Rotation Periods of Nine ROSAT Selected Solar-Type Stars  

作　　者：Li-Feng Xing Shuang-Yi Zhao Wei Su Yan Shen Xiao-Bin Zhang Jian-Yan Wei 

机构地区：[1]Department of Technology and Physics, Zhengzhou Unversity of Light Industry, Zhengzhou 450002 [2]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 [3]Department of Physics, Xingtai University, Xingtai 054001

出　　处：《Chinese Journal of Astronomy and Astrophysics》2007年第4期551-557,共7页中国天文和天体物理学报（英文版）

基　　金：the National Natural Science Foundation of China.

摘　　要：We monitored 16 X-ray selected young solar-type stars for light variation and found appreciable periodic light variability with amplitudes of a few hundredths of a magni- tude in nine of the objects. Using the method of Phase Dispersion Minimization （PDM） and Fourier analysis （software PERIOD04）, the rotation periods of these stars were determined from the photometric data. The rotation periods of all nine stars are shorter than about 3 days. It is suggested that, as with the Pleiades cluster, small amplitude light variations are quite common among young solar-type stars with rotation periods around 3 days or less. This gives further evidence for the spin up of solar-type stars predicted by models of angular momentum evolution of pre-main sequence stars.We monitored 16 X-ray selected young solar-type stars for light variation and found appreciable periodic light variability with amplitudes of a few hundredths of a magni- tude in nine of the objects. Using the method of Phase Dispersion Minimization （PDM） and Fourier analysis （software PERIOD04）, the rotation periods of these stars were determined from the photometric data. The rotation periods of all nine stars are shorter than about 3 days. It is suggested that, as with the Pleiades cluster, small amplitude light variations are quite common among young solar-type stars with rotation periods around 3 days or less. This gives further evidence for the spin up of solar-type stars predicted by models of angular momentum evolution of pre-main sequence stars.

关 键 词：stars： late-type - stars： pre-main sequence - stars： rotation 

分 类 号：P18[天文地球—天文学]