Radiation hydrodynamic simulations of line-driven disk winds for ultra-fast outflows

Publications of the Astronomical Society of Japan

Nomura, Mariko²  Wada, Keiichi³  Takahashi, Hiroyuki R.¹  Yoshida, Tessei¹  Ohsuga, Ken⁴ 

[1] National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan;University of Tsukuba, Center for Computational Sciences, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan;Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065, Japan;National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanSchool of Physical Sciences, Graduate University of Advanced Study (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193, Japan

关键词: accretion;    "accretion disks—galaxies: active—methods: numerical";   

DOI  :  10.1093/pasj/psv124

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Usingtwo-dimensionalradiationhydrodynamicsimulations,weinvestigatetheoriginoftheultra-fastoutflows(UFOs)thatareoftenobservedinluminousactivegalacticnuclei(AGNs).Wefoundthattheradiationforceduetothespectrallinesgeneratesstrongwinds(line-drivendiskwinds)thatarelaunchedfromtheinnerregionofaccretiondisks(∼30Schwarzschildradii).Awiderangeofblackholemasses(MBH)andEddingtonratios(ε)wasinvestigatedtostudytheconditionscausingtheline-drivenwinds.ForMBH=106–109 M⊙andε=0.1–0.7,funnel-shapeddiskwindsappear,inwhichdensematterisacceleratedoutwardwithanopeningangleof70°–80°andwith10%ofthespeedoflight.Ifweobservethewindalongitsdirection,thevelocity,thecolumndensity,andtheionizationstateareconsistentwiththoseoftheobservedUFOs.AslongasobscurationbythetorusdoesnotaffecttheobservationofX-raybands,theUFOscouldbestatisticallyobservedinabout13%–28%oftheluminousAGNs,whichisnotinconsistentwiththeobservedratio(∼40%).WealsofoundthattheresultsareinsensitivetotheX-rayluminosityandthedensityofthedisksurface.Thus,wecanconcludethatUFOscouldexistinanyluminousAGNs,suchasnarrow-lineSeyfert1sandquasarswithεgt;0.1,withwhichfastline-drivenwindsareassociated.

【 授权许可】

Unknown