Nomura, H, Tsukagoshi, T, Kawabe, R et al. (8 more authors) (2016) ALMA Observations of a Gap and a Ring in the Protoplanetary Disk around TW Hya. The Astrophysical Journal, 819 (1). L7. ISSN 2041-8205
Abstract
We report the first detection of a gap and a ring in 336 GHz dust continuum emission from the protoplanetary disk around TW Hya, using the Atacama Large Millimeter/Submillimeter Array (ALMA). The gap and ring are located at around 25 and 41 au from the central star, respectively, and are associated with the CO snow line at ∼30 au. The gap has a radial width of less than 15 au and a mass deficit of more than 23%, taking into account that the observations are limited to an angular resolution of ∼15 au. In addition, the 13CO and C18O J=3-2 lines show a decrement in CO line emission throughout the disk, down to ∼10 au, indicating a freeze-out of gas-phase CO onto grain surfaces and possible subsequent surface reactions to form larger molecules. The observed gap could be caused by gravitational interaction between the disk gas and a planet with a mass less than super-Neptune (2{M}{{Neptune}}), or could be the result of the destruction of large dust aggregates due to the sintering of CO ice.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, The American Astronomical Society. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | molecular processes, planet, disk interactions, protoplanetary disks, stars: individual (TW Hya), submillimeter: planetary systems |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Nov 2016 16:27 |
Last Modified: | 19 Apr 2021 15:57 |
Published Version: | https://doi.org/10.3847/2041-8205/819/1/L7 |
Status: | Published |
Publisher: | American Astronomical Society |
Identification Number: | 10.3847/2041-8205/819/1/L7 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107110 |