The Curious Case of Dark Faculae on M Dwarf Stars

arXiv:2606.19854 · astro-ph.SR · Submitted 2026-06-18 · Read on arXiv

Alexander~I. ~Shapiro, Sara~Seager, Sami~K. ~Solanki, Nadiia~Kostogryz, Veronika~Witzke, Krishnamurthy~Sowmya, Tanayveer~Bhatia, Yvonne~C. ~Unruh, Robert~Cameron

astro-ph.SR

Submitted: 2026-06-18

Comments: Accepted for publication in the Astrophysical Journal

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Metallicity — 12× in this paper · explained in 3 episodes
• Active Regions — 1× in this paper · explained in 1 episode
• Core — 1× in this paper · explained in 2 episodes
• Magnetohydrodynamics (MHD) — 1× in this paper · explained in 3 episodes
• Transmission spectroscopy — 1× in this paper · explained in 2 episodes

Sources

• Stellar Surface Magnetic Fields Impact Limb Darkening
• First Calculations of Starspot Spectra based on 3D Radiative Magnetohydrodynamics Simulations

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