{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,14]],"date-time":"2025-04-14T13:13:29Z","timestamp":1744636409324,"version":"3.37.3"},"reference-count":48,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2020,2,12]],"date-time":"2020-02-12T00:00:00Z","timestamp":1581465600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/501100007916","name":"Swinburne","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100007916","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,4,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:p>The interaction between a YSO stellar magnetic field and its protostellar disc can result in stellar accretional flows and outflows from the inner disc rim. Gas flows with a velocity component perpendicular to disc mid-plane subject particles to centrifugal acceleration away from the protostar, resulting in particles being catapulted across the face of the disc. The ejected material can produce a \u2018dust fan\u2019, which may be dense enough to mimic the appearance of a \u2018puffed-up\u2019 inner disc rim. We derive analytical equations for the time-dependent disc toroidal field, the disc magnetic twist, the size of the stable toroidal disc region, the jet speed, and the disc region of maximal jet flow speed. We show how the observed infrared variability of the pre-transition disc system LRLL\u00a031 can be modelled by a dust ejecta fan from the inner-most regions of the disc whose height is partially dependent on the jet flow speed. The greater the jet flow speed, the higher is the potential dust fan scale height. An increase in mass accretion on to the star tends to increase the height and optical depth of the dust ejection fan, increasing the amount of 1\u20138\u00a0\u00b5m radiation. The subsequent shadow reduces the amount of light falling on the outer disc and decreases the 8\u201340\u00a0\u00b5m radiation. A decrease in the accretion rate reverses this scenario, thereby producing the observed \u2018see-saw\u2019 infrared variability.<\/jats:p>","DOI":"10.1093\/mnras\/staa402","type":"journal-article","created":{"date-parts":[[2020,2,11]],"date-time":"2020-02-11T12:09:41Z","timestamp":1581422981000},"page":"4022-4038","source":"Crossref","is-referenced-by-count":7,"title":["Infrared variability due to magnetic pressure-driven jets, dust ejection and quasi-puffed-up inner rims"],"prefix":"10.1093","volume":"493","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4660-0162","authenticated-orcid":false,"given":"Kurt","family":"Liffman","sequence":"first","affiliation":[{"name":"Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3018, Australia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3993-2257","authenticated-orcid":false,"given":"Geoffrey","family":"Bryan","sequence":"first","affiliation":[{"name":"Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3018, Australia"}]},{"given":"Mark","family":"Hutchison","sequence":"first","affiliation":[{"name":"Center for Space and Habitability, University of Bern, Gesellschaftsstrasse 6, 3012 Bern, Switzerland"},{"name":"Institute for Computational Science, University of Z\u00fcrich, Winterthurerstrasse 190, 8057 Z\u00fcrich, Switzerland"}]},{"given":"Sarah T","family":"Maddison","sequence":"first","affiliation":[{"name":"Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3018, Australia"}]}],"member":"286","published-online":{"date-parts":[[2020,2,12]]},"reference":[{"key":"2020031405473602400_bib1","doi-asserted-by":"publisher","first-page":"55","DOI":"10.1088\/0004-637X\/744\/1\/55","volume":"744","author":"Adams","year":"2012","journal-title":"ApJ"},{"key":"2020031405473602400_bib2","doi-asserted-by":"publisher","first-page":"100","DOI":"10.1088\/0004-637X\/758\/2\/100","volume":"758","author":"Bans","year":"2012","journal-title":"ApJ"},{"key":"2020031405473602400_bib3","first-page":"479","volume-title":"Protostars and Planets V","author":"Bouvier","year":"2007"},{"key":"2020031405473602400_bib4","doi-asserted-by":"publisher","first-page":"179","DOI":"10.1146\/annurev-earth-050212-124203","volume":"42","author":"Brownlee","year":"2014","journal-title":"Annu. Rev. Earth Planet. Sci."