RADIOACTIVE AL-26 FROM MASSIVE STARS - PRODUCTION AND DISTRIBUTION IN THE GALAXY

被引：43
作者：
PRANTZOS, N [1 ]
机构：
[1] CENS,SERV ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE
来源：
ASTROPHYSICAL JOURNAL | 1993年 / 405卷 / 02期
关键词：
GAMMA-RAYS; THEORY; NUCLEAR REACTIONS; NUCLEOSYNTHESIS; ABUNDANCES; SUPERNOVAE; GENERAL;
D O I：
10.1086/186764
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Recent models of stellar nucleosynthesis suggest that massive stars are probably the main contributors of radioactive Al-26 in the Galaxy. In that case the angular distribution of the corresponding 1.8 MeV emission should trace, to some extent, the Galactic spiral arms, presumed site of massive star formation. Numerical simulations of the expected emissivity profile as a function of Galactic longitude are presented, taking into account plausible source distributions and a realistic spiral pattern for our Galaxy. The recently reported observations of the COMPTEL instrument aboard the Compton Observatory are discussed in light of those results.
引用
收藏
页码：L55 / L58
页数：4
相关论文
共 27 条
  • [1] BARTUNOV OS, 1992, ASTRON ASTROPHYS, V264, P428
  • [2] CASSE M, 1993, IN PRESS ORIGIN EVOL
  • [3] CASWELL JL, 1987, ASTRON ASTROPHYS, V171, P261
  • [4] AL-26 IN THE INTERSTELLAR-MEDIUM
    CLAYTON, DD
    LEISING, MD
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1987, 144 (01): : 1 - +
  • [5] AL-26 IN THE INTERSTELLAR-MEDIUM
    CLAYTON, DD
    [J]. ASTROPHYSICAL JOURNAL, 1984, 280 (01) : 144 - 149
  • [6] DIEHL R, 1993, IN PRESS A AS
  • [7] DIEHL R, 1993, IN PRESS COMPTON OBS
  • [8] Downes D., 1980, Astronomy & Astrophysics Supplement Series, V40, P379
  • [9] GEORGELIN YM, 1976, ASTRON ASTROPHYS, V49, P57
  • [10] GUSTEN R, 1989, IAU S, V136, P89
123