First giant branch and asymptotic giant branch stars in nearby aggregates

Abstract

view Abstract Citations (24) References (109) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS First Giant Branch and Asymptotic Giant Branch Stars in Nearby Aggregates Eggen, Olin J. ; Iben, Icko, Jr. Abstract The properties of the brightest red stars in several aggregates in the Galaxy are compared with theoretical models. 22 asymptotic giant branch (AGB) stars are identified, four of which are in the thermally pulsing AGB (TPAGB) phase and four of which are TPAGB carbon stars. Also, four cases of RGB stars are identified which have accreted substantial mass from the carbon-rich TPAGB precursor of a current white dwarf companion. There is general agreement between the observed and theoretical slopes of the RGB and early AGB branches, and quantitative differences between the positioning of observed sequences can be understood in terms of differences in metallicity and mass predicted by the theory. Publication: The Astronomical Journal Pub Date: April 1991 DOI: 10.1086/115773 Bibcode: 1991AJ....101.1377E Keywords: Asymptotic Giant Branch Stars; Milky Way Galaxy; Red Giant Stars; Astronomical Models; Hertzsprung-Russell Diagram; Open Clusters; Stellar Luminosity; Stellar Mass; Stellar Spectrophotometry; Astrophysics; STARS: EVOLUTION; STARS: RED GIANTS; STARS: SUPERGIANTS; STARS: LATE-TYPE full text sources ADS | data products SIMBAD (295)