Nine Localized Deviations from Keplerian Rotation in the DSHARP Circumstellar Disks: Kinematic Evidence for Protoplanets Carving the Gaps

We present evidence for localized deviations from Keplerian rotation, i.e., velocity "kinks," in 8 of the 18 circumstellar disks observed by the DSHARP program: DoAr 25, Elias 2-27, GW Lup, HD 143006, HD 163296, IM Lup, Sz 129, and WaOph 6. Most of the kinks are detected over a small range...

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Bibliographic Details
Published in:Astrophysical journal. Letters Vol. 890; no. 1; p. L9
Main Authors: Pinte, C., Price, D. J., Ménard, F., Duchêne, G., Christiaens, V., Andrews, S. M., Huang, J., Hill, T., van der Plas, G., Perez, L. M., Isella, A., Boehler, Y., Dent, W. R. F., Mentiplay, D., Loomis, R. A.
Format: Journal Article
Language:English
Published: The American Astronomical Society 10.02.2020
Bristol : IOP Publishing
IOP Publishing
Subjects:
1241
1300
1647
Astrophysics
Astrophysics - Earth and Planetary Astrophysics
Astrophysics - Solar and Stellar Astrophysics
Astrophysics of Galaxies
Aérospatiale, astronomie & astrophysique
Physical, chemical, mathematical & earth Sciences
Physique, chimie, mathématiques & sciences de la terre
Planet formation
Protoplanetary disks
Sciences of the Universe
Space science, astronomy & astrophysics
Submillimeter astronomy
Astrophysics - Astrophysics of Galaxies
Submillimeter astronomy
Protoplanetary disks
Astrophysics - Earth and Planetary Astrophysics
Planet formation
Astrophysics - Solar and Stellar Astrophysics
ISSN:2041-8205, 0004-637X, 1538-4357, 2041-8213
Online Access:Get full text
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Summary:We present evidence for localized deviations from Keplerian rotation, i.e., velocity "kinks," in 8 of the 18 circumstellar disks observed by the DSHARP program: DoAr 25, Elias 2-27, GW Lup, HD 143006, HD 163296, IM Lup, Sz 129, and WaOph 6. Most of the kinks are detected over a small range in both radial extent and velocity, suggesting a planetary origin, but for some of them foreground contamination prevents us from measuring their spatial and velocity extent. Because of the DSHARP limited spectral resolution and signal to noise in the 12CO J = 2−1 line, as well as cloud contamination, the kinks are usually detected in only one spectral channel, and will require confirmation. The strongest circumstantial evidence for protoplanets in the absence of higher spectral resolution data and additional tracers is that, upon deprojection, we find that all of the candidate planets lie within a gap and/or at the end of a spiral detected in dust continuum emission. This suggests that a significant fraction of the dust gaps and spirals observed by Atacama Large Millimeter/submillimeter Array in disks are caused by embedded protoplanets.
Bibliography:AAS20735
scopus-id:2-s2.0-85081325000
ISSN:2041-8205
0004-637X
1538-4357
2041-8213
DOI:10.3847/2041-8213/ab6dda