Observational Tests for the Evolution of Massive Stars in Nearby Galaxies
Observational Tests for the Evolution of Massive Stars in Nearby Galaxies
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附近星系中大质量恒星演化的观测测试
DOI：
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发表时间：
1990
期刊：
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通讯作者：
C. Leitherer
中科院分区：
文献类型：
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作者：
C. Leitherer
给出了适用于邻近星系中大质量恒星含量的居群综合计算。恒星演化计算结合质量损失、带线覆盖的模型大气和光谱类型校准来计算大质量恒星的可观测参数作为恒星形成速率和初始质量函数斜率的函数。预测了给定光谱类型的O星的数量、W-R星的数量、超新星的速率和电离光子的通量。如果可以获得恒星数和电离通量数据，就可以从观测中得出恒星大气和恒星演化理论的重要约束条件。参94。
Population synthesis calculations applicable to the massive stellar content in nearby galaxies are presented. Stellar evolution calculations are combined with mass loss, model atmospheres with line blanketing, and a spectral type calibration to compute observable parameters of massive stars as a function of the star formation rate and the initial mass function slope. The number of O stars of given spectral types, the number of W-R stars, supernova rates, and fluxes of ionizing photons are predicted. Important constraints for the theories of stellar atmospheres and stellar evolution can be derived from observations if stellar number counts and ionizing flux data are available. 94 refs.