Vol 20, No 3

Inference on disk-jet connection of MAXI J1836–194 from spectral analysis with the TCAF solution

Arghajit Jana, Dipak Debnath, Sandip K. Chakrabarti, Debjit Chatterjee


Abstract Galactic transient black hole candidate (BHC) MAXI J1836–194 was discovered on 2011 Aug 30, by MAXI/GSC and Swift/BAT. The source activity during this outburst continued for ∼ 3 months before entering into the quiescent state. It again became active in March 2012 and continued for another ∼ 2 months. In this paper, 3 − 25 keV RXTE/PCA spectra from the 2011 outburst and 0.5 − 10.0 keV Swift/XRT data during its 2012 outburst are analyzed with the two-component advective flow (TCAF) model based fits files in XSPEC. We calculate the X-ray contributions coming from jets/outflow using a newly developed method based on the deviation of the TCAF model normalization. We also study the correlation between observed radio and estimated jet X-ray fluxes. The correlation indices (b) are found to be 1.79 and 0.61, when the 7.45 GHz Very Large Array (VLA) radio flux is correlated with the total X-ray and jet X-ray fluxes in 3 − 25 keV range respectively. It has been found that the jet contributes in X-rays up to a maximum of 86% during its 2011 outburst. This makes the BHC MAXI J1836–194 strongly jet dominated during the initial rising phase.


Keywords X-Rays: binaries — stars individual: (MAXI J1836–194) — stars: black holes — accretion, accretion disks — ISM: jets and outflows — radiation: dynamics

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