| Taurus-Auriga外围区ROSAT定点观测选WTTS的光学证认与研究 |
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| 引用本文： | 李金增,胡景耀.Taurus-Auriga外围区ROSAT定点观测选WTTS的光学证认与研究[J].中国天文和天体物理学报,2000,20(1). |
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| 作者姓名： | 李金增 胡景耀 |
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| 作者单位： | 中国科学院北京天文台!北京，100012，中国科学院国家天文观测中心!北京，100012 |
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| 摘 要： | 1引言金牛T型星（TTaur1）是一类低质量（＜3＊O）光谱晚型（晚F、G、K和M主序前类太阳恒星．依据其H。发射线的强弱可分为两类：经典TTauri星（CTTS）和弱发射线TTauri星（WTTS．一般认为，CTTS的地发射线等值宽度在15A以上，具有强的红外和紫外色余，并有CallH、K发射线，而且其空间分布主要集中在分子云密集区．CTTS具有尘埃包层或吸积盘，有些还伴有分子外向流、HZO脉泽等质能外流，在红外源的分类中山属11型红外源．由于CTTS有着很强的H。发射线，绝大多数＊＊＊s是利用民巡天观测发现的K‘」．而＊＊＊s则没有＊＊＊…
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| 关 键 词： | RASS 主序前星 弱发射线TTauri 光学证认 |
Optical Identification and Study of X-ray Selected WTTS in the Taurus-Auriga Outskirts based on ROSAT Pointing Observations |
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| LI Jin-zeng,HU Jing-yao.Optical Identification and Study of X-ray Selected WTTS in the Taurus-Auriga Outskirts based on ROSAT Pointing Observations[J].Chinese Journal of Astronomy and Astrophysics,2000,20(1). |
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| Authors: | LI Jin-zeng HU Jing-yao |
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| Abstract: | 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. |
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| Keywords: | PMS WTTS RASS optical identification |
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