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arXiv 1006.3590astro-ph.SR
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红外通带中的二元相互作用效应

The Effect of Binary Interactions in Infrared Passbands

F. Zhang, L. Li, Z. Han

摘要:

利用演化星族合成(EPS)方法,给出了一组大范围的瞬时爆发双星恒星星族(BSP)的J、H、K、L、M和N星等积分和红外波段的颜色。通过比较具有和不具有二元相互作用的BSP的结果,我们表明,包含二元相互作用使得种群的大小更大(更暗),并且对于t > 1Gyr,综合颜色更小(更蓝)。此外,我们将我们的模型的震级和颜色与Bruzual & Charlot(2003年,以下简称BC 03)和Maraston(2005年,以下简称M05)进行了比较。最后,我们将这些模型与麦哲伦云球状星团(GC)和银河系GC进行了比较。在(V-R)-[Fe/H]和(V-I)-[Fe/H]图中,我们的模型似乎比BC 03和M05的模型更符合观测。

英文摘要:

We present the integrated J, H, K, L, M and N magnitudes and the colours involving infrared bands, for an extensive set of instantaneous-burst binary stellar populations (BSPs) by using evolutionary population synthesis (EPS). By comparing the results for BSPs WITH and WITHOUT binary interactions we show that the inclusion of binary interactions makes the magnitudes of populations larger (fainter) and the integrated colours smaller (bluer) for t > 1Gyr. Also, we compare our model magnitudes and colours with those of Bruzual & Charlot (2003, hereafter BC03) and Maraston (2005, hereafter M05). At last, we compare these model broad colours with Magellanic Clouds globular clusters (GCs) and Milky Way GCs. In (V-R)-[Fe/H] and (V-I)-[Fe/H] diagrams it seems that our models match the observations better than those of BC03 and M05.

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