Photometric Monitoring of ROSAT-Selected Weak Line T Tauri Stars  

作　　者：Li-Feng Xing Xiao-Bin Zhang Jian-Yan Wei 

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

出　　处：《Chinese Journal of Astronomy and Astrophysics》2006年第6期716-722,共7页中国天文和天体物理学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China.

摘　　要：We monitored the light curves of 22 weak-line T Tauri stars （WTTSs） discovered among the X-ray sources in the field of the Taurus-Auriga cloud. For 12 of the 22 WTTSs photometric periodic variability is confirmed and their rational periods are determined using Phase Dispersion Minimization （PDM） and Fourier analysis. Most of them are found to have periods shorter than one day. This gives further evidence for the spin up of solar-type stars predicted by the models of angular momentum evolution of pre-main sequence stars.We monitored the light curves of 22 weak-line T Tauri stars （WTTSs） discovered among the X-ray sources in the field of the Taurus-Auriga cloud. For 12 of the 22 WTTSs photometric periodic variability is confirmed and their rational periods are determined using Phase Dispersion Minimization （PDM） and Fourier analysis. Most of them are found to have periods shorter than one day. This gives further evidence for the spin up of solar-type stars predicted by the 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：P155.1[天文地球—天文学]