Author(s)

Davood Manzoori^1,2, Salar Abbasvand¹, Vahid Abbasvand^3,4

¹Department of Physics, University of Mohaghegh Ardabili, Ardabil, Iran.
²Imam Khomeini International University of Qazvin, Qazvin, Iran.
³Astrophysics Department, Faculty of Physics, University of Tabriz, Tabriz, Iran.
⁴Research Institute for Astronomy and Astrophysics of Maragha, Maragha, Iran.

The first photoelectric light curve analysis of the TT And system in a broad band filter (400 - 700 nm) was carried out using the PHOEBE program. The absolute dimensions of the system are determined and its evolution is discussed. The most distinct feature of the system is a comparatively very low mass of the cooler component i.e. M₂ = 0.26M⊙. Moreover, using the Observed-minus-Calculated data, the period changes of the system are studied, which reveal the presence of a third body orbiting the system with a period P₃ = 63.89 yr, superimposed on which is a secular period increase, which is ascribed to mass transfer with a rate −7.60 × 10⁻¹² M⊙ yr⁻¹ from the cooler secondary component.

Binaries: Eclipsing, Stars: Evolution, Stars: Individual (TT And)

Manzoori, D. , Abbasvand, S. and Abbasvand, V. (2017) The Light Curve and the Orbital Period Variations of Binary System TT Andromedae. International Journal of Astronomy and Astrophysics, 7, 112-123. doi: 10.4236/ijaa.2017.72009.