CHEMICAL EVOLUTION IN AN INHOMOGENEOUS INTERSTELLAR-MEDIUM

被引：0
|
作者：
WILMES, M [1 ]
KOPPEN, J [1 ]
机构：
[1] CHRISTIAN ALBRECHTS UNIV KIEL, INST THEORET PHYS & STERNWARTE, D-24118 KIEL, GERMANY
来源：
ASTRONOMY & ASTROPHYSICS | 1995年 / 294卷 / 01期
关键词：
GALAXY; ABUNDANCES; EVOLUTION; NUCLEOSYNTHESIS;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the chemical evolution of secondary and primary elements in a model which allows for inhomogeneities in the interstellar medium due to incomplete mixing of stellar ejecta, and a star formation localized in time and space. The average abundances are the same as the single value obtained from homogeneous models. The inhomogeneous star formation causes a scatter of the abundances of the ISM. Incomplete mixing has a strong influence on the relation between nitrogen and oxygen, giving rise to flatter N/O-O/H relations, thus mimicking a primary contribution to the nitrogen synthesis. Comparison with observational data from the Galaxy and external galaxies indicates that the probability of star formation is about T = 0.1, in accord with the scatter of stellar metallicities which indicates that the degree of chemical inhomogeneity of the interstellar gas is indeed rather small.
引用
收藏
页码：47 / 56
页数：10
相关论文
共 50 条
  • [1] THE EVOLUTION OF LOCAL INTERSTELLAR-MEDIUM
    KOSAREV, IB
    LOSEVA, TV
    NEMTCHINOV, IV
    POPEL, SI
    [J]. ASTRONOMY & ASTROPHYSICS, 1994, 287 (02) : 470 - 478
  • [2] STOCHASTIC-EVOLUTION OF REFRACTORY INTERSTELLAR DUST DURING THE CHEMICAL EVOLUTION OF A 2-PHASE INTERSTELLAR-MEDIUM
    LIFFMAN, K
    CLAYTON, DD
    [J]. ASTROPHYSICAL JOURNAL, 1989, 340 (02): : 853 - 868
  • [3] THE INTERSTELLAR-MEDIUM
    MILLAR, TJ
    WILLIAMS, DA
    [J]. SCIENCE PROGRESS, 1991, 75 (298) : 279 - 311
  • [4] EFFECTS OF OVERSHOOTING ON THE CHEMICAL ENRICHMENT OF THE INTERSTELLAR-MEDIUM
    GREGGIO, L
    TOSI, M
    [J]. ASTRONOMY & ASTROPHYSICS, 1986, 156 (1-2) : L1 - L4
  • [5] THE LOCAL INTERSTELLAR-MEDIUM
    COX, DP
    REYNOLDS, RJ
    [J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1987, 25 : 303 - 344
  • [6] LOCAL INTERSTELLAR-MEDIUM
    WALLIS, MK
    [J]. NATURE, 1975, 254 (5497) : 202 - 203
  • [7] ABUNDANCES IN THE INTERSTELLAR-MEDIUM
    WILSON, TL
    MATTEUCCI, F
    [J]. ASTRONOMY AND ASTROPHYSICS REVIEW, 1992, 4 (01): : 1 - 33
  • [8] EXPLOSIONS IN THE INTERSTELLAR-MEDIUM
    MCKEE, CF
    TRUELOVE, JK
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1995, 256 (1-3): : 157 - 172
  • [9] THE SUN AND THE INTERSTELLAR-MEDIUM
    PARESCE, F
    BOWYER, S
    [J]. SCIENTIFIC AMERICAN, 1986, 255 (03) : 93 - &
  • [10] LOCAL INTERSTELLAR-MEDIUM
    BOCHKAREV, NG
    [J]. ASTROPHYSICS AND SPACE SCIENCE, 1987, 138 (02) : 229 - 302
12345