Evolution of very low mass stars and brown dwarfs. II - The population II

Abstract

view Abstract Citations (65) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Evolution of Very Low Mass Stars and Brown Dwarfs. II. The Population II D'Antona, Francesca Abstract This paper addresses a number of problems connected with the evolution of low-mass (M ≤ 0.8 M_sun;) and very low mass (M ≥ 0.07 M_sun;) stars having metal contents much smaller than the solar metal content. Two main chemical compositions bracketing the Population II regime are considered: helium and metal contents Y = 0.23, Z = 10-4 (Cox and Stewart opacities) and Y = 0.25, Z = 10-3 (Alexander, Johnson, and Rypma opacities). For these compositions, the hydrogen burning minimum mass is evaluated. It is confirmed that the atmospheric opacities are the main factor influencing the minimum main-sequence luminosity. Population II luminosity functions (LFs) are constructed and applied to the interpretation of globular cluster main-sequence LFs. Publication: The Astrophysical Journal Pub Date: September 1987 DOI: 10.1086/165582 Bibcode: 1987ApJ...320..653D Keywords: Brown Dwarf Stars; Globular Clusters; Opacity; Stellar Evolution; Stellar Luminosity; Stellar Mass; Main Sequence Stars; Mass To Light Ratios; Astrophysics; CLUSTERS: GLOBULAR; LUMINOSITY FUNCTION; OPACITIES; STARS: EVOLUTION; STARS: INTERIORS; STARS: POPULATION II full text sources ADS | data products SIMBAD (2) Related Materials (1) Part 1: 1985ApJ...296..502D