The continuum of QSOs and the nature of the broad 3600 A emission feature

Details The continuum of QSOs and the nature of the broad 3600 A emission feature The continuum of QSOs and the nature of the broad 3600 A emission feature

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257..487p&link_type=abstract

Astrophysical Journal, Part 1, vol. 257, June 15, 1982, p.487-498. NSF-supported research.

Astronomy and Astrophysics

Astronomy

25

Astronomical Spectroscopy, Continuous Spectra, Emission Spectra, Quasars, Radio Sources (Astronomy), Gamma Ray Astronomy, H Alpha Line, Stellar Models, Synchrotron Radiation, Ultraviolet Astronomy

Scientific paper

Models to explain the shape of the 3600 A blue emission feature in quasar spectra are derived that depend only on a nonthermal, featureless power-law and Balmer continuum from emission-line clouds. These models require a rather flat power-law component with a flux density proportional to the -0.5 power of the frequency to explain data observed on 3C 273 at visual and ultraviolet wavelengths. The required synchrotron-self-Compton radiation is consistent with X-ray and gamma-ray emission. The models are an alternative to those requiring an entirely new component of visual and ultraviolet emission from a thermal accretion region.

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