论文标题
Megara-GTC恒星光谱库（i）
MEGARA-GTC Stellar Spectral Library (I)
论文作者
论文摘要
Megara（多孔{ó} grafo en gtc de alta coluci {ó} 手术。对梅加拉的科学剥削要求一个出色的谱系图书馆来解释星系数据并估计恒星种群的贡献。本文介绍了Megara-GTC光谱库，详细介绍了目录大楼背后的理由。我们介绍了97颗恒星的光谱（21个单独的恒星和56个球形群集M15成员，是在调试过程中取下的子样本；我们正在进行的GTC开放时间计划中的20颗恒星）。在HR-R和HR-I设置中，光谱具有R〜 = 〜20000，分别为6563和8633〜Å。我们描述了减少和分析数据的程序。然后，我们通过$χ^{2} $最小化技术来确定每个频谱的最合适的理论模型，以得出恒星物理参数并讨论结果。我们还测量了一些吸收线和指数。最后，本文介绍了我们的项目，以完成图书馆和数据库，以使社区可用。
MEGARA (Multi Espectr{ó}grafo en GTC de Alta Resoluci{ó}n para Astronom{\'ı}a) is an optical (3650~--~9750Å), fibre-fed, medium-high spectral resolution (R = 6000, 12000, 20000) instrument for the GTC 10.4m telescope, commissioned in the summer of 2017, and currently in operation. The scientific exploitation of MEGARA demands a stellar-spectra library to interpret galaxy data and to estimate the contribution of the stellar populations. This paper introduces the MEGARA-GTC spectral library, detailing the rationale behind the catalogue building. We present the spectra of 97 stars (21 individual stars and 56 members of the globular cluster M15, being both sub-samples taken during the commissioning runs; and 20 stars from our on-going GTC Open-Time program). The spectra have R~=~20000 in the HR-R and HR-I setups, centred at 6563 and 8633~Å respectively. We describe the procedures to reduce and analyse the data. Then, we determine the best-fitting theoretical models to each spectrum through a $χ^{2}$ minimisation technique to derive the stellar physical parameters and discuss the results. We have also measured some absorption lines and indices. Finally, this article introduces our project to complete the library and the database to make the spectra available to the community.
