Abstract
view Abstract Citations (499) References (84) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Multiplicity among solar-type stars. Abt, H. A. ; Levy, S. G. Abstract The paper presents results of a search for spectroscopic binaries among 135 bright field stars of types F3 - G2 IV or V. Orbital elements for 25 newly discovered spectroscopic binaries are derived from radial velocities measured in 20 coude spectra for each star, and velocity curves are also computed for each of these binaries. It is found that the ratios of observed singles:doubles:triples:quadruples among the 135 program stars are 42:46:9:2. The 88 computed and estimated periods show a relatively smooth distribution with a single maximum and a median period of 14 years. It is tentatively suggested that the discovered binaries show no pronounced grouping tendency in age or evolutionary state. The number of binaries not revealed is estimated, the secondary masses for both the observed and undetected binaries are determined statistically, and it is concluded that the short-period binaries are fission systems while the long-period systems are those in which pairs of protostars contracted separately. On the average, the multiple systems are found to be 0.22 magnitude brighter than the primaries alone. Publication: The Astrophysical Journal Supplement Series Pub Date: March 1976 DOI: 10.1086/190363 Bibcode: 1976ApJS...30..273A Keywords: Binary Stars; Radial Velocity; Stellar Spectrophotometry; Tables (Data); Least Squares Method; Orbit Calculation; Orbital Elements; Orbital Velocity; Periodic Variations; Protostars; Star Distribution; Stellar Evolution; Stellar Motions; Astronomy full text sources ADS | data products SIMBAD (139) Related Materials (2) Part 2: 1991A&A...248..485D Part 3: 2003A&A...397..159H
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