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dc.contributor.authorRafikov, Roman R.
dc.date.accessioned2019-10-24T19:16:54Z
dc.date.available2019-10-24T19:16:54Z
dc.date.created2017-02-28 01:23
dc.date.issued2012-12-10
dc.identifieroai:arXiv.org:1212.2217
dc.identifierhttp://arxiv.org/abs/1212.2217
dc.identifier.urihttp://hdl.handle.net/20.500.12424/1029952
dc.description.abstractCircumbinary planetary systems recently discovered by Kepler represent an important testbed for planet formation theories. Planetesimal growth in disks around binaries has been expected to be inhibited interior to ~10 AU by secular excitation of high relative velocities between planetesimals, leading to their collisional destruction (rather than agglomeration). Here we show that gravity of the gaseous circumbinary disk in which planets form drives fast precession of both the planetesimal and binary orbits, resulting in strong suppression of planetesimal eccentricities beyond 2-3 AU and making possible growth of 1-100 km objects in this region. The precise location of the boundary of accretion-friendly region depends on the size of the inner disk cavity cleared by the binary torques and on the disk mass (even 0.01 M_Sun disk strongly suppresses planetesimal excitation), among other things. Precession of the orbit of the central binary, enhanced by the mass concentration naturally present at the inner edge of a circumbinary disk, plays key role in this suppression, which is a feature specific to the circumbinary planet formation.
dc.description.abstractComment: 6 pages, 2 figures, submitted to ApJL
dc.subjectAstrophysics - Earth and Planetary Astrophysics
dc.titleHow to build Tatooine: reducing secular excitation in Kepler circumbinary planet formation
dc.typetext
ge.collectioncodeOAIDATA
ge.dataimportlabelOAI metadata object
ge.identifier.legacyglobethics:10668775
ge.identifier.permalinkhttps://www.globethics.net/gtl/10668775
ge.lastmodificationdate2017-02-28 01:23
ge.lastmodificationuseradmin@pointsoftware.ch (import)
ge.submissions0
ge.oai.exportid149001
ge.oai.repositoryid58
ge.oai.setnameAstrophysics
ge.oai.setspecphysics:astro-ph
ge.oai.streamid5
ge.setnameGlobeTheoLib
ge.setspecglobetheolib
ge.linkhttp://arxiv.org/abs/1212.2217


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