Zhao Jingkun1; Oswalt Terry D2; Chen Yuqin1; Shi Jianrong1; Tan Kefeng1; Fang Xiangsong1; Zhao Gang1; Yang Ming1; Zhang Yong3; Hou Yonghui3; Wang Yuefei3
Source Publicationresearchinastronomyandastrophysics
AbstractWe present chromospheric activity index SHK measurements for 119 995 F, G and K stars with high signal-to-noise ratio (S/N > 80) spectra, extracted from LAMOST DR1 in SDSS g band. The index δS for each of these stars is calculated by the difference between its SHK value and the baseline determined from very inactive stars. The effect of metallicity on measurement of δS varies with stellar T_(eff). No evident Vaughan-Preston gap appears in our sample. The relation between δS and vertical distance from the Galactic plane is determined for stars with T_(eff) 5500K, similar δS levels appear in both young and old cluster stars, which supports Pace’s suggestion that caution should be exercised when deriving the age of a single star by using its chromospheric activity. Finally, we investigate the relation between δS and the kinematics of our sample.
Document Type期刊论文
2.Embry-Riddle Aeronautical University
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao Jingkun,Oswalt Terry D,Chen Yuqin,et al. caiihkemissiondistributionof120000fgandkstarsinlamostdr1[J]. researchinastronomyandastrophysics,2015,15(8):1282.
APA Zhao Jingkun.,Oswalt Terry D.,Chen Yuqin.,Shi Jianrong.,Tan Kefeng.,...&Wang Yuefei.(2015).caiihkemissiondistributionof120000fgandkstarsinlamostdr1.researchinastronomyandastrophysics,15(8),1282.
MLA Zhao Jingkun,et al."caiihkemissiondistributionof120000fgandkstarsinlamostdr1".researchinastronomyandastrophysics 15.8(2015):1282.
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