Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (434) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (139)
· Associated Articles
· Also-Read Articles (Reads History)
· Translate This Page
Multiplicity among solar-type stars
Abt, H. A.; Levy, S. G.
AA(Kitt Peak National Observatory, Tucson, Ariz.), AB(Kitt Peak National Observatory, Tucson, Ariz.)
Astrophysical Journal Supplement Series, vol. 30, Mar. 1976, p. 273-306. (ApJS Homepage)
Publication Date:
NASA/STI 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
Bibliographic Code:


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.

Associated Articles

Part  1     Part  2     Part  3    

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints