Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980iraj...14..226v&link_type=abstract
(Astronomical Science Group of Ireland, Meeting, Armagh, Northern Ireland, June 25, 1980.) Irish Astronomical Journal, vol. 14,
Astronomy and Astrophysics
Astronomy
4
Binary Stars, Mass Ratios, Stellar Evolution, Stellar Mass, Stellar Models
Scientific paper
A star can be identified as a binary by observing the separation between the components or their common proper motion, or by taking micrometer measurements. Orbital parameters are known through interferometry and statistical material on binaries provides evidence for theories on star formation. Different populations of binaries exist that vary in their orbital period, indicating that different formation processes are at work. Where the assumed Jeans mass nearly equals the total mass of the system, a single nucleus will be surrounded by matter organizing itself into one or more companions or into planets. Examination of the mass ratio of binary systems is biased toward detection of equal mass systems, but additional data may correct this. A discontinuity appears to exist between stellar/stellar and stellar/planetary mass ratios, but this must be regarded with much caution because of the increasing difficulty of observing the variability of radial velocity.
Dommanget Jean
van Dessel Edwin L.
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