CHEMICAL ABUNDANCES OF MEMBER STARS IN THE OPEN CLUSTER NGC 2632 (PRAESEPE)

	CHEMICAL ABUNDANCES OF MEMBER STARS IN THE OPEN CLUSTER NGC 2632 (PRAESEPE)
	Yang, X. L.1,2; Chen, Y. Q.1; Zhao, G.1
刊名	ASTRONOMICAL JOURNAL
	2015-11-01
卷号	150 期号:5
关键词	Galaxy: disk open clusters and associations: individual (NGC 2632) stars: abundances
英文摘要	Based on high-resolution, high signal-to-noise ratio spectra, we present abundances of 17 elements (Fe, O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Co, Ni, Y, Zr, Ba, La) for six stars (one Am star, one F dwarf star, and four GK giant stars) and radial velocities for 18 proper-motion selected member stars in the open cluster NGC 2632. In the Am star, s-process elements Y and Ba are clearly overabundant, which may be considered as an indicator of a peculiar Am star. The average [Fe/H] is 0.16 +/- 0.06 from four GK giant member stars, which is similar to that of solar-type stars in the literature. As compared with dwarf stars, significant overabundances are found for Na, Mg, and Ba elements in our giant stars, which can be explained by the evolutionary effect. We also detect a star-to-star scatter of [Na/Fe] ratios among four giants which locate approximately at the same position in the CMD. Finally, we perform an analysis on the possible connection between the abundance and spatial structure of NGC 2632, but we find no inhomogeneous abundance among different clumps of stars in this cluster based on our limited sample.
收录类别	SCI
语种	英语
WOS记录号	WOS:000366460500020
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5496]
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 Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, X. L.,Chen, Y. Q.,Zhao, G.. CHEMICAL ABUNDANCES OF MEMBER STARS IN THE OPEN CLUSTER NGC 2632 (PRAESEPE)[J]. ASTRONOMICAL JOURNAL,2015,150(5).
APA	Yang, X. L.,Chen, Y. Q.,&Zhao, G..(2015).CHEMICAL ABUNDANCES OF MEMBER STARS IN THE OPEN CLUSTER NGC 2632 (PRAESEPE).ASTRONOMICAL JOURNAL,150(5).
MLA	Yang, X. L.,et al."CHEMICAL ABUNDANCES OF MEMBER STARS IN THE OPEN CLUSTER NGC 2632 (PRAESEPE)".ASTRONOMICAL JOURNAL 150.5(2015).