A broadband X-ray spectral study of the Seyfert 1 galaxy ESO 141--G055 with XMM-Newton and NuSTAR

Abstract

We have extensively studied the broadband X-ray spectra of the source ESO~141--G055 using all available \xmm{} and \nustar{} observations. We detect a prominent soft excess below 2 keV, a narrow Fe line and a Compton hump (>10 keV). The origin of the soft excess is still debated. We used two models to describe the soft excess: the blurred reflection from the ionized accretion disk and the intrinsic thermal Comptonisation model. We find that both of these models explain the soft excess equally well. We confirm that we do not detect any broad Fe line in the X-ray spectra of this source, although both the physical models prefer a maximally spinning black hole scenario (a$>$0.96). This may mean that either the broad Fe line is absent or blurred beyond detection. The Eddington rate of the source is estimated to be ${\lambda }_{Edd}\sim 0.31$. In the reflection model, the Compton hump has a contribution from both ionized and neutral reflection components. The neutral reflector which simultaneously describes the narrow Fe K$\alpha$ and the Compton hump has a column density of ${\mathrm{N}}_{\mathrm{H}}\ge 7\times 10^{24}\mathrm{c}{\mathrm{m}}^{-2}$. In addition, we detect a partially covering ionized absorption with ionization parameter $\log \xi /\mathrm{ergcm}{\mathrm{s}}^{-1}$ = $0.1_{-0.1}^{+0.1}$ and column density ${\mathrm{N}}_{\mathrm{H}}=20.6_{-1.0}^{+1.0}\times 10^{22}\mathrm{c}{\mathrm{m}}^{-2}$ with a covering factor of $0.21_{-0.01}^{+0.01}$.

10 pages, 4 tables and 4 figures. Accepted in MNRAS

References in corpus (7)

• A deep X-ray view of the bare AGN Ark120. IV. XMM-Newton and NuSTAR spectra dominated by two temperature (warm, hot) Comptonization processes
• Iron K$\alpha$ emission in type-I and type-II Active Galactic Nuclei
• NuSTAR/XMM-Newton monitoring of the Seyfert 1 galaxy HE 1143-1810. Testing the two-corona scenario
• The narrow Fe K$\alpha$ line and the molecular torus in active galactic nuclei - an IR/X-ray view
• Swift/XRT- NuSTAR spectra of type 1 AGN]{Swift/XRT- NuSTAR spectra of type 1 AGN: confirming INTEGRAL results on the high energy cut-off
• NuSTAR spectral analysis of two bright Seyfert 1 galaxies: MCG +8-11-11 and NGC 6814
• Study of X-ray variability and coronae of Seyfert galaxies using NuSTAR

Cited by in corpus (8)

• Optical and mid-infrared line emission in nearby Seyfert galaxies
• Broadband X-Ray Observations of the 2018 Outburst of the Changing-Look Active Galactic Nucleus NGC 1566
• The origin of the soft X-ray excess in the narrow-line Seyfert 1 galaxy SBS 1353+564
• The origin of the vanishing soft X-ray excess in the changing-look Active Galactic Nucleus Mrk 590
• An X-ray spectral study of the origin of reflection features in bare Seyfert 1 galaxy ESO 511--G030
• A weakening Compton hump and soft X-ray excess detected in the Seyfert-1 galaxy MCG-02-58-22
• The Origin of The Soft X-Ray Excess in the Seyfert 1.5 Galaxy ESO 362-G18
• A radio, optical, UV and X-ray view of the enigmatic changing look Active Galactic Nucleus 1ES~1927+654 from its pre- to post-flare states