| IRAS 17213-3841:晚型富碳星还是早型发射线星? |
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| 引用本文： | 陈培生,张品.IRAS 17213-3841:晚型富碳星还是早型发射线星?[J].天文学报,2003,44(4):350-354. |
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| 作者姓名： | 陈培生 张品 |
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| 作者单位： | 1. 中国科学院国家天文台云南天文台,昆明,650011
2. 中国科学院国家天文台云南天文台,昆明,650011;云南大学宇宙线研究所,昆明,650091 |
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| 基金项目： | 国家自然科学基金资助项目(项目编号: 10073018) |
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| 摘 要： | IRAS 17213-3841作为富碳星列于新版碳星星表中．然而该星的IRAS低分辨率光谱显示富氧的硅酸盐发射特征；光谱观测结果表明，该星是一个接近零龄主序的，光谱型为O9／B0的早型发射线星，而不是碳星，因此应从碳星星表中剔除．此外，将它证认为碳星的近红外-IRAS双色图方法并不是一个完全可靠的方法，用这一方法来证认碳星必须十分小心．
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| 关 键 词： | 富碳星 碳星 零龄主序 发射线 |
| 修稿时间： | 2003年4月8日 |
IRAS 17213-3841 : Late Type Carbon-rich Star or Early Type Emission Line Star? |
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| CHEN Pei-Sheng ZHANG Pin.IRAS 17213-3841 : Late Type Carbon-rich Star or Early Type Emission Line Star?[J].Acta Astronomica Sinica,2003,44(4):350-354. |
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| Authors: | CHEN Pei-Sheng ZHANG Pin |
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| Abstract: | IRAS 17213-3841 is listed as a carbon star in the new carbon star catalog. However, the IRAS low-resolution spectrum (LRS) of this star shows the oxygen-rich silicate emission feature. Furthermore, from the optical spectral observation it is shown that this star is an early type emission line star with the spectral type of O9/BO and near the ZAMS, but not a carbon star. Therefore, it should be removed out from the carbon star catalog. In addition, the near infrared-IRAS two color diagram method which is used to identify this star as carbon star is not a perfect reliable method. Using this method to identify carbon stars must be done with caution. |
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| Keywords: | stars: carbon stars: early-type stars: emission line infrared: stars |
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