Steep balmer decrement in quasars and seyfert I galaxies and its origin

Details Steep balmer decrement in quasars and seyfert I galaxies and its origin Steep balmer decrement in quasars and seyfert I galaxies and its origin

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007acasn..48..130d&link_type=abstract

Acta Astronomica Sinica, vol. 48, no. 2, p.130-138

Physics

Radiation Mechanism: General, Line: Formation, Galaxies: Quasars, Galaxies: Seyfert, Physical Data And Processes: Black Hole Physics

Scientific paper

Observations of QSOs and Seyfert Is show an anomalously steep Balmer Decrement, which is in contradiction to the prediction of the traditional recombination theory. This is a long standing puzzle in past three decades in the studies of AGNs. In this paper, we provide an alternative way to solve this puzzle by using a newly recognized line emission mechanism, i.e., the `Cerenkov line-like radiation'. For this purpose, we collect a number of AGNs samples, including the QSOs and Seyfert Is, for which the intensities of hydrogen Balmer lines were measured and given out in past thirty years. We complete the calculations of the Balmer decrement by use of the improved formula describing the Cerenkov line intensity, to fit the observations. The coincidence between theory and observations is excellent. We therefore argue that the broad hydrogen lines of QSOs and Seyfert Is predominantly arise from the Cerenkov line-like radiation of the relativistic electrons. If this suggestion is further confirmed in future, the scenario of the environment around the central supermassive black hole will be markedly changed.

Affiliated with

Also associated with

No associations

Rating

Steep balmer decrement in quasars and seyfert I galaxies and its origin 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 Steep balmer decrement in quasars and seyfert I galaxies and its origin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steep balmer decrement in quasars and seyfert I galaxies and its origin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1680165