2011ApJ...741...66R -
Astrophys. J., 741, 66 (2011/November-1)
Reverberation mapping of the intermediate-mass nuclear black hole in SDSS J114008.71+030711.4.
RAFTER S.E., KASPI S., BEHAR E., KOLLATSCHNY W. and ZETZL M.
Abstract (from CDS):
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 (MBH< 106 M{x2609}) found by Greene & Ho in the Sloan Digital Sky Survey. 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 (τ) 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 τ to be two days with an upper limit of six days. We estimate the AGN luminosity at 5100 Å to be λL5100~ 1.1x1043 erg/s after deconvolution from the host galaxy. The most well-calibrated RBLR-L relation predicts a time lag that is four times larger than what we measure. Using the measured Hβ full width at half-maximum of 703±110 km/s and an upper limit for RBLR=6 light days, we find MBH ≲ 5.8x105 M{x2609} 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 MBH< 106 M{x2609} determined using RM.
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Journal keyword(s):
galaxies: active - galaxies: evolution - galaxies: fundamental parameters - galaxies: individual: SDSS J114008.71+030711.4 - galaxies: Seyfert
Simbad objects:
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