Published June 14, 2026
| Version v1
Poster
Open
Decoding the Radial Velocity Signatures of Solar Faculae with 3D MHD Simulations
Authors/Creators
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1.
University of Graz
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2.
Max Planck Institute for Solar System Research
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3.
University of St Andrews
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4.
Consejo Superior de Investigaciones Científicas
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5.
Institut d'Estudis Espacials de Catalunya
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6.
Flinders University
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7.
University of Colorado Boulder
- 8. Institut d'Estudis Espacials de Catalunya: Barcelona, Catalunya, ES
Description
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.
Files
Cool_Stars_Poster_Florian_Kroell.pdf
Files
(1.2 MB)
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Additional details
Identifiers
- arXiv
- arXiv:2605.22615
Funding
References
- Vögler, A., et al. (2005), A&A, 429, 335 https://doi.org/10.1051/0004-6361:20041507
- Witzke, V., et al. (2021), A&A, 653, A65 https://doi.org/10.1051/0004-6361/202140275