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Optical design options for Pollux: UV spectropolarimeter project for the Habitable Worlds Observatory

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arxiv 2410.01491 v1 pith:WD2TU36F submitted 2024-10-02 astro-ph.IM

Eduard Muslimov , Coralie Neiner , Jean-Claude Bouret This is my paper · ORCID
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keywords channelsdesignoptionsspectropolarimeterconsiderdependinghabitablemain
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Pollux is a project of UV spectropolarimeter proposed as a European contribution for the planned NASA-led Habitable Worlds Observatory. In the present study we consider design options for four spectral channels. The two main channels operate in the range of 118-472 nm. We consider a few design options depending on the hosting telescope size and the approach to correct the aberrations in the camera part and show that the resolving power of R > 90 000 is reachable. In addition, we study 2 other channels: a visible and near infrared spectropolarimeter, which could reach up to 1050 nm or 1800 nm depending on the detector choice, and a far UV channel operating in the range of 100-120 nm. We also provide two design options with different resolution and main disperser type for these channels.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Interior redox state effects on the stability of secondary atmospheres and observational manifestations: LP 791-18 d as a case study for outgassing rocky exoplanets

    astro-ph.EP 2025-06 conditional novelty 6.0 of 10

    LP 791-18d's outgassed atmosphere is stable only for highly oxidized interiors (fO2-IW greater than about 2); reduced interiors lose their volatiles to hydrodynamic escape within the planet's lifetime.

  2. Pollux UV & FUV polarimeters: first lab results

    astro-ph.IM 2026-08 conditional novelty 4.0 of 10

    First laboratory results from the Pollux UV test bench demonstrate working polarization generation, a first end-to-end polarimetric measurement, and a far-UV analyser with extinction ratio 10 at 120 nm.

  3. Analyzing Stellar and Interstellar Contributions to Polarization: Modeling Approaches for Hot Stars

    astro-ph.SR 2025-05 conditional novelty 4.0 of 10

    By combining a Serkowski-law interstellar polarization with four stellar polarization models, the authors show that UV spectropolarimetry can recover intrinsic stellar polarization where the interstellar signal is weakest.

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