A Highly Accreting Low-Mass Black Hole Hidden in the Dust: Suzaku and NuSTAR observations of the NLS1 Mrk 1239

Abstract

We present torus modelling for the X-ray spectra of a nearby narrow-line Seyfert 1 galaxy Mrk 1239 ($z=0.0199$), based on archival Suzaku, NuSTAR and Swift observations. Our model suggests very soft intrinsic power-law continuum emission of $\Gamma \approx 2.57$ in 2019 and $\Gamma \approx 2.98$ in 2007. By applying a correction factor to the unabsorbed X-ray luminosity, we find that Mrk 1239 is accreting near or around the Eddington limit. Our best-fit spectral model also suggests a torus with a column density of $\log (N_{\mathrm{H},\mathrm{ave}}/$cm${}^{-2})=25.0\pm 0.2$ and a high covering factor of $0.90$ in Mrk 1239, indicating that this source is most likely to be viewed almost face-on with $i\approx 26^{\circ }$. Our line of sight might cross the edge of the torus with $N_{\mathrm{H},\mathrm{los}}=2-5\times 10^{23}$cm${}^{-2}$. The high Eddington ratio and the high line-of-sight column density makes Mrk 1239 one of the AGNs that are close to the limit where wind may form near the edge of the torus due to high radiation pressure.

11 pages, 8 figures (accepted by MNRAS)

References in corpus (15)

• AGN Dusty Tori: I. Handling of Clumpy Media
• BAT AGN Spectroscopic Survey - V. X-ray properties of the Swift/BAT 70-month AGN catalog
• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• The close environments of accreting massive black holes are shaped by radiative feedback
• A 0.8-2.4 microns spectral atlas of Active Galactic Nuclei
• Radiation pressure and absorption in AGN: results from a complete unbiased sample from Swift
• Iron K and Compton hump reverberation in SWIFT J2127.4+5654 and NGC 1365 revealed by NuSTAR and XMM-Newton
• The Central Engines of Narrow-Line Seyfert 1 Galaxies
• The variable and non-variable X-ray absorbers in Compton-thin type-II Active Galactic Nuclei
• A direct comparison of X-ray spectral models for tori in active galactic nuclei
• A Fanaroff-Riley Type I Candidate in Narrow-Line Seyfert 1 Galaxy Mrk 1239
• An X-ray variable absorber within the Broad Line Region in Fairall 51
• Uncovering the primary X-ray emission and possible starburst component in the polarized NLS1 Mrk 1239
• Combined Analysis of X-Ray Spectra of NGC 3227
• The Broadband X-ray Spectrum of the X-ray Obscured Type 1 AGN 2MASX J193013.80+341049.5

Cited by in corpus (2)

• The Collisional and Photoionized Plasma in the Polarized NLS1 galaxy Mrk 1239
• Broad-band spectral analysis of LMXB 2S 0921-63 with Suzaku