Images and Spectral Properties of Two Component Advective Flows Around Black Holes: Effects of Photon Bending

Abstract

Two component advective flow (TCAF) successfully explains spectral and timing properties of black hole candidates. We study the nature of photon trajectories in the vicinity of a Schwarzschild black hole and incorporate this in predicting images of TCAF with a black hole at the Centre. We also compute the emitted spectra. We employ a Monte-Carlo simulation technique to achieve our goal. For accurate prediction of the image and the spectra, null trajectories are generated without constraining the motion to any specific plane. Red shift, bolometric flux and corresponding temperature have been calculated with appropriate relativistic consideration. The centrifugal barrier dominated boundary layer or CENBOL near the inner region of the disk which acts as the Compton cloud is appropriately modelled as a thick accretion disk in Schwarzschild geometry for the purpose of imaging and computing spectra. The variations of spectra and image with physical parameters such as the accretion rate (${\dot{m}}_d$) and inclination angle are presented. We show that the gravitational bending effects of photons do change the spectral shape to some extent.

24 pages, 10 figures, Accepted for publication in MNRAS

References in corpus (6)

• Resolved Magnetic-Field Structure and Variability Near the Event Horizon of Sagittarius A*
• Accretion flow dynamics of MAXI J1836-194 during its 2011 outburst from TCAF solution
• Accretion Flow Properties of MAXI J1543-564 During 2011 Outburst from TCAF Solution
• Effects of Compton Cooling on Outflow in a Two Component Accretion Flow around a Black Hole: Results of a Coupled Monte Carlo-TVD Simulation
• Interactive visualization of a thin disc around a Schwarzschild black hole
• Monte-Carlo Simulations of Thermal Comptonization Process in a Two Component Accretion Flow Around a Black Hole in presence of an Outflow

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• Images and Spectra of Time Dependent Two Component Advective Flow in Presence of Outflows
• Detection of QPO Soft Lag during Outburst of Swift J1727.8-1613: Estimation of Instrinsic Parameters from Spectral Study
• Discovery of Jet-Induced Soft Lags of XTE J1550-564 during Its 1998 Outburst
• On the Photon Motion Near a Five-Dimensional Schwarzschild Black Hole