Предмет: Астрономия, автор: zrelikvlad

Дам 35б.Чему равны абсолютные величины звёзд, если расстояние до обеих составляет 3 персека, а видимые звёздные величины их равны 3,4m и 1,6m

Ответы

Автор ответа: ppp6491
0

Ответ:  Абсолютные звездные величины звезд М1 = 6,014;   М2 = 4,214

Объяснение:  Дано:

Видимая звездная величина первой звезды  m1 = 3,4m

Видимая звездная величина второй звезды  m2 = 1,6m

Расстояния до обеих звезд равны, т.е. S1 = S2 = 3парсека

Найти абсолютные звездные величины звезд М1 - ?  и  М2 - ?

В общем случае абсолютная звездная величина звезды определяется выражением: М = m + 5 – 5lgS.

Таким образом, М1 = m1 + 5 – 5lgS = 3,4 + 5 – 5lg3 = 8,4 – 5*0,477… = 6,014…

М2 =  m2 + 5 – 5lgS = 1,6 + 5 - 5lg3 = 6,6 - 5*0,477 = 4,214

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