Taurus-Aurigaa外围区ROSAT定点观测选WTTS的光学证认与研究  

Optical Identification and Study of X-ray Selected WTTS in the Taurus-Auriga Outskirts based on ROSAT Pointing Observations

作　　者：李金增[1] 胡景耀[2] 

机构地区：[1]中国科学院北京天文台,北京100012 [2]中国科学院国家天文观测中心,北京100012

出　　处：《天体物理学报》2000年第1期25-32,共8页

基　　金：国家自然科学基金

摘　　要：Optical spectroscopic identification of X-ray selected WTTS candidates in the Taurus-Auriga outskirts on the basis of ROSAT pointing observations, has resulted in the discovery of 4 WTTS and several other Li-rich sources. This paper gives the R magnitudes, coordinates (J2000) from USNO (V1.0), spectral type classifications, equivalent widths of Li I absorption and H. emission lines of all the X-ray sources investigated, and the proper motions and parallaxes of some of them, as well as the spectra of the newly discovered WTTS. For the first time, the spatial distribution of a rather complete, ROSAT-discovered sample of WTTS, including those identified from the ROSAT All-Sky Survey and PSPC pointing observations around one of the nearby star-forming regions has been provided, together with a preliminary analysis.Optical spectroscopic identification of X-ray selected WTTS candidates in the Taurus-Auriga outskirts on the basis of ROSAT pointing observations, has resulted in the discovery of 4 WTTS and several other Li-rich sources. This paper gives the R magnitudes, coordinates (J2000) from USNO (V1.0), spectral type classifications, equivalent widths of Li I absorption and H. emission lines of all the X-ray sources investigated, and the proper motions and parallaxes of some of them, as well as the spectra of the newly discovered WTTS. For the first time, the spatial distribution of a rather complete, ROSAT-discovered sample of WTTS, including those identified from the ROSAT All-Sky Survey and PSPC pointing observations around one of the nearby star-forming regions has been provided, together with a preliminary analysis.

关 键 词：T-A外围区 ROSAT定点 光学证认 恒星 WTTS 

分 类 号：P141.5[天文地球—天体物理]