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SN 1997ff

SN 1997ff. 阿帕奇波因特天文台. SDSS SURVEY. （斯隆数字巡天望远镜）. SuperNova / Acceleration Probe Studying the Dark Energy of the Universe. SNAP. Discovery SNe 3826 （ 2006-10 ）. Years Number 1885 to 1988 661 To 2000 （ 178 ） 1824

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SN 1997ff

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  1. SN 1997ff

  2. 阿帕奇波因特天文台

  3. SDSS SURVEY （斯隆数字巡天望远镜）

  4. SuperNova / Acceleration Probe Studying the Dark Energy of the Universe SNAP

  5. Discovery SNe 3826（2006-10） • Years Number • 1885 to 1988 661 To 2000 （178） 1824 • 2001 （307） 2122 • 2002 （334） 2456 • 2003 （338） 2782 • 2004 （249） 3031 • 2005 （367） 3398 • 2006-10 (363) 3826

  6. Classification of supernovae-Based on spectroscopy II(classical:P-Cygni) II (dw:emission) II Core collapse of massive stars H Ib (strong He) Ic (weak He) SNe SNe No H Thermonuclear explosion of white dwarfs I Ia (strong Si)

  7. Anatomy of a Supernova Need Boltzmann Solution • Need Angular Distribution • Need Spectrum • Need Neutrino Distribution • Fluid Instabilities • Rotation • Magnetic Fields 6D RMHD Problem! Need these to few percent accuracy!

  8. 天文学家最近发现的东西对数十年来天文学界的传统观念提出了挑战：看来宇宙比人们过去所认为的更大，也更空虚。事实上宇宙的膨胀可能正在加快。 正如超新星的观测所显示的那样，宇宙的膨胀放慢的速率较低，意味着宇宙中总的物质密度较低。超新星的观测结果似乎要求膨胀真的是随时间而加速。如果一种奇异能量充满了空间的所有地方，那么膨胀就可能加速。--R Kirshner 物质告诉时空如何弯曲，而时空则告诉物质如何运动。Mass tells space how curve Space tells mass how move J.A.Wheeler ——

  9. Hubble’s Law

  10. 星系红移示例 室女团 大熊星系团 北冕星系团 牧夫 武仙

  11. 倘若宇宙正在減速膨胀，那末超新星会比预期来得近，因而较为耀眼﹔倘若宇宙正在減速膨胀，那末超新星会比预期来得近，因而较为耀眼﹔ 但是，如果宇宙加速膨胀，超新星則会较远，因而较为黯淡。

  12. 1995年ＡＳＣＡ发现SN 1006Ｘ射线同步辐射的亮弧(Koyama et al. 1995, Nature 378, 255)１９９８年用Cangaroo发现TeVγ射线辐射，证明存在能量为100 TeV.的电子 (Tanimori et al. 1998, ApJ 497, L33)

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