State-of-the-art AGN SEDs for Photoionization Models: BLR Predictions Confront the Observations

Ward, M. J.; Landt, H.; Jin, C.; Done, C.; Ferland, G. J.

doi:10.1093/mnras/staa1207

The radio detection and accretion properties of the peculiar nuclear transient AT 2019avd (2023)
Journal Article
Wang, Y., Baldi, R. D., del Palacio, S., Guolo, M., Yang, X., Zhang, Y., …Dai, L. (2023). The radio detection and accretion properties of the peculiar nuclear transient AT 2019avd. Monthly Notices of the Royal Astronomical Society, 520(2), 2417–2435. https://doi.org/10.1093/mnras/stad101

AT 2019avd is a nuclear transient detected from infrared to soft X-rays, though its nature is yet unclear. The source has shown two consecutive flaring episodes in the optical and the infrared bands, and its second flare was covered by X-ray monitori... Read More about The radio detection and accretion properties of the peculiar nuclear transient AT 2019avd.

MAXI J1820+070 X-ray spectral-timing reveals the nature of the accretion flow in black hole binaries (2023)
Journal Article
Kawamura, T., Done, C., Axelsson, M., & Takahashi, T. (2023). MAXI J1820+070 X-ray spectral-timing reveals the nature of the accretion flow in black hole binaries. Monthly Notices of the Royal Astronomical Society, 519(3), 4434-4453. https://doi.org/10.1093/mnras/stad014

Black hole X-ray binaries display significant stochastic variability on short time-scales (0.01–100 s), with a complex pattern of lags in correlated variability seen in different energy bands. This behaviour is generally interpreted in a model where... Read More about MAXI J1820+070 X-ray spectral-timing reveals the nature of the accretion flow in black hole binaries.

The extreme super-eddington NLS1 RX J0134.2-4258 – II. A weak-line Seyfert linking to the weak-line quasar (2022)
Journal Article
Jin, C., Done, C., Ward, M., Panessa, F., Liu, B., & Liu, H. (2023). The extreme super-eddington NLS1 RX J0134.2-4258 – II. A weak-line Seyfert linking to the weak-line quasar. Monthly Notices of the Royal Astronomical Society, 518(4), 6065-6082. https://doi.org/10.1093/mnras/stac3513

QWIND3: UV line-driven accretion disc wind models for AGN feedback (2022)
Journal Article
Quera-Bofarull, A., Done, C., Lacey, C. G., Nomura, M., & Ohsuga, K. (2023). QWIND3: UV line-driven accretion disc wind models for AGN feedback. Monthly Notices of the Royal Astronomical Society, 518(2), 2693-2711. https://doi.org/10.1093/mnras/stac3171

The ultraviolet (UV) bright accretion disc in active galactic nuclei (AGNs) should give rise to line driving, producing a powerful wind that may play an important role in AGN feedback as well as in producing structures like the broad-line region. How... Read More about QWIND3: UV line-driven accretion disc wind models for AGN feedback.

What powers the wind from the black hole accretion disc in GRO J1655-40? (2022)
Journal Article
Tomaru, R., Done, C., & Mao, J. (2022). What powers the wind from the black hole accretion disc in GRO J1655-40?. Monthly Notices of the Royal Astronomical Society, 518(2), 1789-1801. https://doi.org/10.1093/mnras/stac3210

Black hole accretion discs can produce powerful outflowing plasma (disc winds), seen as blue-shifted absorption lines in stellar and supermassive systems. These winds in Quasars have an essential role in controlling galaxy formation across cosmic tim... Read More about What powers the wind from the black hole accretion disc in GRO J1655-40?.

Localized thermonuclear bursts from accreting magnetic white dwarfs (2022)
Journal Article
Scaringi, S., Groot, P., Knigge, C., Bird, A., Breedt, E., Buckley, D., Cavecchi, Y., Degenaar, N., de Martino, D., Done, C., Fratta, M., Iłkiewicz, K., Koerding, E., Lasota, J.-P., Littlefield, C., Manara, C., O’Brien, M., Szkody, P., & Timmes, F. (2022). Localized thermonuclear bursts from accreting magnetic white dwarfs. Nature, 604(7906), 447-450. https://doi.org/10.1038/s41586-022-04495-6

Nova explosions are caused by global thermonuclear runaways triggered in the surface layers of accreting white dwarfs1,2,3. It has been predicted4,5,6 that localized thermonuclear bursts on white dwarfs can also take place, similar to type-I X-ray bu... Read More about Localized thermonuclear bursts from accreting magnetic white dwarfs.

