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dc.contributor.authorZanazzi, J. J.
dc.contributor.authorLai, Dong
dc.date.accessioned2019-10-24T19:20:56Z
dc.date.available2019-10-24T19:20:56Z
dc.date.created2017-02-28 01:24
dc.date.issued2016-12-16
dc.identifieroai:arXiv.org:1612.05598
dc.identifierhttp://arxiv.org/abs/1612.05598
dc.identifier.urihttp://hdl.handle.net/20.500.12424/1032097
dc.description.abstractRecent SPH simulations by Martin et al. (2014) suggest a circumstellar gaseous disk may exhibit coherent eccentricity-inclination oscillations due to the tidal forcing of an inclined binary companion, in a manner that resembles Lidov-Kozai oscillations in hierarchical triple systems. We carry out linear stability analysis for the eccentricity growth of circumstellar disks in binaries, including the effects of gas pressure and viscosity and secular (orbital-averaged) tidal force from the inclined companion. We find that the growth of disk eccentricity depends on the dimensionless ratio ($S$) between $c_{\rm s}^2$ (the disk sound speed squared) and the tidal torque acting on the disk (per unit mass) from the companion. For $S\ll 1$, the standard Lidov-Kozai result is recovered for a thin disk annulus: eccentricity excitation occurs when the mutual inclination $I$ between the disk and binary lies between $39^\circ$ and $141^\circ$. As $S$ increases, the inclination window for eccentricity growth generally becomes narrower. For $S\gtrsim$ a few, eccentricity growth is suppressed for all inclination angles. Surprisingly, we find that for $S\sim 1$ and certain disk density/pressure profiles, eccentricity excitation can occur even when $I$ is much less than $39^\circ$.
dc.description.abstractComment: 9 pages, 6 figures, submitted to MNRAS
dc.subjectAstrophysics - Earth and Planetary Astrophysics
dc.titleLidov-Kozai Mechanism in Hydrodynamical Disks: Linear Stability Analysis
dc.typetext
ge.collectioncodeOAIDATA
ge.dataimportlabelOAI metadata object
ge.identifier.legacyglobethics:10671102
ge.identifier.permalinkhttps://www.globethics.net/gtl/10671102
ge.lastmodificationdate2017-02-28 01:24
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/1612.05598


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