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Decoding the Radial Velocity Signatures of Solar Faculae with 3D MHD Simulations

descriptionPublicationkeyboard_double_arrow_right Conference object Under curation English Publisher:ZenodoFunded by:EC | REVEAL
Authors: Kröll, Florian; Krishnamurthy, Sowmya; Shapiro, Alexander; Cameron, Andrew; Witzke, Veronika; Solanki, Sami; Ribas, Ignasi; +4 Authors

doi: 10.5281/zenodo.20685805

Decoding the Radial Velocity Signatures of Solar Faculae with 3D MHD Simulations

Abstract

This poster summarizes a synthetic solar-spectra study of radial-velocity signatures induced by faculae in Sun-like stars. Using 3D radiative MHD simulations with MURaM and spectral synthesis with MPS-ATLAS, the work investigates how facular magnetic fields modify convective blueshift across the solar disk. The results show that faculae produce relative redshifts near disk centre but can generate relative blueshifts near the limb, with strongly line-dependent amplitudes, asymmetries, and phase lags relevant for extreme-precision radial-velocity exoplanet searches.

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