Super-Eddington Black-Hole Models for SS 433

Publications of the Astronomical Society of Japan

Okuda, Toru¹ 

[1] Hakodate College, Hokkaido University of Education, 1-2 Hachiman-cho, Hakodate 040-8567

关键词: "accretion;    accretion disks";    "black hole physics";    convection;    hydrodynamics;    "stars: individual (SS 433)";   

DOI  :  10.1093/pasj/54.2.253

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Weexaminehighlysuper-Eddingtonblack-holemodelsforSS433,basedontwo-dimensionalhydrodynamicalcalculationscoupledwithradiationtransport.Thesuper-Eddingtonaccretionflowwithasmallviscosityparameter,$$alpha=10^{-3}$$,resultsinageometrically–andoptically-thickdiskwithalargeopeningangleof$$sim60^{circ}$$totheequatorialplaneandaveryrarefied,hot,andoptically-thinhigh-velocityjetsregionaroundthedisk.Thethickaccretionflowconsistsoftwodifferentzones:aninneradvection-dominatedzoneandanouterconvection-dominatedzone.Thehigh-velocityregionaroundthediskisdividedintotwocharacteristicregions,averyrarefiedfunnelregionalongtherotationalaxisandamoderatelyrarefiedhigh-velocityregionoutsideofthedisk.Thetemperaturesof$$sim10^7,mathrm{K}$$andthedensitiesof$$sim10^{-7},mathrm{g},mathrm{cm}^{-3}$$intheupperdiskvarysharplyto$$sim10^8,mathrm{K}$$and$$10^{-8},mathrm{g},mathrm{cm}^{-3}$$,respectively,acrossthediskboundarybetweenthediskandthehigh-velocityregion.TheX-rayemissionofironlineswouldbegeneratedonlyinaconfinedregionbetweenthefunnelwallandthephotosphericdiskboundary,whereflowsareacceleratedtorelativisticvelocitiesof$$sim0.2,c$$duetothedominantradiation-pressureforce.Theresultsarediscussedregardingthecollimationangleofthejets,thelargemass-outflowrateobservedinSS433,andtheADAFsandtheCDAFsmodels.

【 授权许可】

Unknown