On the apsidal motion of MY Cygni

Details On the apsidal motion of MY Cygni On the apsidal motion of MY Cygni

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...498..821w&link_type=abstract

Astronomy and Astrophysics, Volume 498, Issue 3, 2009, pp.821-823

Astronomy and Astrophysics

Astrophysics

1

Stars: Binaries: Eclipsing, Stars: Individual: My Cyg, Stars: Fundamental Parameters

Scientific paper

MY Cygni is a relatively bright eclipsing binary system with a slightly eccentric orbit. Tucker and collaborators found that it shows retrograde apsidal motion in contradiction with theory. Based on a new O-C diagram solution, we concluded that the apsidal motion is prograde in agreement with theory, and its period is about 1400 years. The determined internal structure constant is close to the theoretically expected value. The relativistic effect is significant, being about 18% of the total apsidal motion rate.

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