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dc.contributor.authorLatter, Henrik
dc.contributor.authorRiols, Antoine
dc.date.accessioned2018-07-30T10:43:57Z
dc.date.available2018-07-30T10:43:57Z
dc.date.issued2018-06-01
dc.identifier.issn1365-2966
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/278532
dc.description.abstractSpiral density waves dominate several facets of accretion disc dynamics – planet-disc interactions and gravitational instability (GI) most prominently. Though they have been examined thoroughly in two-dimensional simulations, their vertical structures in the non-linear regime are somewhat unexplored. This neglect is unwarranted given that any strong vertical motions associated with these waves could profoundly impact dust dynamics, dust sedimentation, planet formation, and the emissivity of the disc surface. In this paper, we combine linear calculations and shearing box simulations in order to investigate the vertical structure of spiral waves for various polytropic stratifications and wave amplitudes. For sub-adiabatic profiles, we find that spiral waves develop a pair of counter-rotating poloidal rolls. Particularly strong in the non-linear regime, these vortical structures issue from the baroclinicity supported by the background vertical entropy gradient. They are also intimately connected to the disc's g modes which appear to interact non-linearly with the density waves. Furthermore, we demonstrate that the poloidal rolls are ubiquitous in gravitoturbulence, emerging in the vicinity of GI spiral wakes, and potentially transporting grains off the disc mid-plane. Other than hindering sedimentation and planet formation, this phenomena may bear on observations of the disc's scattered infrared luminosity. The vortical features could also impact on the turbulent dynamo operating in young protoplanetary discs subject to GI, or possibly even galactic discs.
dc.languageeng
dc.publisherOxford University Press
dc.subjectaccretion
dc.subjectaccretion discs
dc.subjectturbulence
dc.subjectwaves
dc.subjectprotoplanetary discs
dc.titleSpiral density waves and vertical circulation in protoplanetary discs
dc.typeArticle
prism.endingPage5126
prism.issueIdentifier4
prism.publicationDate2018
prism.publicationNameMonthly Notices of the Royal Astronomical Society
prism.startingPage5115
prism.volume476
dc.identifier.doi10.17863/CAM.25870
dcterms.dateAccepted2018-02-16
rioxxterms.versionofrecord10.1093/mnras/sty460
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-06-01
dc.identifier.eissn1365-2966
dc.publisher.urlhttps://academic.oup.com/mnras/article/476/4/5115/4919617
rioxxterms.typeJournal Article/Review
pubs.funder-project-idScience and Technology Facilities Council (ST/P000673/1)
pubs.funder-project-idScience and Technology Facilities Council (ST/L000636/1)
cam.issuedOnline2018-03-03
dc.identifier.urlhttps://academic.oup.com/mnras/article/476/4/5115/4919617
cam.orpheus.successThu Jan 30 13:01:28 GMT 2020 - The item has an open VoR version.
rioxxterms.freetoread.startdate2100-01-01


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