Reverberation Mapping of the Intermediate Mass Nuclear Black Hole in SDSS J114008.71+030711.4

Abstract

We present the results of a reverberation mapping (RM) campaign on the black hole (BH) associated with the active galactic nucleus (AGN) in SDSS J114008.71+030711.4 (hereafter GH08). This object is selected from a sample of 19 candidate intermediate mass BHs (M_{BH} < 10^{6} Msun) found by Greene & Ho 2004 in the Sloan Digital Sky Survey (SDSS). We used the Hobby-Eberly Telescope to obtain 30 spectra over a period of 178 days in an attempt to resolve the reverberation time lag (tau) between the continuum source and the broad line region (BLR) in order to determine the radius of the BLR (R_{BLR}) in GH08. We measure tau to be 2 days with an upper limit of 6 days. We estimate the AGN luminosity at 5100 Angstroms to be approximately 1.1 x 10^{43} erg s^{-1} after deconvolution from the host galaxy. The most well calibrated R_{BLR}-L relation predicts a time lag which is 4 times larger than what we measure. Using the measured Hβ full-width-at-half-maximum of 703 (+/-) 110 km s^{-1} and an upper limit for R_{BLR} = 6 light days, we find M_{BH} < 5.8 x 10^{5} Msun as an upper limit to the BH virial mass in GH08, which implies super-Eddington accretion. Based on our measured M_{BH} we propose that GH08 may be another candidate to add to the very short list of AGNs with M_{BH} < 10^{6} Msun determined using RM.

Accepted for publication in ApJ, 21 pages, 5 figures, 3 tables

References in corpus (8)

• The Host Galaxies and Classification of Active Galactic Nuclei
• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies
• Supermassive black holes do not correlate with galaxy disks or pseudobulges
• Black Holes in Pseudobulges and Spheroidals: A Change in the Black Hole-Bulge Scaling Relations at Low Mass
• Narrow-line Seyfert 1 Galaxies and the M_BH - sigma Relation
• X-ray Properties of Intermediate-mass Black Holes in Active Galaxies
• Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. III. Optical Variability and X-ray/UV/Optical Correlations

Cited by in corpus (21)

• Intermediate-Mass Black Holes
• Dwarf Galaxies with Optical Signatures of Active Massive Black Holes
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• The Sloan Digital Sky Survey Reverberation Mapping Project: Technical Overview
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX 10 New Observations of Reverberation Mapping and Shortened H$\beta$ Lags
• The Radius-Luminosity Relationship Depends on Optical Spectra in Active Galactic Nuclei
• The Sloan Digital Sky Survey Reverberation Mapping Project: First Broad-line Hbeta and MgII Lags at z>~0.3 from six-Month Spectroscopy
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. VI. Velocity-resolved Reverberation Mapping of H$\beta$ Line
• Monitoring AGNs with Hβ Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping
• X-ray Properties of Intermediate-mass Black Holes in Active Galaxies. III. Spectral Energy Distribution and Possible Evidence for Intrinsically X-ray-weak AGNs
• On the Observational Difference Between the Accretion Disk-Corona Connections among Super- and Sub-Eddington Accreting Active Galactic Nuclei
• Simulations of the OzDES AGN Reverberation Mapping Project
• Broad Band Photometric Reverberation Mapping of NGC 4395
• Low-Mass AGN and Their Relation to the Fundamental Plane of Black Hole Accretion
• Monitoring AGNs with H$\beta$ Asymmetry. III. Long-term Reverberation Mapping Results of 15 Palomar-Green Quasars
• The Best Constraints on A Super-Eddington Accretion Flow: XMM-Newton Observations of An Intermediate-mass Black Hole
• Probing the Active Massive Black Hole Candidate in the Center of NGC 404 with VLBI
• The Sloan Digital Sky Survey Reverberation Mapping Project: Composite Lags at $z\lesssim 1$
• Reverberation Mapping with Intermediate-Band Photometry: Detection of Broad-Line H$\alpha$ Time Lags for Quasars at $0.2<z<0.4$
• Reverberation Mapping of PG 0934+013 with the Southern African Large Telescope
• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. II. Loosely Wound Cases: Reverberation Properties