BEYOND THE STANDARD MODEL OF THE DISC–LINE SPECTRAL PROFILES FROM BLACK HOLE ACCRETION DISCS

Authors

  • Vjaceslav Sochora Astronomical Institute, Academy of Sciences of the Czech Republic, Bocní II 1401, Prague
  • Vladimír Karas Astronomical Institute, Academy of Sciences of the Czech Republic, Bocní II 1401, Prague
  • Jirí Svoboda Astronomical Institute, Academy of Sciences of the Czech Republic, Bocní II 1401, Prague
  • Michal Dovciak Astronomical Institute, Academy of Sciences of the Czech Republic, Bocní II 1401, Prague

DOI:

https://doi.org/10.14311/AP.2014.54.0301

Abstract

The strong gravitational field of a black hole has distinct effects on the observed profile of a spectral line from an accretion disc near a black hole. The observed profile of the spectral line is broadened and skewed by a fast orbital motion and redshifted by a gravitational field. These effects can help us to constrain the parameters of a system with a black hole, both in active galactic nuclei and in a stellar-mass black hole. Here we explore the fact that an accretion disc emission can be mathematically imagined as a superposition of radiating accretion rings that extend from the inner edge to the outer rim of the disc, with some radially varying emissivity. In our work, we show that a characteristic double-horn profile of several radially confined (relatively narrow) accretion rings or belts could be recognized by the planned instruments onboard future satellites (such as the proposed ESA Large Observatory for X-ray Timing).

Downloads

Download data is not yet available.

Downloads

Published

2014-08-31

How to Cite

Sochora, V., Karas, V., Svoboda, J., & Dovciak, M. (2014). BEYOND THE STANDARD MODEL OF THE DISC–LINE SPECTRAL PROFILES FROM BLACK HOLE ACCRETION DISCS. Acta Polytechnica, 54(4), 300–304. https://doi.org/10.14311/AP.2014.54.0301

Issue

Section

Articles