Absolute dimensions of eclipsing binaries. XV - EM Carinae

Details Absolute dimensions of eclipsing binaries. XV - EM Carinae Absolute dimensions of eclipsing binaries. XV - EM Carinae

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213..183a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. 183-194. Research supported by the Statens Naturv

Astronomy and Astrophysics

Astronomy

45

Early Stars, Eclipsing Binary Stars, Light Curve, Radial Velocity, Stellar Evolution, Stellar Spectrophotometry, Absorption Spectra, Apsides, Ephemeris Time, Spectral Line Width, Stellar Orbits, Ultraviolet Astronomy

Scientific paper

High-SNR coude spectrograms and uvby light curves of EM Car are presented which have enabled the physical properties of its components to be determined with higher accuracy than that previously obtained for other O-type binaries. The observations reveal a slightly eccentric orbit and the presence of apsidal motion with a period of 42 years. It is suggested that the system is still within the lower to middle part of the main sequence band, at an age of about 4.5-5.0 x 10 to the 6th yr.

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