The Half-Widths of Stellar Hα Profiles Deduced from Spectrograms Obtained with the McMath Solar Telescope

James Charles Lopresto
1971 Publications of the Astronomical Society of the Pacific  
Profiles of Ha were obtained photoelectrically for some late-type stars. The relationship between the absolute magnitude and the half-width of the Doppler core of Ha is better established than that with the half-width of the total profile found by Kraft, Preston, and Wolff in 1964.
doi:10.1086/129199 fatcat:axkv5ncy4fhtxi6hstiag3bxbu