We have determined new statistical relations to estimate the fundamental atmospheric parameters of effective temperature and surface gravity, using MK spectral classification, and vice versa. The relations were constructed based on the published calibration tables (for main sequence stars) and observational data from stellar spectral atlases (for giants and supergiants). These new relations were applied to field giants with known atmospheric parameters, and the results of the comparison of our estimations with available spectral classification had been quite satisfactory.

中文翻译：

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恒星光谱和光度等级与恒星有效温度和表面重力之间的统计关系

我们已经确定了新的统计关系来估计有效温度和表面重力的基本大气参数，使用 MK 光谱分类，反之亦然。这些关系是根据已发表的校准表（对于主序星）和恒星光谱图谱（对于巨星和超巨星）的观测数据构建的。这些新关系应用于具有已知大气参数的场巨星，我们的估计与可用光谱分类的比较结果非常令人满意。