Show simple item record

dc.contributor.authorEsau, Claire F.
dc.contributor.authorHarries, Tim J.
dc.contributor.authorBouvier, Jerome
dc.date.accessioned2015-04-14T10:34:36Z
dc.date.issued2014-07-17
dc.description.abstractWe present photometric and spectroscopic models of the Classical T Tauri star AA Tau. Photometric and spectroscopic variability present in observations of AA Tau is attributed to a magnetically induced warp in the accretion disc, periodically occulting the photosphere on an 8.2 d time-scale. Emission line profiles show signatures of both infall, attributed to magnetospherically accreting material, and outflow. Using the radiative transfer code TORUS, we have investigated the geometry and kinematics of AA Tau's circumstellar disc and outflow, which is modelled here as a disc wind. Photometric models have been used to constrain the aspect ratio of the disc, the offset angle of the magnetosphere dipole with respect to the stellar rotation axis, and the inner radius of the circumstellar disc. Spectroscopic models have been used to constrain the wind and magnetosphere temperatures, wind acceleration parameter, and mass-loss rate. We find that observations are best fitted by models with a mass accretion rate of 5 × 10-9 M⊙ yr-1, a dipole offset of between 10° and 20°, a magnetosphere that truncates the disc from 5.2 to 8.8R*, a mass-loss-rate to accretion-rate ratio of ∼0.1, a magnetosphere temperature of 8500-9000 K, and a disc-wind temperature of 8000 K. © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.en_GB
dc.description.sponsorshipScience and Technology Facilities Council (STFC)en_GB
dc.identifier.citationVol. 443 (3), pp. 1022 - 1043en_GB
dc.identifier.doi10.1093/mnras/stu1211
dc.identifier.grantnumberST/J001627/1en_GB
dc.identifier.urihttp://hdl.handle.net/10871/16793
dc.language.isoenen_GB
dc.publisherOxford University Press for Royal Astronomical Societyen_GB
dc.subjectAccretion accretion discsen_GB
dc.subjectStars: individual: AA Tauen_GB
dc.subjectStars: magnetic fielden_GB
dc.subjectStars: pre-main-sequenceen_GB
dc.subjectStars: variables: T Taurien_GB
dc.titleLine and continuum radiative transfer modelling of AA Tauen_GB
dc.typeArticleen_GB
dc.date.available2015-04-14T10:34:36Z
dc.identifier.issn0035-8711
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en_GB
dc.identifier.eissn1365-2966
dc.identifier.journalMonthly Notices of the Royal Astronomical Societyen_GB


Files in this item

This item appears in the following Collection(s)

Show simple item record