Gas velocities in the inner NLR - Virial with inflow?

Details Gas velocities in the inner NLR - Virial with inflow? Gas velocities in the inner NLR - Virial with inflow?

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254..607w&link_type=abstract

In: Testing the AGN paradigm; Proceedings of the 2nd Annual Topical Astrophysics Conference, Univ. of Maryland, College Park, Oc

Astronomy and Astrophysics

Astrophysics

5

Active Galactic Nuclei, Flow Velocity, Forbidden Bands, Gas Flow, Spectral Line Width, Virial Theorem, Emission Spectra, Oxygen Ions, Oxygen Spectra, Radial Velocity, Velocity Distribution

Scientific paper

The plausibility of a gravitational origin for entire forbidden line profiles (core, base, and wings) is explored. Profile kurtosis is used to estimate the velocity gradient across the narrow line region (NLR), yielding V varies as r exp -beta with beta of about 0.1-0.3. Within a virial framework, this provides constraints on the form of the nuclear potential. Profile asymmetry is employed to estimate radial gas velocities (0.2-0.9). These velocities are attributed to free fall across modest distances through plausible potentials. It is argued that a gravitational origin for the entire forbidden line profile seems possible.

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