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dc.contributor.author
Owen, James E.
dc.contributor.author
Hudoba de Badyn, Mathias
dc.contributor.author
Clarke, Cathie J.
dc.contributor.author
Robins, Luke
dc.date.accessioned
2021-03-11T13:24:58Z
dc.date.available
2021-03-10T21:48:26Z
dc.date.available
2021-03-11T13:24:58Z
dc.date.issued
2013-12
dc.identifier.issn
0035-8711
dc.identifier.issn
1365-2966
dc.identifier.issn
1365-8711
dc.identifier.other
10.1093/mnras/stt1663
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/473933
dc.description.abstract
We consider the properties of protoplanetary discs that are undergoing inside-out clearing by photoevaporation. In particular, we aim to characterize the conditions under which a protoplanetary disc may undergo ‘thermal sweeping’, a rapid (≲10^4 years) disc destruction mechanism proposed to occur when a clearing disc reaches sufficiently low surface density at its inner edge and where the disc is unstable to runaway penetration by the X-rays. We use a large suite of 1D radiation-hydrodynamic simulations to probe the observable parameter space, which is unfeasible in higher dimensions. These models allow us to determine the surface density at which thermal sweeping will take over the disc's evolution and to evaluate this critical surface density as a function of X-ray luminosity, stellar mass and inner hole radius. We find that this critical surface density scales linearly with X-ray luminosity, increases with inner hole radius and decreases with stellar mass, and we develop an analytic model that reproduces these results. This surface density criterion is then used to determine the evolutionary state of protoplanetary discs at the point that they become unstable to destruction by thermal sweeping. We find that transition discs created by photoevaporation will undergo thermal sweeping when their inner holes reach 20–40 au, implying that transition discs with large holes and no accretion (which were previously a predicted outcome of the later stages of all flavours of the photoevaporation model) will not form. Thermal sweeping thus avoids the production of large numbers of large, non-accreting holes (which are not observed) and implies that the majority of holes created by photoevaporation should still be accreting. We emphasize that the surface density criteria that we have developed apply to all situations where the disc develops an inner hole that is optically thin to X-rays. It thus applies not only to the case of holes originally created by photoevaporation but also to holes formed, for example, by the tidal influence of planets.
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press (OUP)
en_US
dc.title
Characterizing thermal sweeping: a rapid disc dispersal mechanism
en_US
dc.type
Journal Article
dc.date.published
2013-09-25
ethz.journal.title
Monthly Notices of the Royal Astronomical Society
ethz.journal.volume
436
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Mon. Not. R. Astron. Soc.
ethz.pages.start
1430
en_US
ethz.pages.end
1438
en_US
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02650 - Institut für Automatik / Automatic Control Laboratory::03751 - Lygeros, John / Lygeros, John
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02650 - Institut für Automatik / Automatic Control Laboratory::08814 - Smith, Roy (Tit.-Prof.)
en_US
ethz.date.deposited
2021-03-10T21:48:46Z
ethz.source
FORM
ethz.eth
no
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-03-11T13:25:10Z
ethz.rosetta.lastUpdated
2022-03-29T05:43:45Z
ethz.rosetta.versionExported
true
ethz.COinS
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