An Introduction to Modern Astrophysics · Problem 11.6
The Interstellar Medium and Star Formation — Carroll & Ostlie
Physics — Astrophysics · doppler-line-widths
Problem
Estimate the thermally Doppler-broadened line widths for the hydrogen Lyα, C III, O VI, and Mg X lines given on page 365; use the temperatures provided. Take the masses of H, C, O, and Mg to be 1 u, 12 u, 16 u, and 24 u, respectively.