Outputs (11)

Estimating the size of X-ray lamppost coronae in active galactic nuclei (2020)
Journal Article
Ursini, F., Dovčiak, M., Zhang, W., Matt, G., Petrucci, P.-O., & Done, C. (2020). Estimating the size of X-ray lamppost coronae in active galactic nuclei. Astronomy & Astrophysics, 644, Article A132. https://doi.org/10.1051/0004-6361/202039158

Aims. We report estimates of the X-ray coronal size of active galactic nuclei in the lamppost geometry. In this commonly adopted scenario, the corona is assumed for simplicity to be a point-like X-ray source located on the axis of the accretion disc.... Read More about Estimating the size of X-ray lamppost coronae in active galactic nuclei.

Re-observing the NLS1 galaxy RE J1034+396 – II. New insights on the soft X-ray excess, QPO, and the analogy with GRS 1915+105 (2020)
Journal Article
Jin, C., Done, C., & Ward, M. (2021). Re-observing the NLS1 galaxy RE J1034+396 – II. New insights on the soft X-ray excess, QPO, and the analogy with GRS 1915+105. Monthly Notices of the Royal Astronomical Society, 500(2), 2475-2495. https://doi.org/10.1093/mnras/staa3386

The active galactic nucleus (AGN) RE J1034+396 displays the most significant X-ray quasi-periodic oscillation (QPO) detected so far. We perform a detailed spectral-timing analysis of our recent simultaneous XMM–Newton, NuSTAR, and Swift observations.... Read More about Re-observing the NLS1 galaxy RE J1034+396 – II. New insights on the soft X-ray excess, QPO, and the analogy with GRS 1915+105.

Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548 (2020)
Journal Article
Williams, P., Pancoast, A., Treu, T., Brewer, B., Peterson, B., Barth, A., Malkan, M., Rosa, G. D., Horne, K., Kriss, G., Arav, N., Bentz, M., Cackett, E., Bontà, E. D., Dehghanian, M., Done, C., Ferland, G., Grier, C., Kaastra, J., Kara, E., …Zu, Y. (2020). Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548. Astrophysical Journal, 902(1), Article 74. https://doi.org/10.3847/1538-4357/abbad7

We present geometric and dynamical modeling of the broad line region (BLR) for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The data set includes photometric and spectroscopic monitoring in the optical and ultravio... Read More about Space Telescope and Optical Reverberation Mapping Project. XII. Broad-line Region Modeling of NGC 5548.

Geometry of the X-ray source 1H 0707–495 (2020)
Journal Article
Szanecki, M., Niedźwiecki, A., Done, C., Klepczarek, Ł., Lubiński, P., & Mizumoto, M. (2020). Geometry of the X-ray source 1H 0707–495. Astronomy & Astrophysics, 641, Article A89. https://doi.org/10.1051/0004-6361/202038303

Aims. We investigate the constraints on the size and location of the X-ray source in 1H 0707–495 determined from the shape of the relativistically smeared reflection from the accretion disc. Methods. We developed a new code to model an extended X-ray... Read More about Geometry of the X-ray source 1H 0707–495.

Looking for the underlying cause of black hole X-ray variability in GRMHD simulations (2020)
Journal Article
White, C., Narayan, R., Kluźniak, W., Fragile, P., Done, C., Mahmoud, R., & Bollimpalli, D. (2020). Looking for the underlying cause of black hole X-ray variability in GRMHD simulations. Monthly Notices of the Royal Astronomical Society, 496(3), 3808-3828. https://doi.org/10.1093/mnras/staa1808

Long-term observations have shown that black hole X-ray binaries exhibit strong, aperiodic variability on time-scales of a few milliseconds to seconds. The observed light curves display various characteristic features like a lognormal distribution of... Read More about Looking for the underlying cause of black hole X-ray variability in GRMHD simulations.

Reobserving the NLS1 galaxy RE J1034+396 – I. The long-term, recurrent X-ray QPO with a high significance (2020)
Journal Article
Ward, M., Done, C., & Jin, C. (2020). Reobserving the NLS1 galaxy RE J1034+396 – I. The long-term, recurrent X-ray QPO with a high significance. Monthly Notices of the Royal Astronomical Society, 495(4), 3538-3550. https://doi.org/10.1093/mnras/staa1356

RE J1034+396 is a narrow-line Seyfert 1 galaxy (NLS1) in which the first significant X-ray quasi-periodic oscillation (QPO) in an active galactic nucleus (AGN) was observed in 2007. We report the detection of this QPO in a recent XMM–Newton observati... Read More about Reobserving the NLS1 galaxy RE J1034+396 – I. The long-term, recurrent X-ray QPO with a high significance.

Thermally-Driven Disc Winds as a Mechanism for X-ray Irradiation Heating in Black Hole X-ray Binaries: The Case Study of GX339−4 (2020)
Journal Article
Clavel, M., Done, C., Marcel, G., Dubus, G., & Tetarenko, B. (2020). Thermally-Driven Disc Winds as a Mechanism for X-ray Irradiation Heating in Black Hole X-ray Binaries: The Case Study of GX339−4. Monthly Notices of the Royal Astronomical Society, 495(4), 3666-3682. https://doi.org/10.1093/mnras/staa1367

X-ray irradiation heating of accretion discs in black hole X-ray binaries (BHXBs) plays a key role in regulating their outburst cycles. However, despite decades of theoretical and observational efforts, the physical mechanism(s) responsible for irrad... Read More about Thermally-Driven Disc Winds as a Mechanism for X-ray Irradiation Heating in Black Hole X-ray Binaries: The Case Study of GX339−4.

State-of-the-art AGN SEDs for Photoionization Models: BLR Predictions Confront the Observations (2020)
Journal Article
Ward, M. J., Landt, H., Jin, C., Done, C., & Ferland, G. J. (2020). State-of-the-art AGN SEDs for Photoionization Models: BLR Predictions Confront the Observations. Monthly Notices of the Royal Astronomical Society, 494(4), 5917-5922. https://doi.org/10.1093/mnras/staa1207

The great power offered by photoionization models of Active Galactic Nuclei (AGN) emission line regions has long been mitigated by the fact that very little is known about the spectral energy distribution (SED) between the Lyman limit, where interven... Read More about State-of-the-art AGN SEDs for Photoionization Models: BLR Predictions Confront the Observations.

Qwind code release. A non-hydrodynamical approach to modelling line-driven winds in active galactic nuclei (2020)
Journal Article
Elvis, M., Risaliti, G., McDowell, J. C., Lacey, C., Done, C., & Quera-Bofarull, A. (2020). Qwind code release. A non-hydrodynamical approach to modelling line-driven winds in active galactic nuclei. Monthly Notices of the Royal Astronomical Society, 495(1), 402-412. https://doi.org/10.1093/mnras/staa1117

UV line driven winds may be an important part of the AGN feedback process, but understanding their impact is hindered by the complex nature of the radiation hydrodynamics. Instead, we have taken the approach pioneered by Risaliti & Elvis, calculating... Read More about Qwind code release. A non-hydrodynamical approach to modelling line-driven winds in active galactic nuclei.

Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow (2020)
Journal Article
Done, C., Ohsuga, K., & Nomura, M. (2020). Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow. Monthly Notices of the Royal Astronomical Society, 494(3), 3616-3626. https://doi.org/10.1093/mnras/staa948

Based on recent X-ray observations, ultra-fast outflows from supermassive black holes are expected to have enough energy to dramatically affect their host galaxy but their launch and acceleration mechanisms are not well understood. We perform two-dim... Read More about Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow.