The Ultra-Fast Outflow of WKK 4438: Suzaku and NuSTAR X-ray Spectral Analysis

Abstract

Previous X-ray spectral analysis has revealed an increasing number of AGNs with high accretion rates where an outflow with a mildly relativistic velocity originates from the inner accretion disk. Here we report the detection of a new ultra-fast outflow (UFO) with a velocity of $v_{\mathrm{out}}=0.319_{-0.008}^{+0.005}c$ in addition to a relativistic disk reflection component in a poorly studied NLS1 WKK~4438, based on archival \nustar and \suzaku observations. The spectra of both \suzaku and \nustar observations show an Fe~\textsc{xxvi} absorption feature and the \suzaku data also show evidence for an Ar~\textsc{xviii} with the same blueshift. A super-solar argon abundance ($Z_{\mathrm{Ar}}^{\prime }>6Z_{\odot }$) and a slight iron over-abundance ($Z_{\mathrm{Fe}}^{\prime }=2.6_{-2.0}^{+1.9}{Z}_{\odot }$) are found in our spectral modelling. Based on Monte-Carlo simulations, the detection of the UFO is estimated to be around at 3$\sigma$ significance. The fast wind most likely arises from a radius of $\ge 20r_g$ away from the central black hole. The disk is accreting at a high Eddington ratio ($L_{\mathrm{bol}}=0.4-0.7L_{\mathrm{Edd}}$). The mass outflow rate of the UFO is comparable with the disk mass inflow rate (${\dot{M}}_{\mathrm{out}}>30\%{\dot{M}}_{\mathrm{in}}$), assuming a maximum covering factor. The kinetic power of the wind might not be high enough to have influence in AGN feedback (${\dot{E}}_{\mathrm{wind}}/L_{\mathrm{bol}}\approx 3-5\%$) due to a relatively small column density ($12_{-4}^{+9}\times 10^{22}$~cm${}^{-2}$). However note that both the inferred velocity and the column density could be lower limits owing to the low viewing angle ($i=23_{-2}^{+3}$${}^{\circ }$).

arXiv comment7 pages, 3 figures, accepted by MNRAS

References in corpus (41)

• On the Absorption of X-rays in the Interstellar Medium
• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Calibration of X-ray absorption in our Galaxy
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Evidence for ultra-fast outflows in radio-quiet AGNs: I - detection and statistical incidence of Fe K-shell absorption lines
• An X-ray spectral study of 24 type-1 AGN
• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• A high velocity ionised outflow and XUV photosphere in the narrow emission line quasar PG1211+143
• Wind from the black-hole accretion disk driving a molecular outflow in an active galaxy
• ASCA Observations of Seyfert 1 galaxies: III. The Evidence for Absorption & Emission due to Photoionized Gas
• Chandra Detects Relativistic Broad Absorption Lines from APM 08279+5255
• Black hole feedback in the luminous quasar PDS 456
• Resolved atomic lines reveal outflows in two ultraluminous X-ray sources
• XMM-NEWTON Reveals the Quasar Outflow in PG 1115+080
• A soft X-ray study of Type I AGN observed with Chandra HETGS
• A Compton-thick Wind in the High Luminosity Quasar, PDS 456
• Warm absorbers in X-rays (WAX), a comprehensive high resolution grating spectral study of a sample of Seyfert galaxies: I. A global view and frequency of occurrence of warm absorbers
• Ultra-fast outflows in radio-loud active galactic nuclei
• The response of relativistic outflowing gas to the inner accretion disk of a black hole
• Spectral Analysis of 1H0707-495 with XMM-Newton
• The 1.5 Ms Observing Campaign on IRAS 13224-3809: X-ray Spectral Analysis I
• Magnetically-Driven Accretion-Disk Winds and Ultra-Fast Outflows in PG1211+143
• Evidence for a radiatively driven disc-wind in PDS 456?
• An Iron K Component to the Ultrafast Outflow in NGC 1313 X-1
• Ultrafast outflows disappear in high radiation fields
• X-ray absorption lines suggest matter infalling onto the central black-hole of Mrk 509
• X-ray evidence for a mildly relativistic and variable outflow in the luminous Seyfert 1 galaxy Mrk509
• First high energy observations of Narrow Line Seyfert 1s with INTEGRAL/IBIS
• Relativistic blue- and red-shifted absorption lines in AGNs
• Searching for Outflows in Ultraluminous X-ray Sources Through High-Resolution X-ray Spectroscopy
• Revealing the ultra-fast outflow in IRAS 13224-3809 through spectral variability
• A blurred reflection interpretation for the intermediate flux state in Mrk 335
• Short term X-ray spectral variability of the quasar PDS 456 observed in a low flux state
• A new relativistic component of the accretion disk wind in PDS 456
• NuSTAR Reveals Relativistic Reflection But No Ultra-Fast Outflow In The Quasar PG 1211+143
• The variable, fast soft X-ray wind in PG 1211+143
• How the effects of resonant absorption on black hole reflection spectra can mimic high-velocity outflows
• NuSTAR view of the black hole wind in the galaxy merger IRAS F11119$+$3257
• Accretion disk winds in active galactic nuclei: X-ray observations, models, and feedback
• X-ray Lags in PDS 456 Revealed by Suzaku Observations

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