SED for 7 stellar calibrators

Among late-type red giants, an interesting change occurs in the structure of the outer atmospheric layers as one moves to later spectral types in the Hertzsprung-Russell...在晚型红巨星中，当朝着赫茨普龙-罗素（Hertzsprung-Russell）图中的更晚光谱型演化时，其外层大气结构会发生一项值得关注的变化。