Chandra Observations of the X-ray Narrow-Line Region in NGC 4151

Abstract

We present the first high-resolution X-ray spectrum of the Seyfert 1.5 galaxy NGC 4151. Observations with the Chandra High Energy Transmission Grating Spectrometer reveal a spectrum dominated by narrow emission lines from a spatially resolved (1.6 kpc), highly ionized nebula. The X-ray narrow-line region is composite, consisting of both photoionized and collisionally ionized components. The X-ray emission lines have similar velocities, widths, and spatial extent to the optical emission lines, showing that they arise in the same region. The clouds in the narrow-line region must contain a large range of ionization states in order to explain both the optical and X-ray photoionized emission. Chandra data give the first direct evidence of X-ray line emission from a hot plasma (T~1e7 K) which may provide pressure confinement for the cooler (T=3e4 K) photoionized clouds.

13 pages, 3 figures, to be published in Astrophysical Journal Letters

References in corpus (4)

• X-ray photoionized plasma diagnostics with Helium-like ions. Application to Warm Absorber-Emitter in Active Galactic Nuclei
• A Kinematic Model for the Narrow-Line Region in NGC 4151
• Recombination spectra of Helium-Like Ions
• The Physical Conditions of the X-ray Emission Line Regions in the Circinus Galaxy

Cited by in corpus (88)

