All Outputs (357)

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.

The thermal-radiative wind in low-mass X-ray binary H1743−322 – II. Iron line predictions from Monte Carlo radiation transfer (2020)
Journal Article
Takahashi, T., Odaka, H., Ohsuga, K., Done, C., & Tomaru, R. (2020). The thermal-radiative wind in low-mass X-ray binary H1743−322 – II. Iron line predictions from Monte Carlo radiation transfer. Monthly Notices of the Royal Astronomical Society, 494(3), 3413-3421. https://doi.org/10.1093/mnras/staa961

We show the best current simulations of the absorption and emission features predicted from thermal-radiative winds produced from X-ray illumination of the outer accretion disc in binary systems. We use the density and velocity structure derived from... Read More about The thermal-radiative wind in low-mass X-ray binary H1743−322 – II. Iron line predictions from Monte Carlo radiation transfer.

The impact of thermal winds on the outburst lightcurves of black hole X-ray binaries (2019)
Journal Article
Dubus, G., Done, C., Tetarenko, B. E., & Hameury, J.-M. (2019). The impact of thermal winds on the outburst lightcurves of black hole X-ray binaries. Astronomy & Astrophysics, 632, Article A40. https://doi.org/10.1051/0004-6361/201936333

Context. The observed signatures of winds from X-ray binaries are broadly consistent with thermal winds, which are driven by X-ray irradiation of the outer accretion disc. Thermal winds produce mass outflow rates that can exceed the accretion rate in... Read More about The impact of thermal winds on the outburst lightcurves of black hole X-ray binaries.

Discarding the disc in a changing-state AGN: the UV/X-ray relation in NGC 4151 (2019)
Journal Article
Mahmoud, R. D., & Done, C. (2020). Discarding the disc in a changing-state AGN: the UV/X-ray relation in NGC 4151. Monthly Notices of the Royal Astronomical Society, 491(4), 5126-5139. https://doi.org/10.1093/mnras/stz3196

Recent monitoring campaigns designed to map the accretion regime in AGN show major discrepancies with models where the optical/ultraviolet (UV) is produced by X-ray-illuminated, optically thick disc material within a few hundred gravitational radii.... Read More about Discarding the disc in a changing-state AGN: the UV/X-ray relation in NGC 4151.

Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743$-$322 (2019)
Journal Article
Shidatsu, M., & Done, C. (2019). Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743$-$322. Astrophysical Journal, 885(2), Article 112. https://doi.org/10.3847/1538-4357/ab46b3

High inclination black hole X-ray binaries exhibit blueshifted ionized absorption lines from disk winds, whose launching mechanism is still in debate. The lines are predominantly observed in the high/soft state and disappear in the low/hard state, an... Read More about Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743$-$322.

The thermal-radiative wind in low mass X-ray binary H~1743-322; Radiation hydrodynamic simulations (2019)
Journal Article
Tomaru, R., Done, C., Ohsuga, K., Nomura, M., & Takahashi, T. (2019). The thermal-radiative wind in low mass X-ray binary H~1743-322; Radiation hydrodynamic simulations. Monthly Notices of the Royal Astronomical Society, 490(3), 3098-3111. https://doi.org/10.1093/mnras/stz2738

Blueshifted absorption lines are seen in high inclination black hole binary systems in their disc dominated states, showing these power an equatorial disc wind. While some contribution from magnetic winds remain a possibility, thermal and thermal-rad... Read More about The thermal-radiative wind in low mass X-ray binary H~1743-322; Radiation hydrodynamic simulations.

Modelling the spectral energy distribution of super-Eddington quasars (2019)
Journal Article
Kubota, A., & Done, C. (2019). Modelling the spectral energy distribution of super-Eddington quasars. Monthly Notices of the Royal Astronomical Society, 489(1), 524-533. https://doi.org/10.1093/mnras/stz2140

We develop a broadband spectral model, AGNSLIM, to describe super-Eddington black hole accretion disc spectra. This is based on the slim disc emissivity, where radial advection keeps the surface luminosity at the local Eddington limit, resulting in L... Read More about Modelling the spectral energy distribution of super-Eddington quasars.

