The Radial Velocity of Epsilon Aurigae.

Abstract

Sixty-two star lines have been measured on ninety-five spectrograms of o Aurigae taken between 1928 and 1958. The mean values of different groups of lines show large departures from the velocity-curve There are changes in the differential velocity shifts of strong and weak lines and the line of Mg ii 81 similar to those noticed during the 1928-1930 eclipse Many lines show structure during the eclipse as well as shortly before and after it