NDLI: Comparative analysis of photometric variability of TT ARI in the years 1994

Content Provider	Springer Nature Link
Author	Belova, A. I. Suleimav, V. F. Bikmaev, I. F. Khamitov, I. M. Zhukov, G. V. Senio, D. S. Belov, I. Yu. Sakhibullin, N. A.
Copyright Year	2013
Abstract	We present the results of photometric observations of a bright cataclysmic variable TT Ari with an orbital period of 0.13755 days. CCD observations were carried out with the Russian-Turkish RTT 150 telescope in 2001 and 2004 (13 nights). Multi-color photoelectric observations of the system were obtained with the Zeiss 600 telescope of SAO RAS in 1994–1995 (6 nights). In 1994–1995, the photometric period of the system was smaller than the orbital one (0 . d 132 and 0 . d 134), whereas it exceeded the latter (0 . d 150 and 0 . d 148) in 2001, 2004. An additional period exceeding the orbital one (0 . d 144) is detected in 1995 modulations. We interpret it as indicating the elliptic disc precession in the direction of the orbital motion. In 1994, the variability in colors shows periods close to the orbital one (0 . d 136, b-v), as well as to the period indicating the elliptic disk precession (0 . d 146, w-b). We confirm that during the epochs characterized by photometric periods shorter than the orbital one, the quasi-periodic variability of TT Ari at time scales about 20 min is stronger than during epochs with long photometric periods. In general, the variability of the system can be described as a “red” noise with increased amplitudes of modulations at characteristic time scales of 10–40 min.
Starting Page	111
Ending Page	125
Page Count	15
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	39
Issue Number	2
e-ISSN	15626873
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2013-02-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	binary stars cataclysmic variables TT Ari Astronomy, Observations and Techniques Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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