Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..717t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 15, 1983, p. 717-724.
Astronomy and Astrophysics
Astrophysics
36
Cepheid Variables, Dwarf Stars, Eclipsing Binary Stars, Stellar Spectrophotometry, Astrometry, Light Curve, Line Spectra, Orbital Elements, Stellar Mass, Stellar Rotation
Scientific paper
Reticon observations at 6400 A that clearly show weak secondary lines are reported. The secondary velocity curve and a revised primary velocity curve are determined, providing accurate spectroscopic orbital elements and masses. The radius of the primary is found to be unusually small for its A1 V spectral type, but the possibility that this might be due to uncertainty in the solution of the light curve cannot be excluded. The period of the predicted rate of periastron advance is 7400 + or - 400 yr. It is dominated by the relativistic contribution, and a knowledge of the precise masses makes it possible for this contribution to be predicted with an accuracy of 1 percent. Prospects for photometric measurement of the rate of periastron advance are considered good. It is pointed out that if measurement of this advance were to be supplemented by an accurate determination of the radii, it would provide a more demanding, and therefore more interesting, check of the relativistic periastron advance in binaries.
No associations
LandOfFree
Secondaries of eclipsing binaries. V - EK Cephei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Secondaries of eclipsing binaries. V - EK Cephei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secondaries of eclipsing binaries. V - EK Cephei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-741621