Değen Çiftlerin Yörünge Dönem Değişimleri: HT Vir ve V1073 Cyg

Öz

Bu çalışmada, iki örten değen çift yıldız HT Vir ve V1073 Cyg  sistemlerinin yayınlanmış minimum zamanları kullanarak yörünge dönem değişimlerini inceledik. Sistemlerin O-C analizleri sonucunda, HT Vir sisteminin döneminin arttığı, buna karşın V1073 Cyg sisteminin döneminin azaldığı bulundu. Dönem değişim oranları HT Vir ve V1073 Cyg için sırasıyla 1.33 s/yüzyıl ve -0.43 s/yüzyıl olarak belirlenmiştir. Aynı zamanda her iki sistem için elde edilen O-C grafiklerinde periyodik değişim de görülmektedir. Periyodik değişim, çiftin etrafında olası görülmeyen üçüncü bir bileşenin ile açıklanmıştır.

Anahtar Kelimeler

• Yıldızlar,Örten Çift Yıldızlar,Yakın Çift Yıldızlar,HT Vir,V1073 Cyg

Orbital Period Changes of Contact Binaries: HT Vir and V1073 Cyg

Öz

In this study, we investigated changes in the orbital period of two eclipsing contact binaries HT Vir and V1073 Cyg using all published times of minima. From the analysis of O-C residuals, it was found that HT Vir indicates orbital period increase, whereas the period of V1073 Cyg is decreasing. The changing rates of their periods have been determined to be 1.33 and -0.43 s/century for HT Vir and V1073 Cyg, respectively. In the distribution of O-C graph for HT Vir and V1073 Cyg, periodic variations also exist. Periodic changes were explained as being the result of a hypothetical third companion around the eclipsing pair.

Anahtar Kelimeler

• Stars: eclipsing binaries; close binaries; stars: individual: HT Vir,V1073 Cyg

Kaynakça

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