Open AccessTHE MANGANESE MERCURY STAR π 1 BOOTIS
Author(s) -
John Wm. Montgomery,
L. H. Aller
Publication year - 1969
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.63.4.1039
Subject(s) - mercury (programming language) , manganese , astrophysics , star (game theory) , chemistry , physics , computer science , organic chemistry , programming language
High-dispersion plates secured with the Coudé spectrograph of the Lick 120 inch telescope have been used to analyze the peculiarA star π1 Bootis. Spectral-energy distribution measurements are combined with line-intensity data for iron and manganese in two stages of ionization to obtain a fit with model atmospheres forT eff = 13,000°K and logg = 4. The influence of adoptedT andg on the derived abundances is discussed. Although C, O, Mg, Si, Ti, Cr, and Fe appear to have nearly normal (i.e., solar) abundances, strontium appears to be enhanced in abundance by an order of magnitude, and scandium is about 50 times overabundant, while manganese and yttrium appear to be two orders of magnitude overabundant. If the identification of gallium is correct, this element is overabundant by a factor approaching 100,000; while if λ3983.90 is to be attributed to HgII, as Bidelman suggests, the overabundance of this element is many orders of magnitude.