Light fluctuation and changes in the orbital period of the close binary 44 i Boo

Details Light fluctuation and changes in the orbital period of the close binary 44 i Boo Light fluctuation and changes in the orbital period of the close binary 44 i Boo

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984acaps...4....1l&link_type=abstract

(Acta Astrophysica Sinica, vol. 4, no. 1, 1984, p. 1-5) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 8, June 1984,

Astronomy and Astrophysics

Astrophysics

1

Eclipsing Binary Stars, Electrophotometry, Light Curve, Ubv Spectra, Orbits, Stellar Mass Ejection

Scientific paper

The authors collected a lot of data about the time of minimum determined in the last 65 years. The values of (O-C) are calculated from the ephemeris MinI = JD_sun;242113.2588+0.26780832mE. The (O-C) curve can be expressed as follows: (O-C) = 0.0238+0.0000102mX+ 0.349cos[0.00449(X+8221.798)]. The difference Δ(O-C) has a periodic variation, its period is 12000 days and the amplitude is 0.005 day. This variation is possibly caused by the material transfer between the star and the common envelope. Some jumps in the observed period are considered to be responsible to some material jets.

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