Comparing Reflection and Absorption Models for the Soft X-ray Variability in the NLS1 AGN UGC 11763
arXiv:2208.12177 · doi:10.1093/mnras/stac2434
Abstract
We present a spectral analysis of two XMM-Newton observations of the narrow-line Seyfert 1 galaxy UGC 11763. UGC 11763 shows very different soft X-ray spectral shapes in the two observations separated by 12 years. Three spectral models are considered to explain the multi-epoch X-ray variability of UGC 11763, one based on the relativistic disc reflection model, one based on multiple partially-covering absorbers combined with the warm corona model, and a hybrid model. In the first model, the X-ray variability of UGC 11763 is caused by the emission from a compact coronal region with a variable size. The resulting disc reflection component changes accordingly. A warm absorption model with a modest column density is required in this model too. In the partially-covering absorption scenario, the X-ray variability of UGC 11763 is caused by the variable covering factors of two absorbers located within a region of . Moreover, the temperature and strength of the warm corona have to change significantly too to explain the variable underlying soft X-ray emission. Lastly, we investigate the possibility of variable intrinsic power-law emission from the hot corona combined with variable absorption in UGC 11763 without changing the geometry of the corona in the third model. This hybrid model provides a slightly better fit than the partially-covering absorption model with improvements in fitting the iron emission band. Current CCD-resolution data cannot distinguish these spectral models for UGC 11763. Future high-resolution X-ray missions, e.g. Athena and XRISM, will test them by resolving different spectral components.
13 pages, 10 figures, accepted by MNRAS
References in corpus (22)
- The effect of radiation pressure on virial black hole mass estimates and the case of Narrow Line Seyfert 1 galaxies
- The NuSTAR spectrum of Mrk 335: Extreme relativistic effects within 2 gravitational radii of the event horizon?
- Investigating the nature of narrow-line Seyfert 1 galaxies with high-energy spectral complexity
- X-Ray and Optical Microlensing in the Lensed Quasar PG 1115+080
- Radiation spectra of warm and optically thick coronae in AGN
- Optical emission line properties of Narrow Line Seyfert 1s and comparison AGN
- Suzaku observations of Mrk 335: Confronting partial covering and relativistic reflection
- High Density Reflection Spectroscopy I. A case study of GX~339-4
- Iron K and Compton hump reverberation in SWIFT J2127.4+5654 and NGC 1365 revealed by NuSTAR and XMM-Newton
- Probing the geometry and motion of AGN coronae through accretion disc emissivity profiles
- Observations of MCG-5-23-16 with Suzaku, XMM-Newton and NuSTAR: Disk tomography and Compton hump reverberation
- Measuring the Innermost Stable Circular Orbits of Supermassive Black Holes
- NuSTAR/XMM-Newton monitoring of the Seyfert 1 galaxy HE 1143-1810. Testing the two-corona scenario
- Super-Eddington QSO RX J0439.6-5311. II. Multi-wavelength Constraints on the Global Structure of the Accretion Flow
- Suzaku observations of Markarian 335: evidence for a distributed reflector
- A New H I Survey of Active Galaxies
- X-ray and optical variability of Seyfert 1 galaxies as observed with XMM-Newton
- Examining the Physical Conditions of a Warm Corona in Active Galactic Nuclei Accretion Discs
- Eclipsing the X-ray emitting region in the active galaxy NGC 6814
- The X-ray Disk/Wind Degeneracy in AGN
- The Inner Accretion Flow in the Resurgent Seyfert-1.2 AGN Mrk 817
- A Partial Eclipse of the Heart: The Absorbed X-ray Low State in Mrk 1048