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arXiv · 2102.08911

Inhomogeneous dust eclipses in young stars. The case of CQ Tauri

A. V. Dodin·E. A. Suslina
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Abstract

We find that dust clouds which eclipse young stars obscure the stellar disc inhomogeneously. In the particular case of CQ Tau, we find isolated optically thick structures with sizes $\lesssim0.6R_*$ and derive the typical $A_{V}$ gradient in the plane of the sky, finding it as high as a few magnitudes per stellar radius. The large extinction gradients and complex structure of the obscuring clouds lead not only to a noticeable Rossiter--McLaughlin effect, but also to complex and variable shaping of stellar absorption lines.

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A. V. Dodin, E. A. Suslina. 2021-02-17. Inhomogeneous dust eclipses in young stars. The case of CQ Tauri. https://doi.org/10.1093/mnras%2Fstab487

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