Observed Orbital Eccentricities

Details Observed Orbital Eccentricities Observed Orbital Eccentricities

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...629..507a&link_type=abstract

The Astrophysical Journal, Volume 629, Issue 1, pp. 507-511.

Astronomy and Astrophysics

Astronomy

12

Stars: Binaries: Spectroscopic, Stars: Binaries: Visual, Stellar Dynamics

Scientific paper

For 391 spectroscopic and visual binaries with known orbital elements and having B0-F0 IV or V primaries, we collected the derived eccentricities. As has been found by others, those binaries with periods of a few days have been circularized. However, those with periods up to about 1000 or more days show reduced eccentricities that asymptotically approach a mean value of 0.5 for the longest periods. For those binaries with periods greater than 1000 days their distribution of eccentricities is flat from 0 to nearly 1, indicating that in the formation of binaries there is no preferential eccentricity. The binaries with intermediate periods (10-100 days) lack highly eccentric orbits.

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