Core Collapse And Supernova Explosion Of Massive Star Having Magnetic Field Inclined To The Rotation AxisHayato Mikami (Chiba Univ.)Collaborators: Yuji Sato(Chiba Univ.),Tomoyuki Hanawa(Chiba Univ.),and Tomoaki Matsumoto(Hosei Univ.)

IntroductionType-II supernovaeAsymmetric explosions2D MHD simulation(Sawai et al. 2004, Ardeljan et al. 2005)The 3D effect by the magnetic field inclined to the core rotation axisMagnetic field configurationDirection of outflowDependence on the initial and B

Initial model0 = 6.8109 g cm-315 Mo model (Woosley et al. 2002)6000 km

Initial model0 = 6.8109 g cm-30 = 0.15 - 1.2 rad s-1Differential rotation

Initial model0 = 6.8109 g cm-30 = 0.15 - 1.2 rad s-1B0 = 0.25 - 4.01012 GDipole-likeUniform near the central region

Initial model0 = 6.8109 g cm-3 0 = 0.15 - 1.2 rad s-1B0 = 0.25 - 4.01012 G0 = 600

ParametersInitial rotation 0Initial magnetic field B0

The calculation methodIdeal MHD equationsEOS(Takahara & Sato, 1984)The phenomenological parametricP = Pthermal + PcoldPcold = KNested grid methodRoe method modified with the care for the Carbuncle instabilityNumerical Viscosity to Care the Carbuncle Instability (Hanawa,11/3)

Parameters

Overview230 mst=0 ms

OverviewCore collapse (189 ms)After bounce (41 ms)Jets206 msThe next movie

3D movielines - Magnetic fields - proto neutronstar ( > 1014 cm s-1 ) - outflow ( vr > 109 cm s-1 )

185 ms < t < 230 ms400 kmThe initial parameters0 = 1.22 s-1B0 = 3.041012 G0B0

Time evolution of Energy (R

Emag was stored on R=10 & 60 kmEnhanced by the core rotationNS10 km60 kmEmag (erg)206 msJets

Jet launched at R=60 km206 ms109 cm s-1NS10 km60 kmJets

2D movie (187 < t < 230 ms)200 km40 km187 ms00B0B0

Layers of neutral sheets

Jets launched from R=60 km

Dependence on the initial Fast 0 produced fast jetFast 0 modelSlow 0 modelFaster

Dependence on the initial BFasterStrong B0 produced fast jet.Strong B0 modelWeak B0 model

ConclusionNeutral sheets: new feature in 3DEmag is stored on the sphere of R=10 and 60 km.JetsDirection of jets is along the rotation axis.Jets are launched from R=60 km.Fast 0 produce fast jets.Strong B0 produce fast jets.