Accretion flow dynamics during 1999 outburst of XTE J1859+226-modeling of broadband spectra and constraining the sourcemass

We examine the dynamical behavior of accretion flow around XTE J1859+226 during the 1999 outburst by analyzing the entire outburst data (similar to 166 days) from RXTE Satellite. Towards this, we study the hysteresis behavior in the hardness intensity diagram (HID) based on the broadband (3-150 keV) spectral modeling, spectral signature of jet ejection and the evolution of Quasi-periodic Oscillation (QPO) frequencies using the two-component advective flow model around a black hole. We compute the flow parameters, namely Keplerian accretion rate (<(m)over dot>(d)), sub-Keplerian accretion rate (<(m)over dot>(h)), shock location (r(s)) and black hole mass (M-bh) from the spectral modeling and study their evolution along the q-diagram. Subsequently, the kinetic jet power is computed as L-jet(obs) similar to 3-6 x 10(37) erg s(-1) during one of the observed radio flares which indicates that jet power corresponds to 8-16% mass outflow rate from the disc. This estimate of mass outflow rate is in close agreement with the change in total accretion rate (similar to 14%) required for spectral modeling before and during the flare. Finally, we provide a mass estimate of the source XTE J1859+226 based on the spectral modeling that lies in the range of 5.2-7.9 M-circle dot with 90% confidence.