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Kinematic and chemical properties of five open clusters based on SDSS DR7
Gao XinHua1; Chen Li1
2010
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume10Issue:8Pages:761
AbstractWe present metallicities and radial velocities for five old open clusters (NGC 6791, NGC 2420, NGC 2682, NGC 2158, and NGC 7789) using data from the seventh public data release of the Sloan Digital Sky Survey (SDSS), which includes the directed stellar program SEGUE: Sloan Extension For Galactic Understanding and Exploration. The radial velocities are used to calculate cluster membership probabilities for stars in each cluster region. NGC 6791, NGC 2420, NGC 2682, NGC 2158 and NGC 7789 are found to have mean metallicities Fe/H= +0.08 +/- 0.09, -0.38 +/- 0.11, -0.08 +/- 0.05, -0.41 +/- 0.13 and -0.19 +/- 0.13 dex (s.d.), respectively. The mean radial velocities for NGC 6791, NGC 2420, NGC 2682, NGC 2158 and NGC 7789 are V(r) = -45.9 +/- 0.2, + 76.1 +/- 0.2, +35.0 +/- 0.2, +26.9 +/- 0.2 and -48.2 +/- 0.2 km s(-1)(s.e.m.), respectively. We have compared our results with the values from literatures, and found that our metallicity of NGC 6791 is significantly underestimated (by about 0.3 dex) and our radial velocities of the open clusters agree well with the values derived using high-resolution spectroscopy.
KeywordOLD OPEN CLUSTERS DIGITAL SKY SURVEY RICH OPEN CLUSTER AGE-METALLICITY RELATION COLOR-MAGNITUDE DIAGRAM BETA CCD PHOTOMETRY RED GIANT STARS NGC 7789 RADIAL-VELOCITIES METAL-RICH open clusters and associations: general open clusters and associations: individual (NGC 6791, NGC 2420, NGC 2682, NGC 2158, NGC 7789)
Language英语
Funding Project[National Natural Science Foundation of China] ; [Key Project] ; [Group Innovation] ; [973 program]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62497
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院
3.Key Lab Astrophys, Shanghai 200234, Peoples R China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao XinHua,Chen Li. Kinematic and chemical properties of five open clusters based on SDSS DR7[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2010,10(8):761.
APA Gao XinHua,&Chen Li.(2010).Kinematic and chemical properties of five open clusters based on SDSS DR7.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,10(8),761.
MLA Gao XinHua,et al."Kinematic and chemical properties of five open clusters based on SDSS DR7".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 10.8(2010):761.
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