Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ragt.meet..295s&link_type=abstract
In Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars, Opava, 16-18/18-20 September, 2004/2005; S. Hledík an
Astronomy and Astrophysics
Astrophysics
Scientific paper
We report on a research project in which we intend to employ time-dependent spectra of black hole accretion discs and use them in order to map the intensity distribution across the disc surface. The intrinsically narrow spectral line emitted from an accretion disc around a massive central object is broadened by the Doppler effect and gravitational redshift. The changes of spectral line profiles are discussed and examples of predicted spectra are presented. We illustrate the essential differences between the classical calculation and a relativistic approximation. The relativistic approximation for frequency shift g-factor is employed in Pecháček, T., Dovčiak, M., Karas, V. and Matt, G. (2005), The relativistic shift of narrow spectral features from black-hole accretion discs, Astronomy and Astrophysics, 441, pp. 855-861. We also discuss possibilities offered by time-dependent spectra. An idea of mapping of an accretion disc is mentioned. On the basis of knowledge about the spectrum we can determine positions of bright radiating spots on the disc. And consequently from the spot's orbit it is possible to find out the mass of the central object.
No associations
LandOfFree
On time-dependent spectra of black-hole accretion discs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On time-dependent spectra of black-hole accretion discs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On time-dependent spectra of black-hole accretion discs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1468403