The complex morphology of the young disk MWC 758: spirals and dust clumps around a large cavity
Author
dc.contributor.author
Boehler, Y.
Author
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Ricci, L.
Author
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Weaver, E.
Author
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Isella, A.
Author
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Benisty, Myriam
Author
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Carpenter, J.
Author
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Grady, C.
Author
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Shen, Bo-Ting
Author
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Tang, Ya-Wen
Author
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Pérez Muñoz, Laura
Admission date
dc.date.accessioned
2018-07-26T20:54:55Z
Available date
dc.date.available
2018-07-26T20:54:55Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
Astrophysical Journal 853:162 (13pp), 2018 February 1
es_ES
Identifier
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10.3847/1538-4357/aaa19c
Identifier
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https://repositorio.uchile.cl/handle/2250/150358
Abstract
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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 (CO)-C-13 and (CO)-O-18 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 similar to 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 (CO)-C-13 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.
es_ES
Patrocinador
dc.description.sponsorship
NASA Origins of Solar Systems program
NNX15AB06G
NSF
AST-1535809
NRAO
AST-0836064
National Aeronautics and Space Administration
15XRP15 20140
Ministry of Science and Technology (MoST) in Taiwan
MoST 103-2119-M-001-010-MY2