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63 papers · 1 filter
Accurate spectroscopic redshift estimation using non-negative matrix factorization: application to MUSE spectra
Masten Bourahma, Nicolas F. Bouché, Roland Bacon +5
Accurate and automated galaxy redshift determination is essential for maximizing the scientific return of spectroscopic surveys. In this paper, we propose a data-driven method to a…
SF2A Environmental Transition Commission: Summary of the 2025 workshop
Faustine Cantalloube, Jack Berat, Naïs Fargette +12
During its annual conference in 2025, the French Society of Astronomy \& Astrophysics (SF2A) hosted, for the fifth time, a special session dedicated to discussing the environmental…
Stellar halo subtraction alternative for accreting companions' characterization with integral field spectroscopy: Analytical and on-sky demonstration on the PDS70, HTLup, and YSES1 systems
R. Julo, M. Bonnefoy, F. Chatelain +5
Context. Medium-resolution IFS, such as MUSE at the VLT, are equipped to detect the emission lines of faint accreting companions when associated with dedicated stellar halo subtrac…
Diffusion models for polarimetric reconstruction of circumstellar environments
Quentin Villegas, Laurence Denneulin, Simon Prunet +5
In this paper, we propose an approach combining diffusion models and inverse problems for the reconstruction of circumstellar disk images. Our method builds upon the Rhapsodie fram…
PyLongslit: a simple manual Python pipeline for processing of astronomical long-slit spectra recorded with CCD detectors
Kostas Valeckas, Johan Peter Uldall Fynbo, Jens-Kristian Krogager +1
We present a new Python pipeline for processing data from astronomical long-slit spectroscopy observations recorded with CCD detectors. The pipeline is designed to aim for simplici…
Simplified model(s) of the GRAVITY+ adaptive optics system(s) for performance prediction
Anthony Berdeu, Jean-Baptiste Le Bouquin, Guillaume Mella +13
In the context of the GRAVITY+ upgrade, the adaptive optics (AO) systems of the GRAVITY interferometer are undergoing a major lifting. The current CILAS deformable mirrors (DM, 90…