Astrophysics and Space Science

, Volume 291, Issue 1, pp 85–96

Study of photoelectric observations of the eclipsing binary system FZ-Delphinus


  • M.A. Hanna
    • National Research Institute of Astronomy and Geophysics (NRIAG)
  • N.S. Awadalla
    • National Research Institute of Astronomy and Geophysics (NRIAG)

DOI: 10.1023/B:ASTR.0000029995.26851.00

Cite this article as:
Hanna, M. & Awadalla, N. Astrophysics and Space Science (2004) 291: 85. doi:10.1023/B:ASTR.0000029995.26851.00


Photoelectric observations in B and V for the FZ Del system are presented and its light curves are analyzed. Absolute parameters are obtained. The system shows a near contact subgaint secondary component with a likely K1 spectral type. The O-C curve is presented and probably a secular orbital period variations is detected on a timescale of about 6.9×106 yrs, suggesting thermal timescale mass transfer. A new light elements for the system have been obtained. The system can be considered as an early stage of conservative case of mass transfer.

binary starseclipsingclosephotometrylight curveabsolute parametersFZ-Del
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© Kluwer Academic Publishers 2004