Title : ( Equilibria of a Self-Gravitating, Rotating Disk Around a Magnetized Compact object )
Authors: Jamshid Ghanbari , Shahram Abbassi ,
Full TextAbstract
Weexaminetheeffectofself-gravityinarotatingthick-discequilibriuminthepresenceofadipolarmagneticfield.First,wefindaself-similarsolutionfornon-self-gravitatingdiscs.Thesolutionthatwehavefoundshowsthatthepressureanddensityequilibriumprofilesarestronglymodifiedbyaself-consistenttoroidalmagneticfield.Weintroducethreedimensionlessvariables,CB,CcandCt,whichindicatetherelativeimportanceoftoroidalcomponentofthemagneticfield(CB),andcentrifugal(Cc)andthermal(Ct)energywithrespecttothegravitationalpotentialenergyofthecentralobject.Westudytheeffectofeachoftheseonthestructureofthedisc.Secondly,weinvestigatetheeffectofself-gravityonthediscs;thus,weintroduceanotherdimensionlessvariable(Cg)whichshowstheimportanceofself-gravity.Wefindaself-similarsolutionfortheequationsofthesystem.Oursolutionshowsthatthestructureofthediscismodifiedbytheself-gravitationofthedisc,themagneticfieldofthecentralobjectandtheazimuthalvelocityofthegasdisc.Wefindthatself-gravityandmagnetismfromthecentralobjectcanchangethethicknessandtheshapeofthedisc.Weshowthatastheeffectofself-gravityincreasesthediscbecomesthinner.Wealsoshowthat,fordifferentvaluesofthestar’smagneticfieldandofthedisc’sazimuthalvelocity,thedisc’sshapeanditsdensityandpressureprofilesarestronglymodified.
Keywords
, accretion, accretion discs
@article{paperid:1038735,
author = {Ghanbari, Jamshid and Abbassi, Shahram},
title = {Equilibria of a Self-Gravitating, Rotating Disk Around a Magnetized Compact object},
journal = {Monthly Notices of the Royal Astronomical Society},
year = {2004},
volume = {4},
number = {350},
month = {February},
issn = {0035-8711},
pages = {1437--1444},
numpages = {7},
keywords = {accretion; accretion discs},
}
%0 Journal Article
%T Equilibria of a Self-Gravitating, Rotating Disk Around a Magnetized Compact object
%A Ghanbari, Jamshid
%A Abbassi, Shahram
%J Monthly Notices of the Royal Astronomical Society
%@ 0035-8711
%D 2004
