Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277..495k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 15, 1984, p. 495-500.
Astronomy and Astrophysics
Astrophysics
16
Quasars, Seyfert Galaxies, Spectral Line Width, X Ray Sources, Balmer Series, H Lines, Lyman Alpha Radiation, Photoionization
Scientific paper
Baldwin (1977) has inferred that the Ly-alpha/H-alpha line ratio in quasars was a factor of 10 lower than predicted by case B recombination theory, and direct observations of the Ly-alpha line in low-redshift quasars and Seyfert galaxies and of the Balmer lines in high-redshift quasars have confirmed this discrepancy. The present investigation is concerned with the Ly-alpha/H-alpha and Fe II/H-beta line ratios of a larger sample of quasars and Seyfert galaxies, taking into account the possibility of X-ray heating. Attention is given to details regarding the data set and to tests of X-ray heating in the broad-line region. The significance of the tests for the predictions of a model considered by Kwan and Krolik (1981) is evaluated.
No associations
LandOfFree
Observational tests of X-ray heating in the broad-line region of quasars and Seyfert galaxies 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 Observational tests of X-ray heating in the broad-line region of quasars and Seyfert galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational tests of X-ray heating in the broad-line region of quasars and Seyfert galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1857697