MK标准星的CCD光谱及光谱分类判据向黄红区的扩展

CCD Spectra of MK Standards and a Preliminary Extension of the MK Classification tothe Yellow-Red Region

本文提供了１２５颗ＭＫ标准星的ＣＣＤ光谱，光谱型从Ｏ到Ｍ，光度级从Ｖ到Ⅰ，构成较完整的二元分类框架，光谱覆盖范围由传统蓝紫区延伸到黄红区．初步考察和归纳了黄红区适于恒星分类的主要光谱特征和判据．这些结果对于采用相似分辨率的恒星光谱分类工作是非常有用的．

e present CCD spectra of 125 MK standards covering the spectral types from Oto M and luminosity classes from V to I. The set of spectra forms a reference frame fortwo-dimensional spectral classification. The wavelength coverage is extended to the yellowred region, and the criteria suitable for stellar classification in this region are shown andpresented. The spectra and criteria described here are useful for stellar classification workwith similar spectral resolution. All stellar spectra are in electronic form, which is availablefor anybody in need of them.