UNIONS: A direct measurement of intrinsic alignment with BOSS/eBOSS spectroscopy

• Published in: Astronomy and astrophysics (Berlin) Vol. 699; p. A201
• Main Authors: Hervas Peters, Fabian, Kilbinger, Martin, Paviot, Romain, Baumont, Lucie, Russier, Elisa, Zhang, Ziwen, Murray, Calum, Pettorino, Valeria, de Boer, Thomas, Fabbro, Sébastien, Guerrini, Sacha, Hildebrandt, Hendrik, Hudson, Michael J., Van Waerbeke, Ludovic, Wittje, Anna
• Format: Journal Article
• Language: English
• Published: 01.07.2025

Context. During their formation, galaxies are subject to tidal forces, which create correlations between their shapes and the large-scale structure of the Universe, known as intrinsic alignment. This alignment is a source of contamination for cosmic-shear measurements as we need to disentangle corre...