap.fr/e/CophyTools2025.
Transmis par Guilhem Lavaux
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4. Conference “Towards the Full Bloom of First Star, Galaxy, and Black Hole Formation Exploration: JWST + Multi-Facility Observations and Theory for Future Programs”, March 23-27, 2026, Tokyo, Japan
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The Tokyo conference “Towards the Full Bloom of First Star, Galaxy, and Black Hole Formation Exploration” will be held in March 23-27, 2026, at downton Tokyo, Japan.
In this conference, we will bring and discuss the latest observational and theoretical results, pushing the frontier of galaxy formation and cosmic evolution toward a comprehensive understanding of the first stars, galaxies, and supermassive black holes. We will also explore future programs with JWST and other current facilities. This meeting will additionally honor Toru Yamada’s contributions to both space- and ground-based programs, whose pioneering work in high-z galaxy studies continues to provide valuable insight for shaping the next generation of research that will fully bloom in the 2030s.
We are looking forward to seeing you and discussing exciting sciences
during the iconic cherry blossom season in Tokyo.
The registration form and more details are found at
http://cos.icrr.u-tokyo.ac.jp/conference/tokyojwst2026
The deadline of the registration is November 15.
Scientific Topics
– First Stars/Clusters/Galaxies
– ISM Chemistry (Ionized State)
– Dust and Cold Gas
– SMBH and AGN (incl. LRDs)
– Massive/Quiescent Galaxies
– Morphology and Dynamics (incl. Outflows and Feedback)
– IGM and Reionization (incl. CGM)
– Future Projects/Instrumentation
Transmis par Benjamin Magnelli