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dc.contributor.authorJuhász, Aen
dc.contributor.authorFacchini, Sen
dc.date.accessioned2017-03-16T13:58:24Z
dc.date.available2017-03-16T13:58:24Z
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/263122
dc.description.abstractIn recent years, an increasing number of observational studies have hinted at the presence of warps in protoplanetary discs; however, a general comprehensive description of observational diagnostics of warped discs was missing. We performed a series of 3D smoothed particle hydrodynamic simulations and combined them with 3D radiative transfer calculations to study the observability of warps in circumbinary discs, whose plane is misaligned with respect to the orbital plane of the central binary. Our numerical hydrodynamic simulations confirm previous analytical results on the dependence of the warp structure on the viscosity and the initial misalignment between the binary and the disc. To study the observational signatures of warps, we calculate images in the continuum at near-infrared and submillimetre wavelengths and in the pure rotational transition of CO in the submillimetre. Warped circumbinary discs show surface brightness asymmetry in near-infrared scattered light images as well as in optically thick gas lines at submillimetre wavelengths. The asymmetry is caused by self-shadowing of the disc by the inner warped regions, thus the strength of the asymmetry depends on the strength of the warp. The projected velocity field, derived from line observations, shows characteristic deviations, twists and a change in the slope of the rotation curve, from that of an unperturbed disc. In extreme cases even the direction of rotation appears to change in the disc inwards of a characteristic radius. The strength of the kinematical signatures of warps decreases with increasing inclination. The strength of all warp signatures decreases with decreasing viscosity.
dc.description.sponsorshipThis work has been supported by the DISCSIM project, grant agreement 341137 funded by the European Research Council under ERC-2013-ADG.
dc.language.isoenen
dc.publisherOxford University Press
dc.subjectaccretionen
dc.subjectaccretion discsen
dc.subjecthydrodynamicsen
dc.subjectprotoplanetary discsen
dc.subjectcircumstellar matteren
dc.titleObservational signatures of linear warps in circumbinary discsen
dc.typeArticle
prism.endingPage4073
prism.issueIdentifier4en
prism.publicationNameMonthly Notices of the Royal Astronomical Societyen
prism.startingPage4053
prism.volume466en
dc.identifier.doi10.17863/CAM.8427
dcterms.dateAccepted2016-12-30en
rioxxterms.versionofrecord10.1093/mnras/stw3389en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2016-12-30en
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen
cam.issuedOnline2017-01-07en


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