Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...165...31b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 165, no. 1-2, Sept. 1986, p. 31-38.
Astronomy and Astrophysics
Astrophysics
8
Interstellar Matter, Line Spectra, Molecular Clouds, Quasars, Seyfert Galaxies, Spectral Line Width, Astronomical Models, Elliptical Orbits, Kepler Laws, Poynting-Robertson Effect, Protostars, Radiation Pressure
Scientific paper
The authors present quasar broad emission line profile calculations for spherically symmetric ensembles of flattened broad-line clouds in elliptical Keplerian orbits. In general, they find that high eccentricity monoenergetic orbital ensembles tend to provide more acceptable profiles than low eccentricity monoenergetic ensembles. The investigation of elliptical cloud orbits evolving under the influence of Poynting-Robertson drag or drag from an intercloud medium shows that acceptable line profiles naturally result from the decay of initially monoenergetic, high eccentricity ensembles (i.e. newly captured clouds) independent of the assumed emission anisotropy, provided the drag is not so great as to cause the immediate capture or disruption of the clouds.
Bradley Eliza S.
Puetter Richard C.
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