Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...275..445n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 275, Dec. 15, 1983, p. 445-460. Sponsorship: United States - Israel Binatio
Astronomy and Astrophysics
Astrophysics
124
Active Galactic Nuclei, Astronomical Spectroscopy, Iron, Line Spectra, Quasars, Stellar Spectra, Absorption Spectra, Fluorescence, Late Stars, Seyfert Galaxies
Scientific paper
The present investigation is concerned with new calculations of Fe II line strengths, taking into account processes which were not considered previously. Attention is given to the theoretical aspects of the problem and ways to explain the energy output in the high energy transitions. A general method is presented for calculating the Fe II line intensities in a model designed to represent quasar photoionized clouds. It is shown that radiative excitation of Fe II, through continuum absorption, is important and can contribute up to about 20 percent of the observed flux in ultraviolet Fe II lines. Optical line strengths increase, and ultraviolet line strengths decrease as the optical depth in Fe II is increased.
Netzer Hagai
Wills Beverley J.
No associations
LandOfFree
Broad emission features in QSOs and active galactic nuclei. I - New calculations of Fe II line strengths 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 Broad emission features in QSOs and active galactic nuclei. I - New calculations of Fe II line strengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Broad emission features in QSOs and active galactic nuclei. I - New calculations of Fe II line strengths will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1802587