SDSS J154751.94+025550 with double-peaked broad Hβbut single-peaked broad Hα: a candidate for central binary black hole system?

Abstract

In this manuscript, an interesting blue Active Galactic Nuclei (AGN) SDSS J154751.94+025550 (=SDSS J1547) is reported with very different line profiles of broad Balmer emission lines: double-peaked broad H$\beta$ but single-peaked broad H$\alpha$. SDSS J1547 is the first AGN with detailed discussions on very different line profiles of the broad Balmer emission lines, besides the simply mentioned different broad lines in the candidate for a binary black hole (BBH) system in SDSS J0159+0105. The very different line profiles of the broad Balmer emission lines can be well explained by different physical conditions to two central BLRs in a central BBH system in SDSS J1547. Furthermore, the long-term light curve from CSS can be well described by a sinusoidal function with a periodicity about 2159days, providing further evidence to support the expected central BBH system in SDSS J1547. Therefore, it is interesting to treat different line profiles of broad Balmer emission lines as intrinsic indicators of central BBH systems in broad line AGN. Under assumptions of BBH systems, 0.125\% of broad line AGN can be expected to have very different line profiles of broad Balmer emission lines. Future study on more broad line AGN with very different line profiles of broad Balmer emission lines could provide further clues on the different line profiles of broad Balmer emission lines as indicator of BBH systems.

arXiv comment10 pages, 8 figures, 1 table, Accepted to be published in MNRAS

References in corpus (51)

• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Composite Quasar Spectra From the Sloan Digital Sky Survey
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• First Results from the Catalina Real-time Transient Survey
• The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Estimating Black Hole Masses in Active Galaxies Using the Halpha Emission Line
• Massive black hole binary mergers within sub-pc scale gas discs
• A possible close supermassive black-hole binary in a quasar with optical periodicity
• A systematic search for close supermassive black hole binaries in the Catalina Real-Time Transient Survey
• The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View
• Double-Peaked Low-Ionization Emission Lines in Active Galactic Nuclei
• What the Optical Recombination Lines Can Tell Us About the Broad Line Regions of Active Galactic Nuclei
• The Lick AGN Monitoring Project: Reverberation Mapping of Optical Hydrogen and Helium Recombination Lines
• Composite Spectra from the FIRST Bright Quasar Survey
• Analysis of optical Fe II emission in a sample of AGN spectra
• The Structure of the Broad Line Region in AGN: I. Reconstructed Velocity-Delay Maps
• What broad emission lines tell us about how active galactic nuclei work
• The Structure of the Broad-Line Region In Active Galactic Nuclei. II. Dynamical Modeling of Data from the AGN10 Reverberation Mapping Campaign
• Evolution of the Nuclear Accretion Disk Emission in NGC 1097: Getting Closer to the Black Hole
• Identifying Supermassive Black Hole Binaries with Broad Emission Line Diagnosis
• Mergers of Unequal Mass Galaxies: Supermassive Black Hole Binary Evolution and Structure of Merger Remnants
• Double-peaked profiles: ubiquitous signatures of disks in the Broad Emission Lines of Active Galactic Nuclei
• Obscured Binary Quasar Cores in SDSS J104807.74+005543.5?
• Velocity-resolved reverberation mapping of five bright Seyfert 1 galaxies
• The shape of broad-line profiles in AGN
• SDSS J0159+0105: A Radio-Quiet Quasar with a Centi-Parsec Supermassive Black Hole Binary Candidate
• Magellan Spectroscopy of Low-Redshift Active Galactic Nuclei
• HI Observations of the Supermassive Binary Black Hole System in 0402+379
• NGC6240: A triple nucleus system in the advanced or final state of merging
• The birth of a supermassive black hole binary
• Testing broad line region models with Reverberation Mapping
• SUPER III. Broad Line Region properties of AGN at z$\sim$2
• A Radial Velocity Test for Supermassive Black Hole Binaries as an Explanation for Broad, Double-Peaked Emission Lines in Active Galactic Nuclei
• Reprocessed emission from warped accretion discs with application to X-ray iron line profiles
• Discovery of a Candidate Binary Supermassive Black Hole in a Periodic Quasar from Circumbinary Accretion Variability
• Interpreting the Variability of Double-Peaked Emission Lines in Active Galactic Nuclei with Stochastically Perturbed Accretion Disk Models
• Two extreme double-peaked line emitters in the Sloan Digital Sky Survey
• Monitoring AGNs with Hβ Asymmetry. II. Reverberation Mapping of Three Seyfert Galaxies Historically Displaying Hβ Profiles with Changing Asymmetry: Mrk 79, NGC 3227, and Mrk 841
• Further evidence to support a tidal disruption event in the changing-look AGN SDSS J0159
• The different origins of high- and low-ionization broad emission lines revealed by gravitational microlensing in the Einstein cross
• Further Evidence for the Accretion Disk Origination of the Double-Peaked Broad H$\alpha$ of 3C390.3
• 3C390.3: More Stable Evidence for Origination of Double-Peaked Broad Balmer Lines from Accretion Disk Near Central Black Hole
• On strong correlation between shifted velocity and line width of broad blue-shifted [OIII] components in quasars
• Correlation between Line Width and Line Flux of Double-Peaked Broad Halpha of 3C390.3
• Are broad optical balmer lines from central accretion disk in PG 1613+658?

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