NAOC Open IR
NLTE analysis of high-resolution H-band spectra IV: neutral copper
Xu Xiaodong; Shi Jianrong; Zhang Junbo; Zhou Zeming
2020
Source PublicationResearch in Astronomy and Astrophysics
ISSN1674-4527
Volume20Issue:8
AbstractTo obtain reliable Cu abundances with the APOGEE H-band spectra, it is important to investigate the non-local thermodynamic equilibrium (NLTE) effects on the formation of the H-band Cu I lines. In addition, the Cu atomic model needs to be tested. Based on both the high-resolution and high signal-tonoise ratio H-band spectra from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) and optical data, we derived the LTE and NLTE copper abundances of 13 FGK sample stars with the spectral synthesis method. We find that the NLTE effects are negligible for the Cu I 16005.7°A line in the IR H-band. Consistent copper abundances within the uncertainties from these two sets of lines have been obtained, which indicates the reliability of our NLTE copper atomic model. We note that the Cu/Fe ratios increase with increasing metallicity when ~ –1.4 dex
Keywordline: formation line: profiles stars: abundances stars: atmospheres
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/74395
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu Xiaodong,Shi Jianrong,Zhang Junbo,et al. NLTE analysis of high-resolution H-band spectra IV: neutral copper[J]. Research in Astronomy and Astrophysics,2020,20(8).
APA Xu Xiaodong,Shi Jianrong,Zhang Junbo,&Zhou Zeming.(2020).NLTE analysis of high-resolution H-band spectra IV: neutral copper.Research in Astronomy and Astrophysics,20(8).
MLA Xu Xiaodong,et al."NLTE analysis of high-resolution H-band spectra IV: neutral copper".Research in Astronomy and Astrophysics 20.8(2020).
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