Optically thick radiatively driven shocks near QSOs

Details Optically thick radiatively driven shocks near QSOs Optically thick radiatively driven shocks near QSOs

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..245f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 203, Apr. 1983, p. 245-252.

Physics

1

Gas Dynamics, Interstellar Gas, Quasars, Radiation Pressure, Shock Wave Propagation, Emission Spectra, Gas Ionization, Line Spectra, Optical Thickness, Pressure Effects, Propagation Velocity

Scientific paper

The dynamics of gas surrounding a QSO and acted on by radiation pressure is studied. Ionization equilibrium is used to derive a condition for the gas to become optically thick in the continuum. It is shown that once this happens, there exists a very simple flow in which a shock moves away from the QSO with constant speed. The gross features of this flow are very insensitive to the details of the input physics. It is suggested that such a flow can explain the emission lines and some of the absorption lines in the spectra of QSOs.

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