Welcome to the ORION-B project
Molecular lines and line ratios are commonly used to infer properties of Galactic and extra-galactic star forming regions. The new generation of (sub-)millimeter receivers turns every observation nearly into a line survey. To fully exploit this technical advance in extra-galactic studies requires detailed bench-marking of available line diagnostics. We aim to develop the Orion B Giant Molecular Cloud as a local template for interpreting Galactic and extra-galactic molecular line observations.
ANR project website 
2023
2023-12-07: Pierre Palud successfully defended his PhD Thesis
2023-10-01: Helena Mazurek starts her PhD thesis From small to large scales: structure and composition of molecular gas
2023-09-29: Miriam Santa-Maria successfully defended her PhD Thesis
2023-09-05: Miriam Santa-Maria's first paper is accepted by A&A - HCN emission from translucent gas and UV-illuminated cloud edges revealed by wide-field IRAM 30 m maps of the Orion B GMC
2023-07-31: Pierre Palud and Lucas Einig's paper is accepted by A&A - Neural network-based emulation of interstellar medium models
2023-07-18: Lucas Einig's first paper is accepted by A&A - Deep learning denoising by dimension reduction: Application to the ORION-B line cubes
2023-06-23: Pierre Palud's first paper is published by IEEE Transactions on Signal Processing - Efficient Sampling of Non Log-Concave Posterior Distributions With Mixture of Noises
2022
2022-11-15: Antoine Zakardjian starts his PhD thesis Inferring physical conditions in extragalactic GMCs through joint analysis of ORION-B and PHANGS data
2022-11-14: Mathilde Gaudel's first paper is accepted by A&A - Gas kinematics around filamentary structures in the Orion B cloud
2022-09-22: Léontine Ségal starts her PhD thesis - Robustness of the Estimation of Physical and Chemical Characteristics of Giant Molecular Clouds without Ground Truth
2021
2021-10-01: Lucas Einig starts his PhD thesis - Computation Graphs Applied to the Study of the Conditions of Star Formation
2020
2023-10-01: Pierre Palud starts his PhD thesis Sampling methods for statistical inference of non-linear inverse problems : spatial distribution of physico-chemical properties of the interstellar medium
2020-08-25: Pierre Gratier's second paper is accepted by A&A - Quantitative inference of the H2 column densities from 3 mm molecular emission: A case study towards Orion B
2020-07-02: Emeric Bron's second paper is accepted by A&A - Tracers of the ionization fraction in dense and translucent gas: I. Automated exploitation of massive astrochemical model grids
2020-04-28: Antoine Roueff's paper is accepted by A&A - C18O, 13CO, and 12CO abundances and excitation temperatures in the Orion B molecular cloud: An analysis of the precision achievable when modeling spectral line within the Local Thermodynamic Equilibrium approximation
2019
2019-02-06: Jan H. Orkisz's second paper is accepted by A&A - A dynamically young, gravitationally stable network of filaments in Orion B.
2018
2018-10-22: Jan H. Orkisz successfully defended his PhD Thesis - Understanding the structure of molecular clouds : multi-line wide-field imaging of Orion B.
2017
2017-10-02: Emeric Bron's paper is accepted by A&A - Clustering the Orion B giant molecular cloud based on its molecular emission.
2017-05-24: The ORION-B project is noticed in Nature - Astrophysics: Multi-molecular views of a stellar nursery.
2017-03-07: First ORION-B press release to celebrate the publications of the first three papers in the same A&A issue - Beyond the appearances: The anatomy of the Orion Jedi revealed by radio-astronomy.
2017-01-13: Pierre Gratier's paper is accepted by A&A - Dissecting the molecular structure of the Orion B cloud: Insight from Principal Component Analysis.
2017-01-02: Jan H. Orkisz's paper is accepted by A&A - Turbulence and star formation efficiency in molecular clouds: solenoidal versus compressive motions in Orion B.
2016
2016-11-08: The first ORION-B paper (Jérôme Pety's one) is accepted by A&A - The anatomy of the Orion B Giant Molecular Cloud: A local template for studies of nearby galaxies.
2016-10-12: The ORION-B project is now on ResearchGate - ORION-B: The Anatomy of a Giant Molecular Cloud.
2016-09-27: Chloé Daudon successfully defended her internship - Statistical analysis of hyperspectral data. New keys to understand the structure, composition and the dynamics of the interstellar medium
2016-04-01: Chloé Daudon is starting a 6 months internship with us to finish her engineer school - ENSG Géomatique
2015
2015-09-01: Jan H. Orkisz starts his PhD thesis - Understanding the structure of molecular clouds : multi-line wide-field imaging of Orion B.