Journal Article

<i>UBVRI</i> observations of the flickering of RS Ophiuchi at quiescence*

R. K. Zamanov, S. Boeva, R. Bachev, M. F. Bode, D. Dimitrov, K. A. Stoyanov, A. Gomboc, S. V. Tsvetkova, L. Slavcheva-Mihova, B. Spasov, K. Koleva and B. Mihov

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 404, issue 1, pages 381-386
Published in print May 2010 | ISSN: 0035-8711
Published online April 2010 | e-ISSN: 1365-2966 | DOI:
UBVRI observations of the flickering of RS Ophiuchi at quiescence*

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We report observations of the flickering variability of the recurrent nova RS Oph at quiescence on the basis of simultaneous observations in five bands (UBVRI). RS Oph has a flickering source with (UB)0=−0.62 ± 0.07, (BV)0= 0.15 ± 0.10 and (VR)0= 0.25 ± 0.05.

We find for the flickering source a temperature Tfl≈ 9500 ± 500 K, and luminosity Lfl∼ 50–150 L (using a distance of d= 1.6 kpc).

We also find that on a (UB) versus (BV) diagram, the flickering of the symbiotic stars differs from that of the cataclysmic variables. The possible source of the flickering is discussed.

The data are available upon request from the authors.

Keywords: binaries: symbiotic; stars: individual: RS Oph; novae, cataclysmic variables

Journal Article.  3725 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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