},{"key":"2020031405473602400_bib5","first-page":"3879","volume":"489","author":"Bryan","year":"2019","journal-title":"MNRAS"},{"key":"2020031405473602400_bib6","doi-asserted-by":"publisher","first-page":"31","DOI":"10.1046\/j.1365-8711.1998.01576.x","volume":"299","author":"Campbell","year":"1998","journal-title":"MNRAS"},{"key":"2020031405473602400_bib7","doi-asserted-by":"publisher","first-page":"135","DOI":"10.1017\/S1743921307009490","volume-title":"IAU Symp. Vol. 243, Star-Disk Interaction in Young Stars","author":"Carr","year":"2007"},{"key":"2020031405473602400_bib8","doi-asserted-by":"publisher","first-page":"441","DOI":"10.1088\/0004-637X\/717\/1\/441","volume":"717","author":"Espaillat","year":"2010","journal-title":"ApJ"},{"key":"2020031405473602400_bib9","doi-asserted-by":"publisher","first-page":"497","DOI":"10.2458\/azu_uapress_9780816531240-ch022","volume-title":"Protostars and Planets VI","author":"Espaillat","year":"2014"},{"key":"2020031405473602400_bib10","doi-asserted-by":"publisher","first-page":"1733","DOI":"10.1088\/0004-637X\/719\/2\/1733","volume":"719","author":"Flaherty","year":"2010","journal-title":"ApJ"},{"key":"2020031405473602400_bib11","doi-asserted-by":"publisher","first-page":"83","DOI":"10.1088\/0004-637X\/732\/2\/83","volume":"732","author":"Flaherty","year":"2011","journal-title":"ApJ"},{"key":"2020031405473602400_bib12","doi-asserted-by":"crossref","DOI":"10.1017\/CBO9781139164245","volume-title":"Accretion Power in Astrophysics","author":"Frank","year":"2002","edition":"third edn"},{"key":"2020031405473602400_bib13","first-page":"366","volume":"146","author":"Friedjung","year":"1985","journal-title":"A&A"},{"key":"2020031405473602400_bib14","doi-asserted-by":"publisher","first-page":"L83","DOI":"10.1086\/182734","volume":"223","author":"Ghosh","year":"1978","journal-title":"ApJ"},{"volume-title":"Accretion Processes in Star Formation","year":"1998","author":"Hartmann","key":"2020031405473602400_bib15"},{"volume-title":"Hypersonic Flow Theory","year":"1959","author":"Hayes","key":"2020031405473602400_bib16"},{"key":"2020031405473602400_bib18","doi-asserted-by":"publisher","first-page":"1242","DOI":"10.1111\/j.1365-2966.2006.11208.x","volume":"374","author":"Juh\u00e1sz","year":"2007","journal-title":"MNRAS"},{"key":"2020031405473602400_bib17","doi-asserted-by":"publisher","first-page":"118","DOI":"10.1088\/0004-637X\/744\/2\/118","volume":"744","author":"Juh\u00e1sz","year":"2012","journal-title":"ApJ"},{"key":"2020031405473602400_bib19","doi-asserted-by":"publisher","first-page":"673","DOI":"10.1111\/j.1365-2966.2008.13094.x","volume":"386","author":"Kulkarni","year":"2008","journal-title":"MNRAS"},{"key":"2020031405473602400_bib20","doi-asserted-by":"publisher","first-page":"949","DOI":"10.1086\/589822","volume":"683","author":"Lai","year":"2008","journal-title":"ApJ"},{"key":"2020031405473602400_bib21","doi-asserted-by":"publisher","first-page":"4636","DOI":"10.1038\/s41467-018-07143-8","volume":"9","author":"Lee","year":"2018","journal-title":"Nat. Commun."},{"key":"2020031405473602400_bib22","doi-asserted-by":"publisher","first-page":"443","DOI":"10.1046\/j.1365-8711.1999.02852.x","volume":"309","author":"Liffman","year":"1999","journal-title":"MNRAS"},{"key":"2020031405473602400_bib23","doi-asserted-by":"publisher","first-page":"629","DOI":"10.1093\/mnras\/290.4.629","volume":"290","author":"Liffman","year":"1997","journal-title":"MNRAS"},{"key":"2020031405473602400_bib24","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1086\/191132","volume":"62","author":"Lovelace","year":"1986","journal-title":"ApJS"},{"key":"2020031405473602400_bib25","doi-asserted-by":"publisher","first-page":"696","DOI":"10.1086\/170544","volume":"379","author":"Lovelace","year":"1991","journal-title":"ApJ"},{"key":"2020031405473602400_bib26","doi-asserted-by":"publisher","first-page":"244","DOI":"10.1093\/mnras\/275.2.244","volume":"275","author":"Lovelace","year":"1995","journal-title":"MNRAS"},{"key":"2020031405473602400_bib27","doi-asserted-by":"publisher","first-page":"167","DOI":"10.1111\/j.1365-2966.2004.08431.x","volume":"356","author":"Matt","year":"2005","journal-title":"MNRAS"},{"key":"2020031405473602400_bib28","doi-asserted-by":"publisher","first-page":"989","DOI":"10.1088\/0004-637X\/714\/2\/989","volume":"714","author":"Matt","year":"2010","journal-title":"ApJ"},{"key":"2020031405473602400_bib29","doi-asserted-by":"publisher","first-page":"L15","DOI":"10.1088\/0004-637X\/704\/1\/L15","volume":"704","author":"Muzerolle","year":"2009","journal-title":"ApJ"},{"key":"2020031405473602400_bib30","doi-asserted-by":"publisher","first-page":"622","DOI":"10.1086\/171462","volume":"392","author":"Newman","year":