Notsu, S, Akiyama, E, Booth, A et al. (6 more authors) (2019) Dust Continuum Emission and the Upper Limit Fluxes of Submillimeter Water Lines of the Protoplanetary Disk around HD 163296 Observed by ALMA. Astrophysical Journal, 875 (2). 96. ISSN 0004-637X
Abstract
In this paper, we analyze the upper limit fluxes of submillimeter ortho-H2-16O 321 GHz, para-H2-18O 322 GHz, and HDO 335 GHz lines from the protoplanetary disk around the Herbig Ae star HD 163296, using the Atacama Large Millimeter/Submillimeter Array. These water lines are considered to be the best candidate submillimeter lines to locate the position of the H2O snowline, on the basis of our previous model calculations. We compare the upper limit fluxes with the values calculated by our models with dust emission included, and we constrain the line-emitting region and the dust opacity from the observations. We conclude that, if the outer edge of the region with a high water abundance and the position of the water snowline are both beyond 8 au, then themillimeter dust opacity κ mm will have a value larger than 2.0 cm2 g−1. In addition, the position of the water snowline must lie inside 20 au if the millimeter dust opacity κ mm is 2.0 cm2 g−1. Future observations of the dust continuum emission at higher angular resolution and submillimeter water lines with a longer observation time are required to clarify the detailed structures and the position of the H2O snowline in the disk midplane.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019. The American Astronomical Society. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. https://doi.org/10.3847/1538-4357/ab0ae9. |
Keywords: | astrochemistry; ISM: molecules; protoplanetary disks; stars: formation; stars: individual (HD 163296); 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) |
Funding Information: | Funder Grant number Science & Technology Facilities Council (STFC) ST/R000549/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 25 Apr 2019 10:03 |
Last Modified: | 25 Jun 2023 21:48 |
Status: | Published |
Publisher: | American Astronomical Society |
Identification Number: | 10.3847/1538-4357/ab0ae9 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:145305 |