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arXiv 1808.06629astro-ph.SR
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IGRINS光谱库

IGRINS Spectral Library

Sunkyung Park, Jeong-Eun Lee, Wonseok Kang, Sang-Gak Lee, Moo-Young Chun, Kang-Min Kim, In-Soo Yuk, Jae-Joon Lee, Gregory N. Mace, Hwihyun Kim, Kyle F. Kaplan, … 展开作者

Sunkyung Park, Jeong-Eun Lee, Wonseok Kang, Sang-Gak Lee, Moo-Young Chun, Kang-Min Kim, In-Soo Yuk, Jae-Joon Lee, Gregory N. Mace, Hwihyun Kim, Kyle F. Kaplan, Chan Park, Jae Sok Oh, Sungho Lee, Daniel T. Jaffe

摘要:

我们提出了一个图书馆的高分辨率(R $\equiv$ $λ$ / $Δ$ $λ$ $\sim$ 45,000)和高信噪比(S/N $\geq$ 200)的近红外光谱的恒星的广泛的光谱类型和光度类。光谱是用浸没光栅红外光谱仪(IGRINS)获得的,覆盖了H(1.496-1.780 $μ$ m)和K(2.080-2.460 $μ$ m)大气窗口的全部范围。这些目标主要是被选为MK标准恒星,涵盖了广泛的有效温度和表面重力,金属丰度接近太阳值。目前,该库包括84颗恒星的通量校准和碲吸收校正光谱,并有可能扩大以提供更密集的参数空间覆盖范围。在整个H和K大气窗口中,我们确定了对$T_\mathrm{eff}$或$\log g$敏感的光谱线,并定义了相应的光谱指数。我们还提供了它们的等效宽度。对于这些指标,我们得出的经验关系的测量等效宽度和恒星大气参数。因此,导出的经验公式可以用来计算恒星的$T_\mathrm{eff}$和$\log g$,而不需要恒星大气模型。

英文摘要:

We present a library of high-resolution (R $\equiv$ $λ$/$Δ$$λ$ $\sim$ 45,000) and high signal-to-noise ratio (S/N $\geq$ 200) near-infrared spectra for stars of a wide range of spectral types and luminosity classes. The spectra were obtained with the Immersion GRating INfrared Spectrograph (IGRINS) covering the full range of the H (1.496-1.780 $μ$m) and K (2.080-2.460 $μ$m) atmospheric windows. The targets were primarily selected for being MK standard stars covering a wide range of effective temperatures and surface gravities with metallicities close to the Solar value. Currently, the library includes flux-calibrated and telluric-absorption-corrected spectra of 84 stars, with prospects for expansion to provide denser coverage of the parametric space. Throughout the H and K atmospheric windows, we identified spectral lines that are sensitive to $T_\mathrm{eff}$ or $\log g$ and defined corresponding spectral indices. We also provide their equivalent widths. For those indices, we derive empirical relations between the measured equivalent widths and the stellar atmospheric parameters. Therefore, the derived empirical equations can be used to calculate $T_\mathrm{eff}$ and $\log g$ of a star without requiring stellar atmospheric models.

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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