The Mass of the Black Hole in the Seyfert 1 Galaxy NGC 4593 from Reverberation Mapping

Abstract

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. Cross-correlation analysis of the H_beta emission-line light curve with the optical continuum light curve reveals an emission-line time delay of 3.73 (+-0.75) days. By combining this time delay with the H_beta line width, we derive a central black hole mass of M_BH = 9.8(+-2.1)x10^6 M_sun, an improvement in precision of a factor of several over past results.

22 pages, 3 tables, 5 figures, accepted for publication in ApJ

References in corpus (2)

• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• A Reverberation-Based Mass for the Central Black Hole in NGC 4151

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