Monte-Carlo simulations of the broadband X-ray continuum of SS433

TL;DR

This paper introduces a Monte-Carlo simulation method to model the broadband X-ray spectrum of SS433, considering thermal emission from various regions and comparing results with observations to estimate physical parameters.

Contribution

It presents a novel Monte-Carlo technique based on photon packets for simulating X-ray spectra in complex geometries, applied specifically to SS433.

Findings

Estimated physical parameters of SS433's X-ray emitting regions.

Produced model spectra for different viewing angles.

Validated the simulation method against INTEGRAL observations.

Abstract

We develop a Monte-Carlo technique based on L.B. Lucy's indivisible photon packets method to calculate X-ray continuum spectra of comptonized thermal plasma in arbitrary geometry and apply it to describe the broadband X-ray continuum of the galactic superaccreting microquasar SS433 observed by INTEGRAL. A physical model of the X-ray emitting region is proposed that includes thermal emission from the accretion disk, jets and hot corona where the photons of different origin are comptonized. From comparison with INTEGRAL observations, we estimate physical parameters of the complex X-ray emitting region in SS433 and present model spectra for different viewing angles of the object.