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astro-ph.SR2026
Chromospheric sensitivity of stellar spectral lines: an unsupervised machine learning classification
Juan I. Peralta, Mariela C. Vieytes
Stellar magnetic activity alters thousands of spectral lines, limiting high-precision radial-velocity measurements, abundance analyses, and planetary characterization. We present a…
astro-ph.SR2026
HWO Target Stars and Systems: Activity and Rotation Catalog (ARC) of Potential Target Stars for the Habitable Worlds Observatory
Tara Fetherolf, Arvind F. Gupta, Elisabeth R. Newton +7
A major goal of the Habitable Worlds Observatory (HWO) is to precisely characterize exoplanets and their atmospheres. However, magnetic activity from an exoplanet's host star can c…