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A super-resolution analysis of the DSHARP survey: Substructure is common in the inner 30 au

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cam.depositDate2021-12-19
cam.issuedOnline2021-11-03
cam.orpheus.success2021-12-20 - Embargo set during processing via Fast-track
dc.contributor.authorJennings, J
dc.contributor.authorBooth, RA
dc.contributor.authorTazzari, M
dc.contributor.authorClarke, CJ
dc.contributor.authorRosotti, GP
dc.contributor.orcidTazzari, Marco [0000-0003-3590-5814]
dc.contributor.orcidClarke, Catherine [0000-0003-4288-0248]
dc.date.accessioned2021-12-21T00:32:39Z
dc.date.available2021-12-21T00:32:39Z
dc.date.issued2022
dc.date.updated2021-12-19T21:40:48Z
dc.description.abstractThe DSHARP survey evidenced the ubiquity of substructure in the mm dust distribution of large, bright protoplanetary discs. Intriguingly, these datasets have yet higher resolution information that is not recovered in a CLEAN image. We first show that the intrinsic performance of the CLEAN algorithm is resolution-limited. Then analyzing all 20 DSHARP sources using the 1D, super-resolution code Frankenstein (frank), we accurately fit the 1D visibilities to a mean factor of 4.3 longer baseline than the Fourier transform of the CLEAN images and a factor of 3.0 longer baseline than the transform of the CLEAN component models. This yields a higher resolution brightness profile for each source, identifying new substructure interior to 30 au in multiple discs; resolving known gaps to be deeper, wider, and more structured; and known rings to be narrower and brighter. Across the survey, high contrast gaps are an average 14% wider and 44% deeper in the frank profiles relative to CLEAN, and high contrast rings are an average 26% narrower. Categorizing the frank brightness profiles into trends, we find that the relative scarcity of features interior to 30 au in the survey's CLEAN images is an artifact of resolving power, rather than an intrinsic rarity of inner disc (or compact disc) substructure. Finally the rings in the frank profiles are narrower than the previously inferred deconvolved widths, indicating smaller alpha / St ratios in the local gas disc.
dc.identifier.doi10.17863/CAM.79106
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331655
dc.language.isoeng
dc.publisherOxford University Press (OUP)
dc.publisher.departmentInstitute of Astronomy
dc.publisher.urlhttp://dx.doi.org/10.1093/mnras/stab3185
dc.rightsAll Rights Reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.subjectmethods: data analysis
dc.subjecttechniques: interferometric
dc.subjectradio continuum: planetary systems
dc.subjectsubmillimetre: general
dc.subjectsubmillimetre: planetary systems
dc.titleA super-resolution analysis of the DSHARP survey: Substructure is common in the inner 30 au
dc.typeArticle
prism.publicationDate2021
prism.publicationNameMonthly Notices of the Royal Astronomical Society
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (823823)
pubs.funder-project-idScience and Technology Facilities Council (ST/S000623/1)
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
pubs.licence-identifierapollo-deposit-licence-2-1
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1093/mnras/stab3185

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