Apsidal motion in the eclipsing binaries V1136 Cygni, ES Lacertae, MZ Lacertae and EQ Vulpeculae

Details Apsidal motion in the eclipsing binaries V1136 Cygni, ES Lacertae, MZ Lacertae and EQ Vulpeculae Apsidal motion in the eclipsing binaries V1136 Cygni, ES Lacertae, MZ Lacertae and EQ Vulpeculae

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...334..840w&link_type=abstract

Astronomy and Astrophysics, v.334, p.840-844 (1998)

Astronomy and Astrophysics

Astrophysics

6

Stars: Binaries: Eclipsing, Stars: Individual: V1136 Cyg, Es Lac, Mz Lac, Eq Vul, Stars: Fundamental Parameters

Scientific paper

About thirty new times of minimum light recorded with photoelectric means have been gathered for the early-type eccentric eclipsing binaries V1136 Cyg (P = 3.46(d) , e = 0.33), ES Lac (P = 4.46(d) , e = 0.20), MZ Lac (P = 3.16(d) , e = 0.42) and EQ Vul (P = 9.30(d) , e = 0.36). The O-C diagrams are analyzed using all reliable timings found in the literature and new values for the elements of the apsidal motion are computed. We find new periods of apsidal motion of about 520, 300, 440 and 2200 years for V1136 Cyg, ES Lac, MZ Lac and EQ Vul, respectively.

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