Outputs (356)

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.