Reverberation Mapping of IC4329A

Abstract

We present the results of a new reverberation mapping campaign for the broad-lined active galactic nucleus (AGN) in the edge-on spiral IC4329A. Monitoring of the optical continuum with $V-$band photometry and broad emission-line flux variability with moderate-resolution spectroscopy allowed emission-line light curves to be measured for H$\beta$, H$\gamma$, and HeII $\lambda 4686$. We find a time delay of $16.3_{-2.3}^{+2.6}$ days for H$\beta$, a similar time delay of $16.0_{-2.6}^{+4.8}$ days for H$\gamma$, and an unresolved time delay of $-0.6_{-3.9}^{+3.9}$ days for HeII. The time delay for H$\beta$ is consistent with the predicted value from the relationship between AGN luminosity and broad line region radius, after correction for the $\sim 2.4$mag of intrinsic extinction at 5100A. Combining the measured time delay for H$\beta$ with the broad emission line width and an adopted value of $⟨f⟩=4.8$, we find a central supermassive black hole mass of $M_{\mathrm{BH}}=6.8_{-1.1}^{+1.2}\times 10^7{M}_{\odot }$. Velocity-resolved time delays were measured across the broad H$\beta$ emission-line profile and may be consistent with an ''M''-like shape. Modeling of the full reverberation response of H$\beta$ was able to provide only modest constraints on some parameters, but does exhibit agreement with the black hole mass and average time delay. The models also suggest that the AGN structure is misaligned by a large amount from the edge-on galaxy disk. This is consistent with expectations from the unified model of AGNs, in which broad emission lines are expected to be visible only for AGNs that are viewed at relatively face-on inclinations.

12 pages, 6 figures, 3 tables; accepted for publication in ApJ

References in corpus (16)

• The AGN Black Hole Mass Database
• Reverberation mapping of Active Galactic Nuclei: from X-ray corona to dusty torus
• Fuelling Active Galactic Nuclei
• Space Telescope and Optical Reverberation Mapping Project. I. Ultraviolet Observations of the Seyfert 1 Galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope
• Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-Line Analysis for NGC 5548
• Modeling reverberation mapping data I: improved geometric and dynamical models and comparison with cross-correlation results
• Double-peaked profiles: ubiquitous signatures of disks in the Broad Emission Lines of Active Galactic Nuclei
• First Results from the Lick AGN Monitoring Project: The Mass of the Black Hole in Arp 151
• The Broad Line Region and Black Hole Mass of NGC 4151
• Monitoring AGNs with H$\beta$ Asymmetry. III. Long-term Reverberation Mapping Results of 15 Palomar-Green Quasars
• Peculiar-velocity cosmology with Types Ia and II supernovae
• Multi-Wavelength Monitoring and Reverberation Mapping of a Changing Look Event in the Seyfert Galaxy NGC 3516
• Monitoring AGNs with Hβ Asymmetry. II. Reverberation Mapping of Three Seyfert Galaxies Historically Displaying Hβ Profiles with Changing Asymmetry: Mrk 79, NGC 3227, and Mrk 841
• TLDR: Time Lag/Delay Reconstructor
• Detection efficiency and photometry in supernova surveys - the Stockholm VIMOS Supernova Survey I
• A Detailed View of the Broad Line Region in NGC 3783 from Velocity-Resolved Reverberation Mapping

Cited by in corpus (5)

• Estimating Masses of Supermassive Black Holes in Active Galactic Nuclei from the Halpha Emission Line
• Joint ALMA/X-ray monitoring of the radio-quiet type 1 AGN IC 4329A
• Measuring the Virial Factor in SDSS DR7 AGNs with Redshifted H$\beta$ and H$\alpha$ Broad Emission Lines
• XMM-Newton --NuSTAR monitoring campaign of the Seyfert 1 galaxy IC 4329A
• The COS-Holes Survey: Connecting Galaxy Black Hole Mass with the State of the CGM