"1992","journal-title":"ApJ"},{"key":"2020031405473602400_bib31","doi-asserted-by":"publisher","first-page":"132","DOI":"10.1093\/mnras\/sty3066","volume":"483","author":"Petrov","year":"2019","journal-title":"MNRAS"},{"key":"2020031405473602400_bib32","doi-asserted-by":"publisher","first-page":"A51","DOI":"10.1051\/0004-6361\/201323322","volume":"564","author":"Pinilla","year":"2014","journal-title":"A&A"},{"key":"2020031405473602400_bib33","doi-asserted-by":"publisher","first-page":"L32","DOI":"10.1088\/2041-8205\/733\/2\/L32","volume":"733","author":"Poteet","year":"2011","journal-title":"ApJ"},{"key":"2020031405473602400_bib34","doi-asserted-by":"publisher","first-page":"L45","DOI":"10.1111\/j.1745-3933.2012.01254.x","volume":"423","author":"Price","year":"2012","journal-title":"MNRAS"},{"key":"2020031405473602400_bib35","first-page":"568","volume-title":"Problems of Hydrodynamics and Continuum Mechanics","author":"Probstein","year":"1968"},{"key":"2020031405473602400_bib36","doi-asserted-by":"publisher","first-page":"1802","DOI":"10.1111\/j.1365-2966.2009.15413.x","volume":"399","author":"Romanova","year":"2009","journal-title":"MNRAS"},{"key":"2020031405473602400_bib37","doi-asserted-by":"publisher","first-page":"94","DOI":"10.1016\/j.newast.2018.01.011","volume":"62","author":"Romanova","year":"2018","journal-title":"New Astron."},{"key":"2020031405473602400_bib38","doi-asserted-by":"publisher","first-page":"1828","DOI":"10.1016\/j.pss.2009.01.007","volume":"57","author":"Rosenqvist","year":"2009","journal-title":"Planet. Space Sci."},{"key":"2020031405473602400_bib39","doi-asserted-by":"publisher","first-page":"211","DOI":"10.1007\/BF00751238","volume":"73","author":"Sedlmayr","year":"1995","journal-title":"Space\u00a0Sci.\u00a0Rev."},{"key":"2020031405473602400_bib40","doi-asserted-by":"publisher","first-page":"1070","DOI":"10.1086\/529003","volume":"678","author":"Sitko","year":"2008","journal-title":"ApJ"},{"key":"2020031405473602400_bib41","doi-asserted-by":"publisher","first-page":"188","DOI":"10.1088\/0004-637X\/708\/1\/188","volume":"708","author":"Turner","year":"2010","journal-title":"ApJ"},{"key":"2020031405473602400_bib42","doi-asserted-by":"publisher","first-page":"1191","DOI":"10.1086\/324720","volume":"565","author":"Uzdensky","year":"2002","journal-title":"ApJ"},{"key":"2020031405473602400_bib43","doi-asserted-by":"publisher","first-page":"A117","DOI":"10.1051\/0004-6361\/201322008","volume":"566","author":"Vinkovi\u0107","year":"2014","journal-title":"A&A"},{"key":"2020031405473602400_bib44","doi-asserted-by":"publisher","first-page":"1049","DOI":"10.1086\/375415","volume":"591","author":"Whitney","year":"2003","journal-title":"ApJ"},{"key":"2020031405473602400_bib45","doi-asserted-by":"publisher","first-page":"1079","DOI":"10.1086\/379068","volume":"598","author":"Whitney","year":"2003","journal-title":"ApJ"},{"key":"2020031405473602400_bib46","doi-asserted-by":"publisher","first-page":"30","DOI":"10.1088\/0067-0049\/207\/2\/30","volume":"207","author":"Whitney","year":"2013","journal-title":"ApJS"},{"key":"2020031405473602400_bib47","doi-asserted-by":"publisher","first-page":"67","DOI":"10.1146\/annurev-astro-081710-102548","volume":"49","author":"Williams","year":"2011","journal-title":"ARA&A"},{"key":"2020031405473602400_bib48","doi-asserted-by":"publisher","first-page":"A99","DOI":"10.1051\/0004-6361\/201220168","volume":"550","author":"Zanni","year":"2013","journal-title":"A&A"}],"container-title":["Monthly Notices of the Royal Astronomical Society"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/academic.oup.com\/mnras\/article-pdf\/493\/3\/4022\/32905660\/staa402.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/academic.oup.com\/mnras\/article-pdf\/493\/3\/4022\/32905660\/staa402.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,3,14]],"date-time":"2020-03-14T09:47:55Z","timestamp":1584179275000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/mnras\/article\/493\/3\/4022\/5734517"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,2,12]]},"references-count":48,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2020,4,11]]}},"URL":"https:\/\/doi.org\/10.1093\/mnras\/staa402","relation":{},"ISSN":["0035-8711","1365-2966"],"issn-type":[{"type":"print","value":"0035-8711"},{"type":"electronic","value":"1365-2966"}],"subject":[],"published-other":{"date-parts":[[2020,4]]},"published":{"date-parts":[[2020,2,12]]}}}