Open AccessOn the presence of europium in stars
Author(s) -
Joseph Lunt
Publication year - 1907
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1907.0019
Subject(s) - stars , line (geometry) , europium , astrophysics , physics , medicine , mathematics , optics , geometry , luminescence
In measures of the radial velocity ofα Boötis andβ Geminorum, the results for the calcium line atλ 4435·851 (Rowland) are discordant. In both stars, in measures made independently by Mr. Goatcher and the author, the value for this line is too low (positive). The following are the figures:— For this line a shift of λ 1·0 = 67·60 kiloms. per second. The Ca line, therefore, appears to be 0·049λ to the violet side of its tabular position.