The relativistic jet of the γ-ray emitting narrow-line Seyfert 1 galaxy PKS J1222+0413 (2019)
Journal Article
Kynoch, D., Landt, H., Ward, M. J., Done, C., Boisson, C., Baloković, M., Angelakis, E., & Myserlis, I. (2019). The relativistic jet of the γ-ray emitting narrow-line Seyfert 1 galaxy PKS J1222+0413. Monthly Notices of the Royal Astronomical Society, 487(1), 181-197. https://doi.org/10.1093/mnras/stz1193

We present a multi-frequency study of PKS J1222+0413 (4C +04.42), currently the highest redshift γ-ray emitting narrow-line Seyfert 1 (γ-NLS1). We assemble a broad spectral energy distribution (SED) including previously unpublished datasets: X-ray da... Read More about The relativistic jet of the γ-ray emitting narrow-line Seyfert 1 galaxy PKS J1222+0413.

CLOUDY view of the warm corona (2019)
Journal Article
Panda, S., Czerny, B., Done, C., & Kubota, A. (2019). CLOUDY view of the warm corona. Astrophysical Journal, 875(2), Article 133. https://doi.org/10.3847/1538-4357/ab11cb

Bright active galaxies show a range of properties, but many of these properties are correlated, which has led to the concept of the quasar main sequence. We test whether our current understanding of the quasar structure allows the pattern observed in... Read More about CLOUDY view of the warm corona.

Reverberation Reveals the Truncated Disc in the Hard State of GX 339-4 (2019)
Journal Article
Mahmoud, R. D., Done, C., & De Marco, B. (2019). Reverberation Reveals the Truncated Disc in the Hard State of GX 339-4. Monthly Notices of the Royal Astronomical Society, 486(2), 2137-2152. https://doi.org/10.1093/mnras/stz933

The nature and geometry of the hard state in black hole binaries is controversial. The broadband continuum spectrum and fast variability properties can be explained in a model where the inner disc evaporates into a geometrically thick, hot flow. Howe... Read More about Reverberation Reveals the Truncated Disc in the Hard State of GX 339-4.

A deep X-ray view of the bare AGN Ark 120. V. Spin determination from disc-Comptonisation efficiency method (2019)
Journal Article
Porquet, D., Done, C., Reeves, J., Grosso, N., Marinucci, A., Matt, G., Lobban, A., Nardini, E., Braito, V., Marin, F., Kubota, A., Ricci, C., Koss, M., Stern, D., Ballantyne, D., & Farrah, D. (2019). A deep X-ray view of the bare AGN Ark 120. V. Spin determination from disc-Comptonisation efficiency method. Astronomy & Astrophysics, 623, Article A11. https://doi.org/10.1051/0004-6361/201834448

Context. The spin of supermassive black holes (SMBH) in active galactic nuclei (AGN) can be determined from spectral signature(s) of relativistic reflection such as the X-ray iron Kα line profile, but this can be rather uncertain when the line of sig... Read More about A deep X-ray view of the bare AGN Ark 120. V. Spin determination from disc-Comptonisation efficiency method.

Rapid Black Hole Growth at the Dawn of the Universe: Super-Eddington Quasar at z=6.6 (2019)
Journal Article
Tang, J., Goto, T., Ohyama, Y., Jin, C., Done, C., Lu, T., …Kim, S. J. (2019). Rapid Black Hole Growth at the Dawn of the Universe: Super-Eddington Quasar at z=6.6. Monthly Notices of the Royal Astronomical Society, 484(2), 2575-2586. https://doi.org/10.1093/mnras/stz134

We present the analysis of a new near-infrared (NIR) spectrum of a recently discovered z = 6.621 quasar PSO J006 + 39 in an attempt to explore the early growth of supermassive black holes (SMBHs). This NIR (rest-frame ultraviolet, UV) spectrum shows... Read More about Rapid Black Hole Growth at the Dawn of the Universe: Super-Eddington Quasar at z=6.6.

The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey (2019)
Journal Article
Edelson, R., Gelbord, J., Cackett, E., Peterson, B., Horne, K., Barth, A., Starkey, D., Bentz, M., Brandt, W., Goad, M., Joner, M., Korista, K., Netzer, H., Page, K., Uttley, P., Vaughan, S., Breeveld, A., Cenko, S., Done, C., Evans, P., …Villforth, C. (2019). The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey. Astrophysical Journal, 870(2), Article 123. https://doi.org/10.3847/1538-4357/aaf3b4

Swift intensive accretion disk reverberation mapping of four AGN yielded light curves sampled ~200–350 times in 0.3–10 keV X-ray and six UV/optical bands. Uniform reduction and cross-correlation analysis of these data sets yields three main results:... Read More about The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey.

