Changing look AGN Mrk 590: Broad line region and black hole mass from photometric reverberation mapping

Abstract

We present the results of photometric reverberation mapping observations on the changing look active galactic nucleus Mrk 590 at z = 0.026. The observations were carried out from July to December, 2018 using broad band B, R and narrow band Hα and S II filters. B-band traces the continuum emission from the accretion disk, R-band encompasses both the continuum emission from the accretion disk and the redshifted Hα line from the broad line region (BLR), S II band contains the redshifted Hα emission and the Hα band traces the continuum emission underneath the S II band. All the light curves showed strong variation with a fractional root-mean-square variation of 0.132 (+/-) 0.001 in B-band and 0.321 (+/-) 0.001 in Hα line. From cross-correlation function analysis, we obtained a delayed response of Hα line emission to the optical B-band continuum emission of 21.44(+1.49/-2.11) days in the rest-frame of the source, corresponding to a linear size of the BLR of 0.018 pc. This is consistent with previous estimates using Hβ. By combining the BLR size with the Hα line full width at half maximum of 6478 (+/-) 240 km/s measured from a single-epoch spectrum obtained with the Subaru telescope, we derived a black hole mass of 1.96 (+0.15 / -0.21) X 10^8 Msun.

16 pages, 12 figures, 4 tables, Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS), 5 October 2021

References in corpus (17)

• The AGN Black Hole Mass Database
• The black hole mass - stellar velocity dispersion relation of narrow-line Seyfert 1 galaxies
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• The innermost region of AGN tori: implications from the HST/NICMOS Type 1 point sources and near-IR reverberation
• AGN Type-casting: Mrk 590 No Longer Fits the Role
• UCAC5: New Proper Motions using Gaia DR1
• The characteristic blue spectra of accretion disks in quasars as uncovered in the infrared
• Supermassive black holes with high accretion rates in active galactic nuclei: II. the most luminous standard candles in the Universe
• Intensive disc-reverberation mapping of Fairall 9: 1st year of Swift & LCO monitoring
• On the multi-wavelength variability of Mrk 110: Two components acting at different timescales
• Stellar Photometric Structures of the Host Galaxies of Nearby Type 1 Active Galactic Nuclei
• X-ray flux variability of active galactic nuclei observed using NuSTAR
• MUSE observations of a changing-look AGN I: The re-appearance of the broad emission lines
• Multiple Regression Analysis of the Variable Component in the Near-Infrared Region for Type 1 AGN MCG+08-11-011
• Broad line region and black hole mass of PKS 1510-089 from spectroscopic reverberation mapping
• Dust Reverberation Mapping of Z229-15
• The Sloan Digital Sky Survey Reverberation Mapping Project: UV-Optical Accretion Disk Measurements with Hubble Space Telescope

Cited by in corpus (1)

• Flares in the Changing Look AGN Mrk 590. II: Deep X-ray observations reveal a Comptonizing inner accretion flow