Ra Losa et al 2000 VLA YusefZadeh and

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銀河中心領域のフィラメント構造 Ra. Losa et al (2000) VLA Yusef-Zadeh and Morris 1987

銀河中心領域のフィラメント構造 Ra. Losa et al (2000) VLA Yusef-Zadeh and Morris 1987

降着円盤の大局的3次元MHD シミュレーション Initial Condition :β=1 Machida et al. 2000

降着円盤の大局的3次元MHD シミュレーション Initial Condition :β=1 Machida et al. 2000

Application to Sgr. A* (Machida et al. 2007 in prep) 43 GHz 690 GHz

Application to Sgr. A* (Machida et al. 2007 in prep) 43 GHz 690 GHz τ=1 surface (3 Dview) 1 AU

銀河ガス円盤のMHDシミュレーション Nishikori, H. , Machida, M. , and Matsumoto, R. , Ap. J 641,

銀河ガス円盤のMHDシミュレーション Nishikori, H. , Machida, M. , and Matsumoto, R. , Ap. J 641, 862 (2006)

渦状銀河の平均磁場:起源はダイナモ? M 51 (Neininger & Horellou, 1996) Our Galaxy (Han et al. , 2002)

渦状銀河の平均磁場:起源はダイナモ? M 51 (Neininger & Horellou, 1996) Our Galaxy (Han et al. , 2002)

磁気回転不安定性(MRI) Angular momentum MRI in differentially rotating disks (Balbus and Hawley 1991)

磁気回転不安定性(MRI) Angular momentum MRI in differentially rotating disks (Balbus and Hawley 1991)

velosity Loop形成のメカニズム velosity position Color: 12 CO Contour: 13 CO(white) position B=100μG 体積=100pc3 個数密度 n= 15

velosity Loop形成のメカニズム velosity position Color: 12 CO Contour: 13 CO(white) position B=100μG 体積=100pc3 個数密度 n= 15 0 cm-3   Emag = 1052 erg アルフベン速度 VA = 24 km s-1

2 D MHD simulations of Parker instability Fukui et al. (2006)

2 D MHD simulations of Parker instability Fukui et al. (2006)

Formation of magnetic loops Magnetic loop structure : plasma β=1   Hight : 400 pc   Length

Formation of magnetic loops Magnetic loop structure : plasma β=1   Hight : 400 pc   Length : 1 kpc   Inclination angle: 40度  Magnetic loops are created where the gas density becomes lower than the region outside the loop. Yellow: Isosurface of β=1  Blue: Magnetic field strength

星間ガスの熱不安定性 圧力 10000 K cooling heating Inoue, Inutsuka, Koyama 2006 30 K 個数密度

星間ガスの熱不安定性 圧力 10000 K cooling heating Inoue, Inutsuka, Koyama 2006 30 K 個数密度

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