Emission-line variability of Fairall 9 - Determination of the size of the broad-line region and the direction of gas motion

Details Emission-line variability of Fairall 9 - Determination of the size of the broad-line region and the direction of gas motion Emission-line variability of Fairall 9 - Determination of the size of the broad-line region and the direction of gas motion

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...345..637k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 15, 1989, p. 637-646. Research supported by the University of Mic

Astronomy and Astrophysics

Astronomy

51

Black Holes (Astronomy), Emission Spectra, Iue, Quasars, Ultraviolet Spectra, Carbon, Correlation, Error Analysis, Gas Flow, Light Curve, Magnesium, Monte Carlo Method, Seyfert Galaxies, Spectrum Analysis

Scientific paper

A cross-correlation analysis has been performed on 118 IUE spectra of Fairall 9 to determine the size of the broad-line region and the average direction of gas motion. Analysis of the line flux shows that the C IV 1549 A-emitting region is 124 + or - 39 light days from the central source and the Mg II 2800 A-emitting region is 167 + or - 61 light days from the central source. Analysis of the wing flux indicates that the dominant motion for the C IV-emitting gas is inward. The Mg II-emitting gas suggests totally random or chaotic motions. These results indicate that the gas motion in the broad-line region is dominated by gravity close to the central supermassive object. A mass of 7.7 + or - 4.9 x 10 to the 8th solar is indicated for the black hole.

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