Inhomogeneous dust eclipses in young stars. The case of CQ Tauri. (arXiv:2102.08911v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Dodin_A/0/1/0/all/0/1">A.V. Dodin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Suslina_E/0/1/0/all/0/1">E.A. Suslina</a>
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.
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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