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arXiv 1502.05237astro-ph.SR
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用于SDSS-III/APOGEE巡天的新H波段恒星光谱库

New H-band Stellar Spectral Libraries for the SDSS-III/APOGEE survey

O. Zamora, D. A. Garcia-Hernandez, C. Allende Prieto, R. Carrera, L. Koesterke, B. Edvardsson, F. Castelli, B. Plez, D. Bizyaev, K. Cunha, A. E. Garcia Perez, B… 展开作者

O. Zamora, D. A. Garcia-Hernandez, C. Allende Prieto, R. Carrera, L. Koesterke, B. Edvardsson, F. Castelli, B. Plez, D. Bizyaev, K. Cunha, A. E. Garcia Perez, B. Gustafsson, J. A. Holtzman, J. E. Lawler, S. R. Majewski, A. Manchado, Sz. Meszaros, N. Shane, M. Shetrone, V. V. Smith, G. Zasowski

摘要:

斯隆数字巡天-第三期(SDSS-III)阿帕奇点天文台银河演化实验(APOGEE)获得了银河系约146 000颗恒星的H $-$波段($\sim$ 1.5 $-$ 1.7 $μ$ m)的高分辨率(R $\sim$ 22 500)、高信噪比($>$ 100)光谱。我们已经计算了光谱库与有效温度($T\rm{_{eff}}$)范围从3500至8000 K的自动化学分析的调查数据。用于从SDSS-III数据发布12(DR 12)中的远地点辐射光谱推导恒星参数和丰度的数据库以ATLAS 9模型大气和ASS $ε$ T光谱合成代码为基础。我们提出了第二套库的基础上MARCS模型大气和光谱合成代码Turbospectrum。ATLAS 9/ASS $ε$ T($T\rm{_{eff}}$ = 3500 $-$ 8000 K)和MARCS/Turbospectrum($T\rm{_{eff}}$ = 3500 $-$ 5500 K)网格覆盖了广泛的金属丰度范围($-$ 2.5 $\leq$ [M/H] $\leq$ $+$ 0.5 dex),表面重力(0 $\leq$ log $g$ $\leq$ 5 dex),微湍流(0.5 $\leq$ $ξ$ $\leq$ 8 km~s $^{-1}$),碳($-$ 1 $\leq$ [C/M] $\leq$ $+$ 1 dex),氮($-$ 1 $\leq$ [N/M] $\leq$ $+$ 1 dex)和$α$ -元素($-$ 1 $\leq$ [ $α$ /M] $\leq$ $+$ 1 dex)变体,因此具有七个维度。我们比较了ATLAS 9/ASS $ε$ T和MARCS/Turbospectrum库,并将它们应用于分析太阳和K2巨星大角星的H $-$波段光谱,以及在非常高的分辨率下观测到的知名巨星的选定样本。新的APOGEE库是公开的,可用于使用其他高分辨率光谱仪在H $-$波段进行化学研究。

英文摘要:

The Sloan Digital Sky Survey--III (SDSS--III) Apache Point Observatory Galactic Evolution Experiment (APOGEE) has obtained high resolution (R $\sim$ 22,500), high signal-to-noise ratio ($>$ 100) spectra in the H$-$band ($\sim$1.5$-$1.7 $μ$m) for about 146,000 stars in the Milky Way galaxy. We have computed spectral libraries with effective temperature ($T\rm{_{eff}}$) ranging from 3500 to 8000 K for the automated chemical analy\-sis of the survey data. The libraries, used to derive stellar parameters and abundances from the APOGEE spectra in the SDSS--III data release 12 (DR12), are based on ATLAS9 model atmospheres and the ASS$ε$T spectral synthesis code. We present a second set of libraries based on MARCS model atmospheres and the spectral synthesis code Turbospectrum. The ATLAS9/ASS$ε$T ($T\rm{_{eff}}$ = 3500$-$8000 K) and MARCS/Turbospectrum ($T\rm{_{eff}}$ = 3500$-$5500 K) grids cover a wide range of metallicity ($-$2.5 $\leq$ [M/H] $\leq$ $+$0.5 dex), surface gravity (0 $\leq$ log $g$ $\leq$ 5 dex), microturbulence (0.5 $\leq$ $ξ$ $\leq$ 8 km~s$^{-1}$), carbon ($-$1 $\leq$ [C/M] $\leq$ $+$1 dex), nitrogen ($-$1 $\leq$ [N/M] $\leq$ $+$1 dex), and $α$-element ($-$1 $\leq$ [$α$/M] $\leq$ $+$1 dex) variations, having thus seven dimensions. We compare the ATLAS9/ASS$ε$T and MARCS/Turbospectrum libraries and apply both of them to the analysis of the observed H$-$band spectra of the Sun and the K2 giant Arcturus, as well as to a selected sample of well-known giant stars observed at very high-resolution. The new APOGEE libraries are publicly available and can be employed for chemical studies in the H$-$band using other high-resolution spectrographs.

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