STATISTICAL EQUILIBRIUM OF COPPER IN THE SOLAR ATMOSPHERE

	STATISTICAL EQUILIBRIUM OF COPPER IN THE SOLAR ATMOSPHERE
	Shi, J. R.1; Gehren, T.2; Zeng, J. L.3; Mashonkina, L.1,4; Zhao, G.1
刊名	ASTROPHYSICAL JOURNAL
	2014-02-20
卷号	782 期号:2
关键词	line: formation line: profiles Sun: abundances
英文摘要	Non-local thermodynamic equilibrium (NLTE) line formation for neutral copper in the one-dimensional solar atmospheres is presented for the atomic model, including 96 terms of CuI and the ground state of CuII. The accurate oscillator strengths for all the line transitions in model atom and photoionization cross sections were calculated using the R-matrix method in the Russell-Saunders coupling scheme. The main NLTE mechanism for CuI is the ultraviolet overionization. We find that NLTE leads to systematically depleted total absorption in the Cui lines and, accordingly, positive abundance corrections. Inelastic collisions with neutral hydrogen atoms produce minor effects on the statistical equilibrium of Cui in the solar atmosphere. For the solar CuI lines, the departures from LTE are found to be small, the mean NLTE abundance correction of similar to 0.01 dex. It was found that the six low-excitation lines, with excitation energy of the lower level E-exc <= 1.64 eV, give a 0.14 dex lower mean solar abundance compared to that from the six E-exc > 3.7 eV lines, when applying experimental gf-values of Kock & Richter. Without the two strong resonance transitions, the solar mean NLTE abundance from 10 lines of Cui is log epsilon(circle dot) (Cu) = 4.19+/-0.10, which is consistent within the error bars with the meteoritic value 4.25+/-0.05 of Lodders et al. The discrepancy between E-exc = 1.39-1.64 eV and E-exc > 3.7 eV lines can be removed when the calculated gf-values are adopted and a mean solar abundance of log epsilon(circle dot) (Cu) = 4.24+/-0.08 is derived.
收录类别	SCI
语种	英语
WOS记录号	WOS:000334584700022
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6416]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Sternwarte, D-81679 Munich, Germany 3.Natl Univ Def Technol, Dept Phys, Coll Sci, Changsha 410073, Hunan, Peoples R China 4.Russian Acad Sci, Inst Astron, Moscow 109017, Russia
推荐引用方式 GB/T 7714	Shi, J. R.,Gehren, T.,Zeng, J. L.,et al. STATISTICAL EQUILIBRIUM OF COPPER IN THE SOLAR ATMOSPHERE[J]. ASTROPHYSICAL JOURNAL,2014,782(2).
APA	Shi, J. R.,Gehren, T.,Zeng, J. L.,Mashonkina, L.,&Zhao, G..(2014).STATISTICAL EQUILIBRIUM OF COPPER IN THE SOLAR ATMOSPHERE.ASTROPHYSICAL JOURNAL,782(2).
MLA	Shi, J. R.,et al."STATISTICAL EQUILIBRIUM OF COPPER IN THE SOLAR ATMOSPHERE".ASTROPHYSICAL JOURNAL 782.2(2014).