Smoothed Particle Hydrodynamics Coupled with Radiation Transfer

Publications of the Astronomical Society of Japan

Susa, Hajime¹ 

[1]Department of Physics, Rikkyo University, Nishi-Ikebukuro, Toshimaku, Tokyo 171-8501

关键词: "cosmology: theory";    "first stars";    "Galaxy: formation";    hydrodynamics;    "methods: numerical";    "radiation transfer";   

DOI  :  10.1093/pasj/58.2.445

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Wehaveconstructedabrand-newradiationhydrodynamicssolverbaseduponSmoothedParticleHydrodynamics,whichworksonaparallelcomputersystem.Thecodeisdesignedtoinvestigatetheformationandevolutionoffirst-generationobjectsat$$zgtrsim10$$,wheretheradiativefeedbackfromvarioussourcesplaysimportantroles.Thecodecancomputethefractionofchemicalspeciese,$$mathrm{H}^{+}$$,H,$$mathrm{H}^{-},mathrm{H}_2$$,and$$mathrm{H}_2^{+}$$byfullyimplicittimeintegration.Italsocandealwithmultiplesourcesofionizingradiation,aswellasradiationatLyman–Wernerband.Wecomparetheresultsforafewtestcalculationswiththeresultsofone-dimensionalsimulations,inwhichwefindgoodagreementswitheachother.Wealsoevaluatethespeedupbyparallelization,whichisfoundtobealmostideal,aslongasthenumberofsourcesiscomparabletothenumberofprocessors.

【 授权许可】

Unknown