Accretion - Ejection mechanism of MAXI J1836-194 with the TCAF solution
Abstract
MAXI J1836-194 showed its first activity in Aug 2011. It was active for 3 months before it went to quiescent state for 4 months. It renewed its activity again in March 2012 for 2 months. We have analyzed spectral data of 3-25 keV RXTE/PCA for the 2011 outburst and 0.5-10.0 keV Swift/XRT for 2012 outburst with the current fits file of the two component advective flow (TCAF) model in XSPEC. The detailed accretion flow properties of the source during its 2011 outburst has been done from spectral and temporal analysis under TCAF paradigm. Based on the variation of the TCAF model fitted physical flow parameters and nature of observed quasi-periodic oscillations (QPOs), we classified entire outburst into two harder spectral states: hard (HS) and hard-intermediate (HIMS), which are observed in the sequence of HS(Ris.)-> HIMS(Ris.)-> HIMS(Dec.)-> HS(Dec.). We estimated mass of the source from our TCAF model fitted spectral analysis. We also have estimated contribution of jet X-ray fluxes with a newly developed method based on TCAF model. We find that the jet contributes in the X-ray as high as 86% of total intensity during its 2011 outburst. We find jet X-ray (F_{ouf}) correlates with radio flux (F_{R}) as F_{R} F_{out}^{0.61}, which is similar to standard correlation. However, when the correlation is done with total X-ray, we find unusual steep index sim 1.82. This could be due to the surrounding clouds from the excretion disk of the companion Be star. In the correlation plots, we find L_{R} - L_{x} points lie on the jet line for the 2012 outburst and quiescent state indicating observed radio flux is from earlier epoch. Another reason could be that the quiescent and the 2012 outburst is dominated by radiatively inefficient sub-Keplerian flow, the phases are highly jet dominated.Chakrabarti, S.K., & Titarchuk, L.G., 1995, ApJ, 455, 623Debnath, D., Chakrabarti, S.K., & Mondal, S., 2014, MNRAS, 440, L121Jana, A., Debnath, D., Chakrabarti, S.K., et al., 2016, ApJ, 819, 107Jana, A., Debnath, D., Chakrabarti, S. K., & Chatterjee, D., 2018, ApJ (submitted)
- Publication:
-
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018
- Bibcode:
- 2018cosp...42E1594J