Open AccessAbundances of Elements Lighter than Scandium in the Atmosphere of the Standard Giant Star α Sex (HD 87887, A0 III)
Author(s) -
Richard Monier
Publication year - 2022
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/ac47a4
Subject(s) - scandium , ultraviolet , atmosphere (unit) , spectral line , chlorine , astrophysics , silicon , abundance (ecology) , chemistry , physics , astronomy , inorganic chemistry , optics , optoelectronics , biology , organic chemistry , fishery , thermodynamics
The abundances of elements lighter than scandium in the atmosphere of the A0 III giant, α Sex, are derived using archival ultraviolet and optical spectra. Most of the strongest lines present in the far-ultraviolet spectrum of α Sex can be attributed to chemical elements lighter than calcium. The synthesis of selected lines in the optical and ultraviolet yields new abundances, in particular for elements which have few lines in the optical range. Helium, oxygen, silicon and sulfur are found to have solar abundances, most other elements are underabundant. Aluminium may be marginally overabundant. The lines of chlorine are probably present in the FUV but they are too blended to derive the abundance of chlorine.