Images and Spectra of Time Dependent Two Component Advective Flow in Presence of Outflows

TL;DR

This paper presents time-dependent images of advective accretion flows around Schwarzschild black holes, incorporating cooling, jets, and outflows, to aid in observing event horizons in high accretion rate systems.

Contribution

It introduces a model for time-dependent imaging of disk-jet systems including cooling and outflows, extending previous static studies.

Findings

Time-dependent images can obscure the black hole horizon unless in specific states.

Soft states with no jets reveal the horizon more clearly.

Results are applicable to high accretion rate supermassive black holes in active galaxies.

Abstract

Two Component Advective Flow (TCAF) successfully explains the spectral and tem- poral properties of outbursting or persistent sources. Images of static TCAF with Compton cloud or CENtrifugal pressure supported Boundary Layer (CENBOL) due to gravitational bending of photons have been studied before. In this paper, we study time dependent images of advective flows around a Schwarzschild black hole which include cooling effects due to Comptonization of soft photons from a Keplerian disks well as the self-consistently produced jets and outflows. We show the overall image of the disk-jet system after convolving with a typical beamwidth. A long exposure image with time dependent system need not show the black hole horizon conspicuously, un- less one is looking at a soft state with no jet or the system along the jet axis. Assuming these disk-jet configurations are relevant to radio emitting systems also, our results would be useful to look for event horizons in high accretion rate Supermassive Black Holes in Seyfert galaxies, RL Quasars.