Academic paper

Pollux: high-resolution precision spectroscopy and polarimetry for the Habitable Worlds Observatory

Authors: David Le Mignant, Coralie Neiner, Jean-Claude Bouret, Luca Fossati, Eduard Muslimov, Kjetil Dohlen, Anne Bonnefoi, Jean-Michel Reess, M\'elissa Alligui\'e, Sreejith A. G., Aquib Moine, Adrien Girardot (for the Pollux consortium)Published: 2026-08-01Paper ID: 2608.00522Category: astro-ph.IMLicense: CC BY 4.0

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Abstract

Pollux is a high-resolution spectrograph and spectropolarimeter (R from 65000 to 100000) covering a spectral range from 100 nm to 1750 nm, proposed by a European consortium to equip NASA s Habitable Worlds Observatory (HWO). This instrument aims to revolutionize the study of stellar and (exo)planetary systems, as well as cosmic ecosystems, by combining high spectral resolution, broad and simultaneous spectral coverage, temporal stability, and unique UV spectropolarimetric capabilities, thus opening a new parameter space for astrophysics.

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