The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements

Abstract

We have obtained high resolution images of the central regions of 14 reverberation-mapped active galactic nuclei (AGN) using the Hubble Space Telescope Advanced Camera for Surveys High Resolution Camera to account for host-galaxy starlight contamination of measured AGN luminosities. We measure the host-galaxy starlight contribution to the continuum luminosity at 5100 A through the typical ground-based slit position and geometry used in the reverberation-mapping campaigns. We find that removing the starlight contribution results in a significant correction to the luminosity of each AGN, both for lower luminosity sources, as expected, but also for the higher luminosity sources such as the PG quasars. After accounting for the host galaxy starlight, we revisit the well-known broad-line region radius--luminosity relationship for nearby AGN. We find the power-law slope of the relationship for the H beta line to be 0.518 +/- 0.039, shallower than previously reported and consistent with the slope of 0.5 expected from the naive theoretical assumption that all AGN have, on average, the same ionizing spectrum and the same ionization parameter and gas density in the H beta line-emitting region.

27 pages, 5 tables, 4 figures, accepted to ApJ; full resolution figures available at http://www.astronomy.ohio-state.edu/~bentz/astroph0602412.html

References in corpus (27)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Detailed Structural Decomposition of Galaxy Images
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• Cosmic-Ray Rejection by Laplacian Edge Detection
• The Relationship Between Luminosity and Broad-Line Region Size in Active Galactic Nuclei
• Linear Regression for Astronomical Data with Measurement Errors and Intrinsic Scatter
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• Measuring the black hole masses of high redshift quasars
• Determining Central Black Hole Masses in Distant Active Galaxies
• Locally Optimally Emitting Clouds and the Origin of Quasar Emission Lines
• Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. I. A Reverberation-Based Measurement of the Black Hole Mass
• Optical Continuum and Emission-Line Variability of Seyfert 1 Galaxies
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• X-Ray and Optical Variability in NGC 4051 and the Nature of Narrow-Line Seyfert 1 Galaxies
• Early Growth and Efficient Accretion of Massive Black Holes at High Redshift
• Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XVI. A Thirteen-Year Study of Spectral Variability in NGC 5548
• The Mass of the Central Black Hole in the Seyfert Galaxy NGC 3783
• Black hole mass estimation with a relation between the BLR size and emission line luminosity of AGN
• Locally Optimally-Emitting Clouds and the Variable Broad Emission Line Spectrum of NGC 5548
• Steps toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XII. Ground-Based Monitoring of 3C 390.3
• Multiwavelength observations of short time-scale variability in NGC 4151. II. Optical observations
• Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. VI. Variability of NGC 3783 from ground-based data
• Modeling Variable Emission Lines in AGNs: Method and Application to NGC 5548
• Black Hole Masses in Three Seyfert Galaxies
• Bloated Stars as AGN Broad Line Clouds: The Emission Line Spectrum
• Monitoring of the optical and 2.5-11.7 micron spectrum and mid-IR imaging of the Seyfert 1 galaxy Mrk279 with ISO

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