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arXiv 1006.3593astro-ph.SR
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双星恒星星族合成模型

Binary Stellar Population Synthesis Model

F. Zhang, Z. Han, L. Li

摘要:

利用云南演化星族合成(EPS)模型,给出了一组具有相互作用的瞬时爆发双星恒星星族(BSP)的积分颜色、积分光谱能量分布(ISEDs)和吸收线指数。通过比较有和没有相互作用的人口的结果,我们表明,包含二进制相互作用使人口的外观显着蓝色。这种效应提高了人口的衍生年龄和金属丰度。为了用于现代光谱星系调查的研究中/高光谱分辨率,我们还提出了中(3A)和高分辨率(~0.3A)ISED和利克/IDS吸收线指数的BSP。为了直接与观测结果进行比较,还通过直接从ISED测量Lick/IDS吸收指数来呈现它们。

英文摘要:

Using Yunnan evolutionary population synthesis (EPS) models, we present integrated colours, integrated spectral energy distributions (ISEDs) and absorption-line indices defined by the Lick Observatory image dissector scanner (Lick/IDS) system, for an extensive set of instantaneous-burst binary stellar populations (BSPs) with interactions. By comparing the results for populations with and without interactions we show that the inclusion of binary interactions makes the appearance of the population substantially bluer. This effect raises the derived age and metallicity of the population. To be used in the studies of modern spectroscopic galaxy surveys at intermediate/high spectral resolution, we also present intermediate- (3A) and high-resolution (~0.3A) ISEDs and Lick/IDS absorption-line indices for BSPs. To directly compare with observations the Lick/IDS absorption indices are also presented by measuring them directly from the ISEDs.

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