Multiwavelength campaign on the Super-Eddington NLS1 RX J0134.2-4258 – I. Peculiar X-ray spectra and variability (2022)
Journal Article
Jin, C., Done, C., Ward, M., Panessa, F., Liu, B., & Liu, H. (2022). Multiwavelength campaign on the Super-Eddington NLS1 RX J0134.2-4258 – I. Peculiar X-ray spectra and variability. Monthly Notices of the Royal Astronomical Society, 512(4), 5642-5656. https://doi.org/10.1093/mnras/stac827

We have conducted a new long-term multiwavelength campaign on one of the most super-Eddington narrow-line Seyfert 1s (NLS1s) known, namely RX J0134.2-4258. In this first paper, we report deep simultaneous X-ray observations performed by XMM–Newton an... Read More about Multiwavelength campaign on the Super-Eddington NLS1 RX J0134.2-4258 – I. Peculiar X-ray spectra and variability.

Origins of the UV/X-ray relation in Arakelian 120 (2022)
Journal Article
Mahmoud, R. D., Done, C., Porquet, D., & Lobban, A. (2023). Origins of the UV/X-ray relation in Arakelian 120. Monthly Notices of the Royal Astronomical Society, 521(3), 3585-3596. https://doi.org/10.1093/mnras/stac3809

We explore the accretion geometry in Arakelian 120 using intensive UV and X-ray monitoring from Swift. The hard X-rays (1–10 keV) show large amplitude, fast (few-day) variability, so we expect reverberation from the disc to produce UV variability fro... Read More about Origins of the UV/X-ray relation in Arakelian 120.

A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2 (2022)
Journal Article
Sathyaprakash, R., Roberts, T., Grisé, F., Kaaret, P., Ambrosi, E., Done, C., Gladstone, J., Kajava, J., Soria, R., & Zampieri, L. (2022). A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2. Monthly Notices of the Royal Astronomical Society, 511(4), 5346-5362. https://doi.org/10.1093/mnras/stac402

NGC 1313 X-2 is one of the few known pulsating ultraluminous X-ray sources (PULXs), and so is thought to contain a neutron star that accretes at highly super-Eddington rates. However, the physics of this accretion remains to be determined. Here, we r... Read More about A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2.

A full spectral-timing model to map the accretion flow in black hole binaries: the low/hard state of MAXI J1820+070 (2022)
Journal Article
Kawamura, T., Axelsson, M., Done, C., & Takahashi, T. (2022). A full spectral-timing model to map the accretion flow in black hole binaries: the low/hard state of MAXI J1820+070. Monthly Notices of the Royal Astronomical Society, 511(1), 536-552. https://doi.org/10.1093/mnras/stac045

The nature and geometry of the accretion flow in the low/hard state of black hole binaries is currently controversial. While most properties are generally explained in the truncated disc/hot inner flow model, the detection of a broad residual around... Read More about A full spectral-timing model to map the accretion flow in black hole binaries: the low/hard state of MAXI J1820+070.

The Voyage of Metals in the Universe from Cosmological to Planetary Scales: the need for a Very High-Resolution, High Throughput Soft X-ray Spectrometer (2021)
Journal Article
Nicastro, F., Kaastra, J., Argiroffi, C., Behar, E., Bianchi, S., Bocchino, F., Borgani, S., Branduardi-Raymont, G., Bregman, J., Churazov, E., Diaz-Trigo, M., Done, C., Drake, J., Fang, T., Grosso, N., Luminari, A., Mehdipour, M., Paerels, F., Piconcelli, E., Pinto, C., …Zappacosta, L. (2021). The Voyage of Metals in the Universe from Cosmological to Planetary Scales: the need for a Very High-Resolution, High Throughput Soft X-ray Spectrometer. Experimental Astronomy, 51, 1013–1041. https://doi.org/10.1007/s10686-021-09710-2

Metals form an essential part of the Universe at all scales. Without metals we would not exist, and the Universe would look completely different. Metals are primarily produced via nuclear processes in stars, and spread out through winds or explosions... Read More about The Voyage of Metals in the Universe from Cosmological to Planetary Scales: the need for a Very High-Resolution, High Throughput Soft X-ray Spectrometer.

Space Telescope and Optical Reverberation Mapping Project. IX. Velocity–Delay Maps for Broad Emission Lines in NGC 5548 (2021)
Journal Article
Horne, K., Rosa, G. D., Peterson, B., Barth, A., Ely, J., Fausnaugh, M., Kriss, G., Pei, L., Bentz, M., Cackett, E., Edelson, R., Eracleous, M., Goad, M., Grier, C., Kaastra, J., Kochanek, C., Krongold, Y., Mathur, S., Netzer, H., Proga, D., …Zu, Y. (2021). Space Telescope and Optical Reverberation Mapping Project. IX. Velocity–Delay Maps for Broad Emission Lines in NGC 5548. Astrophysical Journal, 907(2), Article 76. https://doi.org/10.3847/1538-4357/abce60

In this contribution, we achieve the primary goal of the active galactic nucleus (AGN) STORM campaign by recovering velocity–delay maps for the prominent broad emission lines (Lyα, C iv, He ii, and Hβ) in the spectrum of NGC 5548. These are the most... Read More about Space Telescope and Optical Reverberation Mapping Project. IX. Velocity–Delay Maps for Broad Emission Lines in NGC 5548.

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.

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