Volume 383, Number 3, MarchI 2002
|Page(s)||L35 - L38|
|Published online||15 March 2002|
Letter to the Editor
Disk-jet connection in Cygnus X-3
Tata Institute of Fundamental Research, Mumbai 400005, India
2 ISRO Satellite Center, Bangalore 560017, India
Corresponding author: M. Choudhury, firstname.lastname@example.org
Accepted: 16 January 2002
We present the results of a detailed correlation study between the soft X-ray, hard X-ray, and radio emission (obtained from , BATSE, and GBI observations, respectively) of the bright radio emitting Galactic X-ray binary Cygnus X-3. We detect a very strong positive correlation between the soft X-ray and radio emission during the low-hard and minor flaring periods of the source, and an anti-correlation between the soft and hard X-ray emissions. We present statistical arguments to suggest that the anti-correlation between the radio and hard X-ray emission, reported earlier, is primarily due to their correlation and anti-correlation, respectively, with the soft X-ray emission. We make a wide band X-ray spectral study using the pointed RXTE observations and detect a pivotal behaviour in the X-ray spectrum. We argue that this X-ray spectral pivoting is responsible for the anti-correlation between the soft and hard X-ray emissions. The strong correlation between the soft X-ray and radio emission suggests a close link between the accreting mechanism, plasma cloud surrounding the compact object and the radio emission.
Key words: accretion / binaries: close / stars: individual: Cygnus X-3 / radio continuum: stars / X-rays: binaries
© ESO, 2002
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