Close binary mass anomalies and metallicity

Details Close binary mass anomalies and metallicity Close binary mass anomalies and metallicity

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..151v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 1, 1986, p. 151-169.

Statistics

8

Eclipsing Binary Stars, Metallicity, Radial Velocity, Stellar Mass, Anomalies, Error Analysis, Statistics, Stellar Composition

Scientific paper

Direct (radial velocity) and indirect (spectral type, luminosity class) mass determinations for luminosity class V binaries are compared. The existence of statistical biases or apparently irreconcilable individual discrepancies, or both, in the data is examined, and their explanation by astrophysical effects such as chemical composition and age differences is considered. The existence of residual discrepancies, after correction for chemical composition effects and statistical allowance for age effects, which could only be due to other astrophysical effects, to instrumental effects, or to selection effects, is investigated. A need for at least one additional astrophysical effect, suspected to be fast core rotation, is found in a few binaries. It is argued that some remaining evidence for systematic observational errors is more likely to be the result of selection effects rather than an instrumental effect.

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