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  Shadows and asymmetries in the T Tauri disk HD 143006: evidence for a misaligned inner disk

Benisty, M., Juhász, A., Facchini, S., Pinilla, P., de Boer, J., Pérez, L. M., et al. (2018). Shadows and asymmetries in the T Tauri disk HD 143006: evidence for a misaligned inner disk. Astronomy and Astrophysics, 619.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CEFC-8 Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CEFD-7
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2018A&A...619A.171B (Any fulltext)
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 Creators:
Benisty, M.1, Author
Juhász, A.1, Author
Facchini, S.1, Author
Pinilla, P.1, Author
de Boer, J.1, Author
Pérez, L. M.1, Author
Keppler, M.1, Author
Muro-Arena, G.1, Author
Villenave, M.1, Author
Andrews, S.1, Author
Dominik, C.1, Author
Dullemond, C. P.1, Author
Gallenne, A.1, Author
Garufi, A.1, Author
Ginski, C.1, Author
Isella, A.1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: protoplanetary disks techniques: polarimetric radiative transfer scattering Astrophysics - Earth and Planetary Astrophysics
 Abstract: Context. While planet formation is thought to occur early in the history of a protoplanetary disk, the presence of planets embedded in disks, or of other processes driving disk evolution, might be traced from their imprints on the disk structure.
Aims: We study the morphology of the disk around the T Tauri star HD 143006, located in the 5-11 Myr-old Upper Sco region, and we look for signatures of the mechanisms driving its evolution.
Methods: We observed HD 143006 in polarized scattered light with VLT/SPHERE at near-infrared (J-band, 1.2 μm) wavelengths, reaching an angular resolution of 0.037'' ( 6 au). We obtained two datasets, one with a 145 mas diameter coronagraph, and the other without, enabling us to probe the disk structure down to an angular separation of 0.06'' ( 10 au).
Results: In our observations, the disk of HD 143006 is clearly resolved up to 0.5'' and shows a clear large-scale asymmetry with the eastern side brighter than the western side. We detect a number of additional features, including two gaps and a ring. The ring shows an overbrightness at a position angle (PA) of 140°, extending over a range in position angle of 60°, and two narrow dark regions. The two narrow dark lanes and the overall large-scale asymmetry are indicative of shadowing effects, likely due to a misaligned inner disk. We demonstrate the remarkable resemblance between the scattered light image of HD 143006 and a model prediction of a warped disk due to an inclined binary companion. The warped disk model, based on the hydrodynamic simulations combined with three- dimensional radiative transfer calculations, reproduces all major morphological features. However, it does not account for the observed overbrightness at PA 140°.
Conclusions: Shadows have been detected in several protoplanetary disks, suggesting that misalignment in disks is not uncommon. However, the origin of the misalignment is not clear. As-yet-undetected stellar or massive planetary companions could be responsible for them, and naturally account for the presence of depleted inner cavities. Based on observations performed with SPHERE/VLT under program ID 097.C-0902(A) and 095.C-0693(A).

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 Dates: 2018
 Publication Status: Issued
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Title: Astronomy and Astrophysics
Source Genre: Journal
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Pages: - Volume / Issue: 619 Sequence Number: - Start / End Page: - Identifier: -