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The First Light Curve Solutions and Period Changes of EW Psc and HN Psc

The first light curve solutions of the stars EW and HN in Pisces constellation are presented. Photometry, and its' periodic changes are calculated and discussed. The analysis of O-C diagram done by MCMC approach in OCFit code and the new ephemeris provided for two binary systems. The light curve solutions obtained. The results show that EW Psc is a near contact eclipsing binary system with a photometric mass ratio q = 0.587, and the fillout factor -0.034 and -0.018 for primary and secondary components, respectively. The solution results also show that the system HN Psc is a weak-contact W UMa eclipsing binary with a photometric mass ratio q = 0.853, and with fillout factor 5.6%. The light curves solutions required the cold spot accounting for the O'Connell effect.

preprint2020arXivOpen access
F. DavoudiA. PoroF. AlicavusJ. RahimiE. LashgariM. GhanbarzadehchaleshtoriA. BoudeshS. HoshyarD. AsgarianN. PilghushS. ModarresS. EbadiA. SojoudizadehS. Z. AzarniurH. KaramiA. Dehghani Ghanatghestani
astro-ph.SR
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F. DavoudiA. PoroF. AlicavusJ. RahimiE. LashgariM. GhanbarzadehchaleshtoriA. BoudeshS. HoshyarD. AsgarianN. PilghushS. ModarresS. EbadiA. SojoudizadehS. Z. AzarniurH. KaramiA. Dehghani Ghanatghestani

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