NEWLY DISCOVERED ALPHA-POOR STARS IN THE SOLAR NEIGHBORHOOD

	NEWLY DISCOVERED ALPHA-POOR STARS IN THE SOLAR NEIGHBORHOOD
	Xing, Q. F.1,2; Zhao, G.1
刊名	ASTROPHYSICAL JOURNAL
	2015-06-01
卷号	805 期号:2
关键词	Galaxy: formation stars: abundances stars: atmospheres
英文摘要	We present an abundance analysis for two newly discovered alpha-poor stars based on high-resolution spectroscopy. These stars were previously identified in the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 1 as candidate a-poor stars. We observed these candidate alpha-poor stars with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the 6.5 m Magellan-Clay Telescope located at Las Campanas Observatory. This high-resolution analysis confirms the low [alpha/Fe] abundance ratios for these stars compared to those of the majority of Galactic stars with comparable metallicities ([Fe/H] similar to -0.5). The large deficiencies of alpha-elements suggest that these stars possess an anomalous chemical enrichment history. To have found such alpha-poor stars in our sample indicates that large scatters of the alpha-element abundance ratios may exist near solar metallicity. These results also demonstrate that our method is capable of selecting a-poor stars from low-resolution stellar spectra.
收录类别	SCI
语种	英语
WOS记录号	WOS:000356715400061
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5668]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xing, Q. F.,Zhao, G.. NEWLY DISCOVERED ALPHA-POOR STARS IN THE SOLAR NEIGHBORHOOD[J]. ASTROPHYSICAL JOURNAL,2015,805(2).
APA	Xing, Q. F.,&Zhao, G..(2015).NEWLY DISCOVERED ALPHA-POOR STARS IN THE SOLAR NEIGHBORHOOD.ASTROPHYSICAL JOURNAL,805(2).
MLA	Xing, Q. F.,et al."NEWLY DISCOVERED ALPHA-POOR STARS IN THE SOLAR NEIGHBORHOOD".ASTROPHYSICAL JOURNAL 805.2(2015).