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arXiv 1807.08121astro-ph.SR
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用Automated方法研究Am星的低分辨光谱

Low resolution spectroscopic investigation of Am stars using Automated method

Kaushal Sharma, Santosh Joshi, H. P. Singh

摘要:

全谱拟合的自动化方法给出了晚A、F、G和早K型恒星大气参数(Teff、logg和[Fe/H])的可靠估计。最近,该技术在较冷的状态下得到了进一步改进,有效范围扩展到M6 - M7光谱类型(Teff $\sim\,2900$ K)。本研究的目的是探索这种方法的应用程序的低分辨率光谱的Am星,一类化学奇特(CP)的明星,以检查这些对象的鲁棒性。我们使用ULySS和MILES(中等分辨率INT经验光谱库)V2光谱分析进行参数确定。确定Teff和logg被发现是在良好的协议与高分辨率光谱获得的。

英文摘要:

Automated method of full spectrum fitting gives reliable estimates of stellar atmospheric parameters (Teff, logg and [Fe/H]) for late A, F, G and early K type stars. Recently, the technique was further improved in the cooler regime and the validity range was extended up to M6 - M7 spectral type( Teff $\sim\,2900$ K). The present study aims to explore the application of this method on the low-resolution spectra of Am stars, a class of chemically peculiar (CP) stars, to examine its robustness for these objects. We use ULySS with MILES (Medium-resolution INT Library of Empirical Spectra) V2 spectral interpolator for parameter determination. Determined Teff and logg are found to be in good agreement with those obtained from high-resolution spectroscopy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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