MG15 - Talk detail

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Galactic black hole candidates often show jets and outflows during their outburst. Jets are generally observed in all wavelengths: from radio to high energy X-ray and gamma rays, though they are more prominent in radio. The coupling between jets and accretion disk is observed. Compact or continuous jet is generally observed in low hard state, while blobby jet or desecrate ejection is observed in intermediate spectral states. Jets quenched in soft state. A tight correlation exist between observed radio and X-ray luminosities if jet is compact. However for blobby jet, the correlation is non-trivial. Recently, we have developed a new method to calculate X-ray contribution from jets or outflows based on spectral analysis with the two-component advective flow (TCAF) solution. Using this method, so far we have calculated jet X-ray fluxes for BHC MAXI J1836-194 and Swift J1753.5-0127 on a daily basis. Jets contribution in X-rays are found to be maximum up to 86% and 32% respectively for two sources when the jets are strong. We have also studied nature of the jets from radio/X-ray correlation. During entire period of 2011 & 2012 outbursts and intermediate quiescent phase, MAXI J1836-194 shows compact jets, while Swift J1753.5-0127 does not show compact jet always. During 2005 outburst, Swift J1753.5-0127 shows compact jets in hard states, while during hard-intermediate states jet is found to be partially blobby. References: 1) Chakrabarti, S.K., & Titarchuk, L.G., 1995, ApJ, 455, 623 2) Debnath, D., Chakrabarti, S.K., & Mondal, S., 2014, MNRAS, 440, L121 3) Jana, A., Chakrabarti, S. K., & Debnath, D., 2017, ApJ, 850, 91 4) Jana, A., Debnath, D., Chakrabarti, S. K., & Chatterjee, D., 2018, ApJ (submitted)

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