Dual-band Observations of the Asymmetric Ring around CIDA 9A: Dead or Alive?

While the most exciting explanation of the observed dust asymmetries in protoplanetary disks is the presence of protoplanets, other mechanisms can also form the dust features. This paper presents dual-wavelength Atacama Large Millimeter/submillimeter Array observations of a large asymmetric dusty ri...

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Bibliographic Details
Published in:The Astrophysical journal 2024-01, Vol.961 (1), p.28
Main Authors: Harsono, Daniel, Long, Feng, Pinilla, Paola, Rota, Alessia A., Manara, Carlo F., Herczeg, Gregory J., Johnstone, Doug, Rosotti, Giovanni, Lodato, Giuseppe, Menard, Francois, Tazzari, Marco, Shi, Yangfan
Format: Article
Language:English
Subjects:
Astrophysics
Asymmetric structures
Asymmetry
Circumstellar disks
Dust
Dust emission
M stars
Molecular gases
Planet formation
Protoplanetary disks
Protoplanets
Radio telescopes
Wavelengths
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Summary:While the most exciting explanation of the observed dust asymmetries in protoplanetary disks is the presence of protoplanets, other mechanisms can also form the dust features. This paper presents dual-wavelength Atacama Large Millimeter/submillimeter Array observations of a large asymmetric dusty ring around the M-type star CIDA 9A. We detect a dust asymmetry in both 1.3 and 3.1 mm data. To characterize the asymmetric structure, a parametric model is used to fit the observed visibilities. We report a tentative azimuthal shift of the dust emission peaks between the observations at the two wavelengths. This shift is consistent with a dust trap caused by a vortex, which may be formed by an embedded protoplanet or other hydrodynamical instabilities, such as a dead zone. Deep high-spatial-resolution observations of dust and molecular gas are needed to constrain the mechanisms that formed the observed millimeter cavity and dust asymmetry in the protoplanetary disk around CIDA 9A.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ad0835