• Revisiting the Unified Model of Active Galactic Nuclei
• An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
• Line ratios for Helium-like ions: Applications to collision-dominated plasmas
• X-ray Spectral Survey with XMM--Newton of a Complete Sample of Nearby Seyfert Galaxies
• The Compact, Conical, Accretion-Disk Warm Absorber of the Seyfert 1 Galaxy NGC 4051 and its Implications for IGM-Galaxy Feedback Processes
• Revealing the Dusty Warm Absorber in MCG--6-30-15 with the Chandra HETG
• Evidence for a multizone warm absorber in the XMM-Newton spectrum of Markarian 304
• The Cores of the Fe K$\alpha$ Lines in Active Galactic Nuclei: an Extended Chandra High Energy Grating Sample
• Relativistic iron K X-ray Reverberation in NGC 4151
• Testing Comptonization models using BeppoSAX observations of Seyfert 1 galaxies
• An X-ray Baldwin effect for the narrow Fe K-alpha lines observed in Active Galactic Nuclei
• Rapid N_H changes in NGC 4151
• Penetrating the Deep Cover of Compton Thick Active Galactic Nuclei
• A Runaway Black Hole in COSMOS: Gravitational Wave or Slingshot Recoil?
• Testing the Seyfert Unification Theory: Chandra HETGS Observations of NGC 1068
• Simultaneous Ultraviolet and X-ray Observations of the Seyfert Galaxy NGC 4151. I. Physical Conditions in the X-ray Absorbers
• The Soft X-ray Spectrum from NGC 1068 Observed with LETGS on Chandra
• The X-ray nebula around the Seyfert 2 galaxy NGC4388
• A Deep Chandra ACIS Study of NGC 4151. III. the Line Emission and Spectral Analysis of the Ionization Cone
• A Deep Chandra ACIS Study of NGC 4151. II. The Innermost Emission Line Region and Strong Evidence for Radio Jet-NLR Cloud Collision
• STIS Echelle Observations of the Seyfert Galaxy NGC 4151: Physical Conditions in the Ultraviolet Absorbers
• The Kinematics and Physical Conditions of the Ionized Gas in Markarian 509. I. Chandra High-Energy Grating Spectroscopy
• Accretion and nuclear activity of quiescent supermassive black holes. I: X-ray study
• Relativistic O VIII Emission and Ionized Outflow in NGC 4051
• Dynamics of the Narrow-Line Region in the Seyfert 2 Galaxy NGC 1068
• Imaging the Circumnuclear Region of NGC 1365 with Chandra
• Revisiting The Spectral and Timing Properties of NGC 4151
• Extreme flux states of NGC 4151 observed with INTEGRAL
• Characterising the complex absorber in NGC 4151
• X-ray spectral variability of the Seyfert galaxy NGC 4051
• A Deep Chandra ACIS Study of NGC 4151. I. the X-ray Morphology of the 3 kpc-diameter Circum-nuclear Region and Relation to the Cold Interstellar Medium
• Chandra X-ray Observation of NGC 4151
• Magnetic fields in AGNs and microquasars
• Demystifying the coronal line region of active galactic nuclei: spatially resolved spectroscopy with HST
• Radio jets in NGC 4151: where eMERLIN meets HST
• Jet-ISM Interaction in the Radio Galaxy 3C293: Jet-driven Shocks Heat ISM to Power X-ray and Molecular H2 emission
• Iron K features in the hard X-ray XMM-Newton spectrum of NGC 4151
• A Suzaku, NuSTAR, and XMM-Newton view on variable absorption and relativistic reflection in NGC 4151
• The Size-Luminosity Relationship of Quasar Narrow-Line Regions
• The Connection between the Narrow-Line Region and the UV Absorbers in Seyfert Galaxies
• Deep Chandra Observations of ESO 428-G014: II. Spectral Properties and Morphology of the Large-Scale Extended X-ray Emission
• Mkn 1239: A highly polarized NLS1 with a steep X-ray spectrum and strong NeIX emission
• Suzaku View of the Swift/BAT Active Galactic Nuclei (I): Spectral Analysis of Six AGNs and Evidence for Two Types of Obscured Population
• NGC 4151: an intrinsically average Seyfert 1
• The XMM-Newton/HST view of the obscuring outflow in the Seyfert Galaxy Mrk 335 observed at extremely low X-ray flux
• Extended X-ray Emission in the HI Cavity of NGC 4151: Galaxy-scale AGN Feedback?
• Variability of accretion flow in the core of the Seyfert galaxy NGC 4151
• An XMM-Newton view of the `bare' nucleus of Fairall 9
• The Kinematics and Physical Conditions pf the Ionized Gas in Markarian 509. II. STIS Echelle Observations
• Spectral Survey of X-Ray Bright Active Galactic Nuclei from the Rossi X-ray Timing Explorer
• The complex soft X-ray spectrum of NGC 4151
• A Photoionization Model For The Soft X-Ray Spectrum Of NGC 4151
• The broad band spectrum and variability of NGC 4151 observed by BeppoSAX
• The High Energy Spectrum of NGC 4151
• A deep Chandra look at the low L_B elliptical NGC821: X-ray binaries, a galactic wind and emission at the nucleus
• A deep Chandra, VLA and Spitzer IRAC study of the very low luminosity nucleus of the elliptical NGC821
• Probing the Complex and Variable X-ray Absorption of Markarian 6 with XMM-Newton
• The Highest Resolution Chandra View of Photoionization and Jet-Cloud Interaction in the Nuclear Region of NGC 4151
• Supersolar metal abundances and the Broad Line Region of Narrow-line Seyfert 1 galaxies
• Mass Outflow of the X-ray Emission Line Gas in NGC 4151
• New Insights in the Spectral Variability and Physical Conditions of the X-ray Absorbers in NGC 4151
• Signatures of highly inclined accretion disks in Galactic Black Hole Candidates and AGNs
• Multi-wavelength Probes of Obscuration Towards the Narrow Line Region in Seyfert Galaxies
• Physical Conditions in the X-ray Emission-line Gas in NGC 1068
• A comparison between the soft X-ray and [O III] morphologies of active galactic nuclei
• Revisit Short Term X-ray Spectral Variability of NGC 4151 with Chandra
• The Remarkably Featureless High Resolution X-ray Spectrum of Mrk 478
• Extranuclear X-ray Emission in the Edge-on Seyfert Galaxy NGC 2992
• The soft X-ray and narrow-line emission of Mrk573 on kiloparcec scales
• Unified Electronic Recombination Of Ne-like Fe XVII: Implications for Modeling X-Ray Plasmas
• Different Types of Fe K_αLines from Radiating Annuli near Black Holes
• An accretion disc origin for the `X-ray broad line region' in 1H0707-495
• A 12-day ASCA Observation of the Narrow-Line Seyfert 1 Galaxy Ton S180: Time-Selected Spectroscopy
• The messy environment of Mrk 6
• The signature of high velocity gas in the spectra of NGC 4151
• Spectral Variation of the Seyfert 1 Galaxy MCG-6-30-15 observed with Suzaku
• The Chandra/HETG view of NGC 1365 in a Compton-thick state
• The iron $K_{\alpha }$ lines as a tool for magnetic field estimations in non-flat accretion flows
• Origin of the "Disk-Line" Feature in the X-Ray Energy Spectrum of a Seyfert Galaxy, NGC4151
• NIR imaging spectroscopy of the inner few arcseconds of NGC 4151 with OSIRIS at Keck
• Active Galactic Nuclei at the Crossroads of Astrophysics
• Line and Continuum Variability in Active Galaxies
• On the X-ray low- and high-velocity outflows in AGNs
• Canonical X-Ray Fluorescence Line Intensities as Column Density Indicators
• Probing the Extent of Fe K$\alpha$ Emission in Nearby Active Galactic Nuclei using Multi-Order Analysis of Chandra High Energy Transmission Grating Data
• The XMM-SSC survey of hard-spectrum XMM-Newton sources 1: optically bright sources
• The Detection of Circumnuclear X-ray Emission from the Seyfert Galaxy NGC 3516
• Matter Outflows from AGN: A Unifying Model