Star Classification

Description

Characteristics of different star classes: colour, temperature and absorption lines
Joseph Tedds
Flashcards by Joseph Tedds, updated more than 1 year ago
Joseph Tedds
Created by Joseph Tedds over 7 years ago
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Resource summary

Question Answer
O Colour: Blue Temperature: 25,000 - 50,000K Absorption Lines: Helium ions and atoms plus weak Hydrogen Balmer
B Colour: Blue Temperature: 11,000 - 25,000K Absorption Lines: Hydrogen Balmer and helium atoms
A Colour: Blue-white Temperature: 7,500K - 11,000K Absorption Lines: Strongest Hydrogen Balmer (in the visible spectrum) and some metal ions
F Colour: White Temperature: 6,000 - 7,500K Absorption Lines: Strong metal ions
G Colour: Yellow-white Temperature: 5,000 - 6,000K Absorption Lines: Metal ions and metal atoms
K Colour: Orange Temperature: 3,500 - 5,000K Absorption Lines: Metal atoms
M Colour: Red Temperature: < 3,500K Absorption Lines: Molecular bands e.g. titanium oxide
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