Inflow of Broad-Line Gas Within a Few Light-Days of the Black Hole in NGC 4151

Details Inflow of Broad-Line Gas Within a Few Light-Days of the Black Hole in NGC 4151 Inflow of Broad-Line Gas Within a Few Light-Days of the Black Hole in NGC 4151

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986baas...18..673g&link_type=abstract

Bulletin of the American Astronomical Society, Vol. 18, p.673

Astronomy and Astrophysics

Astronomy

Scientific paper

Analysis of the variability of the wings of broad lines in NGC 4151 reveals the red sides of lines lead the blue side in their variations. This implies that the dominant motion of the broad-line region clouds is inward. Outflow is excluded at > 99.9% confidence. This result puts black-hole accretion models of quasars on an observational footing. The highest velocity high-ionization gas is at only ~ 2 light-days radius. The mass of the black hole can now be reliably determined. It is ~ 6 10^7 solar masses.

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