Panchromatic Properties of the Extreme FeII Emitter PHL 1092

Abstract

We present near-infrared spectroscopy of the NLS1 galaxy PHL1092 (z=0.394), the strongest FeII emitter ever reported, combined with optical and UV data. We modeled the continuum and the broad emission lines using a power-law plus a black body function and Lorentzian functions, respectively. The strength of the FeII emission was estimated using the latest FeII templates in the literature. We re-estimate the ratio between the FeII complex centered at 4570Ang and the broad component of H-Beta, R_FeII, obtaining a value of 2.58, nearly half of that previously reported (R_FeII=6.2), but still placing PHL1092 among extreme FeII emitters. The FWHM found for low ionization lines are very similar (FWHM~1200km/s), but significantly narrower than those of the Hydrogen lines (FWHM(H-Beta)~1900km/s). Our results suggest that the FeII emission in PHL1092 follows the same trend as in normal FeII emitters, with FeII being formed in the outer portion of the BLR and co-spatial with CaII, and OI, while H-Beta is formed closer to the central source. The flux ratio between the UV lines suggest high densities, log(n_H)~13.0 cm^{-3}, and a low ionization parameter, log(U)~-3.5. The flux excess found in the FeII bump at 9200Ang after the subtraction of the NIR FeII template and its comparison with optical FeII emission suggests that the above physical conditions optimize the efficiency of the ly-Alpha fluorescence process, which was found to be the main excitation mechanism in the FeII production. We discuss the role of PHL1092 in the Eigenvector 1 context.

arXiv commentAccepted for publication at MNRAS

References in corpus (57)

• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• A Catalog of Quasar Properties from SDSS DR7
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• Astrophysics Source Code Library
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
• The diversity of quasars unified by accretion and orientation
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• Eigenvector 1: An Optimal Correlation Space for Active Galactic Nuclei
• The unusual emission line spectrum of IZw1
• CIV 1549 as an Eigenvector 1 Parameter for Active Galactic Nuclei
• Fe II Emission in 14 Low-Redshift Quasars: I - Observations
• Analysis of optical Fe II emission in a sample of AGN spectra
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX 10 New Observations of Reverberation Mapping and Shortened H$\beta$ Lags
• A 0.8-2.4 microns spectral atlas of Active Galactic Nuclei
• Searching for the Physical Drivers of the Eigenvector 1 Correlation Space
• Cosmic Evolution of Mass Accretion Rate and Metalicity in Active Galactic Nuclei
• Blueshifted [O III] Emission: Indications of a Dynamic NLR
• A Catalog of Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey Data Release 12
• The Lick AGN Monitoring Project 2011: Fe II Reverberation from the Outer Broad-Line Region
• A Systematic Analysis of Fe II Emission in Quasars: Evidence for Inflow to the Central Black Hole
• Average Quasar Spectra in the Context of Eigenvector 1
• The effect of radiation pressure on emission line profiles and black hole mass determination in active galactic nuclei
• HST STIS Ultraviolet Spectral Evidence for Outflow in Extreme Narrow-line Seyfert 1 Galaxies: I. Data and Analysis
• Kinematic Linkage Between the Broad and Narrow Line Emitting Gas in AGN
• The Near-Infrared Broad Emission Line Region of Active Galactic Nuclei -- I. The Observations
• CIV Emission Line Properties and Systematic Trends in Quasar Black Hole Mass Estimates
• Predicted FeII Emission-Line Strengths from Active Galactic Nuclei
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. VI. Velocity-resolved Reverberation Mapping of H$\beta$ Line
• Super-Eddington accreting massive black holes as long-lived cosmological standards
• A spectroscopic analysis of a sample of narrow-line Seyfert 1 galaxies selected from the Sloan Digital Sky Survey
• Highly Accreting Quasars: Sample Definition and Possible Cosmological Implications
• Modelling of the quasar main sequence in the optical plane
• BLR Physical Conditions in Extreme Population A Quasars: a Method to Estimate Central Black Hole Mass at High Redshift
• Black hole masses from power density spectra: determinations and consequences
• The Nuclear Near-Infrared Spectral Properties of Nearby Galaxies
• The Demise of the Classical BLR in the Luminous Quasar PG1416-129
• Highly accreting quasars: The SDSS low-redshift catalog
• Lyman Alpha Fluorescent Excitation of FeII in Active Galactic Nuclei
• NLS1 galaxies and estimation of their central black hole masses from the X-ray excess variance method
• Observations of OI and CaII Emission Lines in Quasars: Implications for the Site of FeII Line Emission
• Infrared FeII Emission in Narrow-Line Seyfert 1 Galaxies
• Insights on the X-ray weak quasar phenomenon from XMM-Newton monitoring of PHL 1092
• Low-Ionization Emission Regions in Quasars: Gas Properties Probed with Broad O I and Ca II Lines
• Nuclear/Circumnuclear Starbursts and Active Galactic Nuclei Mass Accretion in Seyfert Galaxies
• OI and CaII observations in intermediate redshift quasars
• Extreme quasars at high redshift
• H-beta Line Width and the UV-X-ray Spectra of Luminous AGN
• Implications from the optical to UV flux ratio of FeII emission in quasars
• PHL 1092 as a transient extreme X-ray weak quasar
• A Near-Infrared Template Derived from I Zw 1 for the FeII Emission in Active Galaxies
• Discovery of Resolved Debris Disk Around HD 131835
• The Prevalence of Narrow Optical Fe II Emission Lines in Type 1 Active Galactic Nuclei
• Circumnuclear star formation in Mrk 42 mapped with Gemini Near-infrared Integral Field Spectrograph
• The properties of active galaxies at the extreme of eigenvector 1
• Metal enrichment by radiation pressure in active galactic nucleus outflows -- theory and observations
• XMM observations of the narrow-line QSO PHL 1092: Detection of a high and variable soft component

Cited by in corpus (14)

• The CaFe Project: Optical Fe II and Near-Infrared Ca II triplet emission in active galaxies -- simulated EWs, the co-dependence of cloud sizes and metal content
• The CaFe Project: Optical Fe II and Near-Infrared Ca II triplet emission in active galaxies: (I) Photoionization modelling
• High Metal Content of Highly Accreting Quasars: Analysis of an Extended Sample
• The transient event in NGC 1566 from 2017 to 2019 -- I. An eccentric accretion disk and a turbulent, disk-dominated broad-line region unveiled by double-peaked Ca II and O I lines
• The Extreme Super-Eddington NLS1 RX J0134.2-4258 -- II. A Weak-Line Seyfert Linking to the Weak-Line Quasar
• Chemical abundances along the quasar main sequence
• Fantastic Fits with fantasy of Active Galactic Nuclei Spectra -- Exploring the Fe II emission near the H$\alpha$ line
• The intermediate-ionization lines as virial broadening estimators for Population A quasars
• First observation of double-peaked O I emission in the near-infrared spectrum of an active galaxy
• Linear Spectropolarimetric Analysis of Fairall 9 with VLT/FORS2
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• H$\beta$ line shape and radius-luminosity relation in 2.5D FRADO
• The CaFe Project: Optical FeII and Near-Infrared Ca II triplet emission in active galaxies. II. The driver(s) of the Ca II and Fe II and its potential use as a chemical clock
• Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei