Daftar Publikasi dengan Tag: variable star

Karya Tulis Konferensi Journal of Physics: Conference Series Vol. 1127 conference 1, Februari 2019

Light curve analyses of eclipsing binary system ASAS 172533–1221.4

Light curve analyses of eclipsing binary system ASAS 172533–1221.4

Using the data taken from our 0.36 m f/7.2 robotic telescope, we performed a very first light curve (LC) analyses of eclipsing binary ASAS 172533-1221.4, one of target stars which is part of program stars in our variable star survey project. The LC of this star was constructed by using $\texttt{LEMON}$, a semi-automatic photometric pipeline written in Python. We refined a Time of Minima (ToM, $T_ 0$) and variability period of this system, $P$ and updated its ephemerides as min I (HJD) = 2457200.255578 + 0.678861 $\times$ E. The LC modeling of the system was conducted with the $\texttt{PHOEBE}$ (PHysics Of Eclipsing BinariEs) software built on top of the widely used WD program . The assorted LC modeling solutions are shown as follows: mass ratio $q = 0.811 \pm 0.009$, inclination $i = 70.62 \pm 0.01^\circ$, temperature of primary and secondary component $T_ 1 = 5559.23 \pm 83.51$ K and $T_ 2 = 3871.64 \pm 43.66$ K, respectively, and modified Kopal potentials which are a function of primary's and secondary's radii $\Omega_ 1 = 3.436 \pm 0.018$ and $\Omega_ 2 = \Omega_ \mathrm{cr} = 2.980$, respectively. It is concluded that ASAS 1725533-1221.4 is found to be near-contact system with almost similar size between primary and secondary components, with its secondary component is already filling its Roche lobe.

Agus T. P. Jatmiko , Muhammad Yusuf , M. Putra

binary variable star photometry
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