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Astron. Astrophys. 338, 988-994 (1998)
Studies of the flickering in cataclysmic variables
V. The recurrent nova T Coronae Borealis
Radoslav K. Zamanov 1 and
Albert Bruch 2
1 National Astronomical Observatory Rozhen, P.O. Box 136,
BG-4700 Smolyan, Bulgaria (e-mail: rozhen@sm.unacs.bg)
2 Laboratório Nacional de Astrofísica,
CP 21, BR-37500-000 Itajubá - MG, Brazil (e-mail:
albert@lna.br)
Received 27 May 1997 / Accepted 27 May 1998
Abstract
The flickering activity in the recurrent nova and symbiotic star
T CrB is investigated using light curves taken in the Johnson
U band. In order to be able to compare the results with those
of other CVs the contribution of the red giant secondary is first
estimated and subtracted. It is found to be ![[FORMULA]](img1.gif)
10%
on the average. The U band flux varies considerably over long
time scales, but the ratio of the flux of the flickering light source
and the quiet part of the primary remains constant. This is in
contrast to the behaviour of dwarf novae around the outburst cycle. A
wavelet analysis reveils a remarkable constancy of the distribution of
flickering energy among different time scales as compared to other
CVs. With the exception of the particular, not well understood feature
that the activity can disappear temporarily, flickering in T CrB
is on the whole indistinguishable from that in normal cataclysmic
variables, in particular in classical novae, although the geometrical
dimensions are very different. This is one more indication that the
vicinity of a white dwarf, being of similar size in all CVs
independent of their absolute dimensions, is the site of the
flickering.
Key words: stars: individual:
T CrB 
stars: novae, cataclysmic
variables
stars: binaries: symbiotic
Send offprint requests to: R.K. Zamanov
Contents
- 1. Introduction
- 2. Observations
- 3. Results and discussion
- 4. Conclusions
- Acknowledgements
- References
© European Southern Observatory (ESO) 1998
Online publication: September 17, 1998
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