Properties of X-ray Flux of Jets During 2005 Outburst of Swift J1753.5-0127 Using TCAF Solution

TL;DR

This study analyzes the 2005 outburst of Swift J1753.5-0127, revealing persistent hard spectral states, significant jet activity, and quantifying the jet's X-ray contribution using the TCAF model.

Contribution

It applies the TCAF model to estimate accretion flow parameters and isolates the jet's X-ray emission contribution during the outburst.

Findings

The source remained in hard spectral states throughout the outburst.

Up to 32% of X-ray flux originated from the jet base on certain days.

The TCAF model effectively estimates accretion parameters and jet contributions.

Abstract

Galactic black hole candidate Swift~J1753.5-0127 was discovered on 2005 June 30 by the Swift Burst Alert Telescope. We study the accretion flow properties during its very first outburst through careful analysis of the evolution of the spectral and the temporal properties using the two-component advective flow (TCAF) paradigm. RXTE proportional counter array spectra in $2.5-25$ keV are fitted with the current version of the TCAF model fits file to estimate physical flow parameters, such as two component (Keplerian disk and sub-Keplerian halo) accretion rates, properties of the Compton cloud, probable mass of the source, etc. The source is found to be in harder (hard and hard-intermediate) spectral states during the entire phase of the outburst with very significant jet activity. Since in TCAF solution, the model normalization is constant for any particular source, any requirement of significantly different normalization to have a better fit on certain days would point to X-ray contribution from components not taken into account in the current TCAF model fits file. By subtracting the contribution using actual normalization, we derive the contribution of X-rays from the jets and outflows. We study its properties, such as its magnitude and spectra. We find that on some days, up to about 32\% X-ray flux is emitted from the base of the jet itself.