Disk-Jet Connection in Cygnus X-3

Details Disk-Jet Connection in Cygnus X-3 Disk-Jet Connection in Cygnus X-3

2001-11-21

arxiv.org/abs/astro-ph/0111416v2

Astronomy and Astrophysics

Astrophysics

Accepted in A&A Letters. Major revioson of discussion, minor revision of tables and figures

Scientific paper

10.1051/0004-6361:20020091

We present the results of a detailed correlation study between the soft X-ray, hard X-ray, and radio emission (obtained from RXTE ASM, 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.

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