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Revealing signatures of planets migrating in protoplanetary discs with ALMA multiwavelength observations
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Nazari, Pooneh, Booth, Richard A., Clarke, Cathie J., Rosotti, Giovanni P., Tazzari, Marco, Juhasz, Attila and Meru, Farzana (2019) Revealing signatures of planets migrating in protoplanetary discs with ALMA multiwavelength observations. Monthly Notices of the Royal Astronomical Society, 485 (4). pp. 5914-5923. doi:10.1093/mnras/stz836 ISSN 0035-8711.
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WRAP-revealing-signatures-planets-migrating-protoplanetary-discs-ALMA-multiwavelength-observations-Meru-2019.pdf - Accepted Version - Requires a PDF viewer. Download (1762Kb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnras/stz836
Abstract
Recent observations show that rings and gaps are ubiquitous in protoplanetary discs. These features are often interpreted as being due to the presence of planets; however, the effect of planetary migration on the observed morphology has not been investigated hitherto. In this work, we investigate whether multiwavelength mm/submm observations can detect signatures of planet migration, using 2D dusty hydrodynamic simulations to model the structures generated by migrating planets and synthesizing ALMA continuum observations at 850μm and 3mm. We identify three possible morphologies for a migrating planet: a slowly migrating planet is associated with a single ring outside the planet’s orbit, a rapidly migrating planet is associated with a single ring inside the planet’s orbit while a planet migrating at intermediate speed generates one ring on each side of the planet’s orbit. We argue that multiwavelength data can distinguish multiple rings produced by a migrating planet from other scenarios for creating multiple rings, such as multiple planets or discs with low viscosity. The signature of migration is that the outer ring has a lower spectral index, due to larger dust grains being trapped there. Of the recent ALMA observations revealing protoplanetary discs with multiple rings and gaps, we suggest that Elias 24 is the best candidate for a planet migrating in the intermediate speed regime.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
Publisher: | Oxford University Press | ||||||||
ISSN: | 0035-8711 | ||||||||
Official Date: | June 2019 | ||||||||
Dates: |
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Volume: | 485 | ||||||||
Number: | 4 | ||||||||
Page Range: | pp. 5914-5923 | ||||||||
DOI: | 10.1093/mnras/stz836 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Pooneh Nazari, Richard A Booth, Cathie J Clarke, Giovanni P Rosotti, Marco Tazzari, Attila Juhasz, Farzana Meru, Revealing signatures of planets migrating in protoplanetary discs with ALMA multiwavelength observations, Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 4, June 2019, Pages 5914–5923, https://doi.org/10.1093/mnras/stz836 is available online at: http://dx.doi.org/10.1093/mnras/stz836 | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 17 June 2019 | ||||||||
Date of first compliant Open Access: | 17 June 2019 | ||||||||
Related URLs: | |||||||||
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