Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..375l&link_type=abstract
Astrophysical Journal, Part 1, vol. 224, Sept. 1, 1978, p. 375-380.
Astronomy and Astrophysics
Astronomy
58
Black Holes (Astronomy), Compton Effect, Galactic Nuclei, Seyfert Galaxies, Thermal Emission, X Ray Sources, Astronomical Models, Energy Bands, Flux Density, Galactic Radiation, Luminous Intensity, Synchrotron Radiation
Scientific paper
Motivated by the recent discovery that the Seyfert galaxy NGC 4151 exhibits rapid X-ray flaring, a thermal model for this source is discussed. Inverse Compton scattering of soft photons gives a predicted relationship for rise time versus energy during X-ray flares. A second prediction, arising from the large optical depth to pair production deduced for the source, is that the power-law spectrum should not extend to energies of approximately 500 keV. If it is assumed that NGC 4151 is powered by accretion onto a black hole, then a black-hole mass of no more than about 4 million solar masses is deduced for the source. Constraints on such black-hole models in general are suggested.
Giacconi Ricardo
Lightman Alan P.
Tananbaum Harvey
No associations
LandOfFree
X-ray flares in NGC 4151 - A thermal model and constraints on a central black hole 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 X-ray flares in NGC 4151 - A thermal model and constraints on a central black hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray flares in NGC 4151 - A thermal model and constraints on a central black hole will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-938733