Tübitak ulusal gözlemevi verilerini kullanarak v2275 cyg ve rw'nin ccd fotometrisi ve zaman serisi analizi

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, Türkiye

Tezin Onay Tarihi: 2004

Tezin Dili: İngilizce

Öğrenci: Mustafa Arda Yılmaz

Danışman: ŞÖLEN BALMAN

Özet:

In this work, we analyze the data from 1.5 m telescope of Tubitak National Observatory (TUG) for two objects V2275 Cyg and RW UMi. After applying aperture and PSF photometry to the CCD data, we derive the light curve of the objects. Also we apply discrete Fourier transform and Scargle time series analysis to obtain power spectrum and search for periodicities in their power spectra in which both systems show interesting properties. We discover large variations in V2275 Cyg due to irradiation effects on the secondary, with an orbital period Porb = 0.316±0.007 day. We also detect a very short orbital period for RW UMi Porb = 1.96±0.073h and also a spin period Pspin = 1.29±0.036h in the presence of several beat frequencies. These results (if con?rmed) lead us to say that RW UMi can be an intermediate of polar system.