The Mass of the Black Hole in NGC 4593 Using Reverberation Mapping

Details The Mass of the Black Hole in NGC 4593 Using Reverberation Mapping The Mass of the Black Hole in NGC 4593 Using Reverberation Mapping

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..373...23d&link_type=abstract

The Central Engine of Active Galactic Nuclei, ASP Conference Series, Vol. 373, proceedings of the conference held 16-21 October,

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present new observations leading to an improved black hole mass estimate for the Seyfert 1 galaxy NGC 4593 as part of a reverberation mapping campaign conducted at the MDM Observatory, Crimean Astrophysical Observatory, and with the MAGNUM telescope at Haleakala Observatories. Cross-correlation analysis of the Hβ emission-line light curve with the optical continuum light curve reveals an emission-line time delay of τcent=3.73 ± 0.75 days. By combining this time delay with the Hβ line width, we derive a central black hole mass of MBH = (9.8 ± 2.1) × 106 M&sun;, an improvement in precision of a factor of several over past results.

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