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  The Complex Morphology of the Young Disk MWC 758: Spirals and Dust Clumps around a Large Cavity

Boehler, Y., Ricci, L., Weaver, E., Isella, A., Benisty, M., Carpenter, J., et al. (2018). The Complex Morphology of the Young Disk MWC 758: Spirals and Dust Clumps around a Large Cavity. The Astrophysical Journal, 853.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CECC-E Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CECD-D
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2018ApJ...853..162B (Any fulltext)
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 Creators:
Boehler, Y.1, Author
Ricci, L.1, Author
Weaver, E.1, Author
Isella, A.1, Author
Benisty, M.1, Author
Carpenter, J.1, Author
Grady, C.1, Author
Shen, Bo-Ting1, Author
Tang, Ya-Wen1, Author
Perez, L.1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: infrared: planetary systems ISM: individual objects: MWC 758 planet─disk interactions protoplanetary disks stars: pre-main sequence submillimeter: planetary systems Astrophysics - Earth and Planetary Astrophysics
 Abstract: We present Atacama Large Millimeter Array observations at an angular resolution of 0.″1-0.″2 of the disk surrounding the young Herbig Ae star MWC 758. The data consist of images of the dust continuum emission recorded at 0.88 millimeter, as well as images of the 13CO and C18O J = 3-2 emission lines. The dust continuum emission is characterized by a large cavity of roughly 40 au in radius which might contain a mildly inner warped disk. The outer disk features two bright emission clumps at radii of ̃47 and 82 au that present azimuthal extensions and form a double-ring structure. The comparison with radiative transfer models indicates that these two maxima of emission correspond to local increases in the dust surface density of about a factor 2.5 and 6.5 for the south and north clumps, respectively. The optically thick 13CO peak emission, which traces the temperature, and the dust continuum emission, which probes the disk midplane, additionally reveal two spirals previously detected in near-IR at the disk surface. The spirals seen in the dust continuum emission present, however, a slight shift of a few au toward larger radii and one of the spirals crosses the south dust clump. Finally, we present different scenarios to explain the complex structure of the disk.

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 Dates: 2018
 Publication Status: Issued
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 853 Sequence Number: - Start / End Page: - Identifier: -