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低質量 X 線連星における元素合成

X-ray burst. 6000. 4000. X-ray flux (cts/s). 2000. 0. 500. 600. 700. 800. 900. Time (s). 低質量 X 線連星における元素合成. 低質量 X 線連星（ X 線バースト天体）における元素合成. 青山学院大学　　山崎　徹. Artist View:. Neutron Star. Donor Star (“normal” star). Observed:. Rapid proton process????. Accretion Disk.

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低質量 X 線連星における元素合成

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  1. X-ray burst 6000 4000 X-ray flux (cts/s) 2000 0 500 600 700 800 900 Time (s) 低質量X線連星における元素合成 低質量X線連星（X線バースト天体）における元素合成 青山学院大学　　山崎　徹 Artist View: Neutron Star Donor Star(“normal” star) Observed: Rapid proton process???? Accretion Disk Neutron stars:1.4 Mo, 10 km radius(average density: ~ 1014 g/cm3)

  2. rp process models: Typical reaction flows Schatz et al. 2001 (M. Ouellette) Phys. Rev. Lett. 68 (2001) 3471 rp process:41Sc+p 42Ti +p 43V +p 44Cr44Cr 44V+e++ne44V+p … 陽子捕獲とβ+崩壊の競合 Proton number ap process:14O+a 17F+p17F+p 18Ne18Ne+a … αと陽子捕獲の競合 3a reactiona+a+a12C Neutron number

  3. 68Se Abundance = X-ray burst: (erg/g/s) cycle • luminosity luminosity 64Ge 104Sn • Abundances of waiting points 56Ni abundance 72Kr 1H • H, He abundance fuel abundance 4He time (s)

  4. 量が多く、比較的寿命の短い不安定核は？？ X線バーストにおいて多くできる不安定核の 　　　　　　半減期はほとんど数十秒。 64Ge (63.7s), 68Se (35.5s), 72Kr (17.2s), 104Sn (20.8s) 不安定核の絶対量からどれほどの核ガンマ線 　　　　　　　　　　がでるか？？？ 1回の観測(100ks)につき 10回弱のバースト？ ～１０４３（コ） , ｄ＝４（kpc) そのうちNeXTで検出される核ガンマ線の 　　　　　フラックスはどの程度か？

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