Extended Corona Models of X-ray Reverberation in the AGN 1H~0707-495 and IRAS 13224-3809

Abstract

We fit a new vertically extended corona model to previously measured reverberation time lags observed by \emph{XMM-Newton} in two extremely variable Narrow Line Seyfert 1 Active Galactic Nuclei (AGN), 1H~0707-495 and IRAS~13224-3809, in a variety of similarly observed flux groups and explore the model in all observations over a 16 year period. The model employs two X-ray sources located along the black hole rotational axis at height, $h_1$ and $h_2$ respectively. These sources have their associated photon indices ${\Gamma }_1$ and ${\Gamma }_2$ which respond to fluctuations in the disc with a maximum response duration of $t_{\text{max}}$ and a propagation delay between the response of the two of $t_{\text{shift}}$. We find that for 1H 0707-495, $h_2$ is significantly correlated with ${\Gamma }_1$ and anti-correlated with ionisation $\xi$. Whilst the 1H 0707-495 corona extends upwards, the emission appears softer and the disc is less ionised. We find similarities in IRAS 13224-3809, but significant anti-correlation between ${\Gamma }_2$ and both $t_{\text{max}}$ and $t_{\text{shift}}$. This suggests that when the IRAS 13224-3809 corona becomes softer while extending vertically upwards, the overall corona response occurs faster. This may also suggest that the inner disc also becomes more active. In addition, ${\Gamma }_1$ and ${\Gamma }_2$ are extreme, relatively less variable, but more separate in IRAS 13224-3809 than in 1H 0707-495. This suggests that the IRAS 13224-3809 corona may be more patchy in the sense that it has two more clear distinct spectral zones of ${\Gamma }_1$ and ${\Gamma }_2$ (possibly relating to two distinct zones of coronal temperature) when compared to 1H 0707-495.

15 pages, 9 figures

References in corpus (17)

• X-ray reverberation around accreting black holes
• Discovery of multiple Lorentzian components in the X-ray timing properties of the Narrow Line Seyfert 1 Ark 564
• Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation
• Driving extreme variability: The evolving corona and evidence for jet launching in Markarian 335
• X-ray Variability of the Seyfert 1 Markarian 335: Power Spectrum and Time Lags
• X-ray Coronal Properties of Swift/BAT-Selected Seyfert 1 Active Galactic Nuclei
• Caught in the act: Measuring the changes in the corona that cause the extreme variability of 1H 0707-495
• Investigating the X-ray time-lags in PG 1244+026 using an extended corona model
• Simultaneous spectral and reverberation modelling of relativistic reflection in Mrk 335
• A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data
• The nature of the extreme X-ray variability in the NLS1 1H 0707-495
• Fundamental X-ray Corona Parameters of Swift/BAT AGN
• A unified accretion-ejection paradigm for black hole X-ray binaries. VI. Radiative efficiency and radio-X-ray correlation during four outbursts from GX339-4
• Relationship between X-ray spectral index and X-ray Eddington ratio for Mrk 335 and Ark 564
• Geometry of the X-ray source 1H 0707-495
• X-ray timing and spectral analysis of reverberating active galactic nuclei
• Predicting the black hole mass and correlations in X-ray reverberating AGN using neural networks

Cited by in corpus (2)

• Coronal height constraint in IRAS 13224-3809 and 1H 0707-495 by the random forest regressor
• Extracting the X-ray reverberation response functions from the AGN light curves using an autoencoder