Mapping Stellar Heterogeneities with the Nautilus Space Observatory
Rattachement africain : us. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Stellar photospheric heterogeneities, such as starspots and faculae, are a fundamental limitation for exoplanet transmission spectroscopy. Inhomogeneous surfaces can imprint wavelength-dependent signals during transits that may mimic or mask atmospheric absorption features, especially for planets orbiting cool low-mass stars. Recent work has shown that the information content of transmission spectroscopy observations can be sufficient to correct for stellar contamination, but only if stellar photosphere and active-region models have adequate fidelity. This requires empirical benchmarking with observations that validate next-generation stellar models and identify which spectral diagnostics best encode heterogeneity properties as a function of spectral type, activity level, and time. We propose a two-generation Nautilus program that leverages the scalable architecture of the observatory concept. Generation 1 would use broad-wavelength time-series observations of transiting exoplanet systems to connect starspot-crossing events and out-of-transit variability to localized and disk-integrated heterogeneity properties. Generation 2 would use the optimized spectral diagnostics identified in Generation 1 to conduct slitless spectroscopic monitoring of large samples of GKM stars on different timescales. Generation 2 instrumentation would include activity tracers of both the photosphere and chromosphere. This program would provide the benchmark data and population-level framework needed to turn stellar contamination into a calibrated input for exoplanet atmospheric retrievals.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
Où se fait cette recherche
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University of Arizona Steward Observatory pays non établi dans la noticeUniversité ou école supérieure
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Planetary Science Institute pays non établi dans la noticeOrganisation à but non lucratif
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Massachusetts Institute of Technology Department of Earth pays non établi dans la noticeUniversité ou école supérieure
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Arizona State University pays non établi dans la noticeUniversité ou école supérieure
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Kavli Institute for Astrophysics and Space Research pays non établi dans la noticeStructure de recherche
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School of Earth and Space Exploration pays non établi dans la noticeUniversité ou école supérieure
Steward Observatory — University of Arizona, Planetary Science Institute et Department of Earth — Massachusetts Institute of Technology, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.