Thermally driven wind as the origin of warm absorbers in AGN (2019)
Journal Article
Mizumoto, M., Done, C., Tomaru, R., & Edwards, I. (2019). Thermally driven wind as the origin of warm absorbers in AGN. Monthly Notices of the Royal Astronomical Society, 489(1), 1152-1160. https://doi.org/10.1093/mnras/stz2225

Warm absorbers are present in many Active Galactic Nuclei (AGN), seen as mildly ionised gas outflowing with velocities of a few hundred to a few thousand kilometres per second. These slow velocities imply a large launch radius, pointing to the broad... Read More about Thermally driven wind as the origin of warm absorbers in AGN.

Evolution of thermally driven disk wind in the black hole binary 4U 1630-47 observed with Suzaku and Nustar (2018)
Journal Article
Hori, T., Ueda, Y., Done, C., Shidatsu, M., & Kubota, A. (2018). Evolution of thermally driven disk wind in the black hole binary 4U 1630-47 observed with Suzaku and Nustar. Astrophysical Journal, 869(2), Article 183. https://doi.org/10.3847/1538-4357/aaea5e

We performed simultaneous observations with Suzaku and NuSTAR of the Galactic black hole binary 4U 1630−47 in the high/soft state (HSS) during the 2015 outburst. To compare our results with those observed in the HSS at lower luminosities, we re-analy... Read More about Evolution of thermally driven disk wind in the black hole binary 4U 1630-47 observed with Suzaku and Nustar.

X-ray reverberation lags of the Fe–K line due to AGN disc winds (2018)
Journal Article
Mizumoto, M., Ebisawa, K., Tsujimoto, M., Done, C., Hagino, K., & Odaka, H. (2019). X-ray reverberation lags of the Fe–K line due to AGN disc winds. Monthly Notices of the Royal Astronomical Society, 482(4), 5316-5326. https://doi.org/10.1093/mnras/sty3056

Short X-ray reverberation lags are seen across a broad Fe–K energy band in more than 20 active galactic nuclei (AGNs). This broad iron line feature in the lag spectrum is most significant in super-Eddington sources such as Ark 564 (L/LEdd ∼ 1) and 1H... Read More about X-ray reverberation lags of the Fe–K line due to AGN disc winds.

Evolution of X-ray irradiation during the 1999–2000 outburst of the black hole binary XTE J1859 + 226 (2018)
Journal Article
Kimura, M., & Done, C. (2019). Evolution of X-ray irradiation during the 1999–2000 outburst of the black hole binary XTE J1859 + 226. Monthly Notices of the Royal Astronomical Society, 482(1), 626-638. https://doi.org/10.1093/mnras/sty2736

X-ray irradiation in X-ray binaries is thought to control the behaviour at the outer disc, which is observable mainly at optical wavelengths. It is generally parametrized phenomenologically, but it can also be predicted from theoretical models of irr... Read More about Evolution of X-ray irradiation during the 1999–2000 outburst of the black hole binary XTE J1859 + 226.

A physical model for the spectral-timing properties of accreting black holes (2018)
Journal Article
Mahmoud, R. D., & Done, C. (2018). A physical model for the spectral-timing properties of accreting black holes. Monthly Notices of the Royal Astronomical Society, 480(3), 4040-4059. https://doi.org/10.1093/mnras/sty2133

We develop new techniques to deconvolve the radial structure of the X-ray emission region in the bright low/hard state of the black hole Cygnus X-1 using both spectral and timing data in the 3–35 keV range. The spectrum at these energies is dominated... Read More about A physical model for the spectral-timing properties of accreting black holes.

X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor (2018)
Journal Article
McHardy, I., Connolly, S., Horne, K., Cackett, E., Gelbord, J., Peterson, B., Pahari, M., Gehrels, N., Goad, M., Lira, P., Arevalo, P., Baldi, R., Brandt, N., Breedt, E., Chand, H., Dewangan, G., Done, C., Elvis, M., Emmanoulopoulos, D., Fausnaugh, M., …Ward, M. (2018). X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor. Monthly Notices of the Royal Astronomical Society, 480(3), 2881-2897. https://doi.org/10.1093/mnras/sty1983

We report the results of intensive X-ray, UV, and optical monitoring of the Seyfert 1 galaxy NGC 4593 with Swift. There is no intrinsic flux-related spectral change in any variable component with small apparent variations being due to contamination b... Read More about X-ray/UV/optical variability of NGC 4593 with Swift: reprocessing of X-rays by an extended reprocessor.