3 papers
astro-ph.SR2026
Spectral Ratio Analysis: probing of a new suite of stellar activity indicators as a tool for astrophysical noise mitigation
Jean C. Costes, Christopher A. Watson, Ernst de Mooij +6
Stellar activity is the main barrier to detecting and/or confirming low-mass/long-period (and Earth-analogue) planets using radial-velocity (RV) measurements. Searching for reliabl…
astro-ph.SR2026
Effect of surface magnetic fields on limb darkening in main-sequence stars
N. Kostogryz, A. I. Shapiro, V. Witzke +5
Context.Stellar limb darkening encodes the thermal and radiative structure of stellar photospheres and is a key ingredient in modeling transit light curves and transmission spectra…
astro-ph.SR2025
The effect of stellar magnetic activity on measurements of morning and evening asymmetry of planetary terminator
N. Kostogryz, A. I. Shapiro, L. Carone +9
Differences in the ingress and egress shapes of transit light curves can indicate morning-evening temperature contrasts on transiting planets. Here, we pinpoint an alternative mech…