1.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of BristolGB236 papers
- University of OxfordGB60 papers
- Centre National de la Recherche ScientifiqueFR53 papers
- University of GroningenNL51 papers
- École Polytechnique Fédérale de LausanneCH44 papers
- University of Hawaii SystemUS41 papers
- University of TurinIT41 papers
- Université Paris CitéFR39 papers
- CEA Paris-SaclayFR38 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR38 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di FerraraIT37 papers
- University of CambridgeGB37 papers
21 papers · 1 filter
Decoding Cygnus X-2: The Critical Role of Reflection in IXPE Data
Honghui Liu, Jiachen Jiang, Adam Ingram +10
We present a spectro-polarimetric re-analysis of the first IXPE observation of Cygnus X-2 which we determine to be mainly in the normal branch, from quasi-simultaneous observations…
Gradus.jl: spacetime-agnostic general relativistic ray-tracing for X-ray spectral modelling
Fergus J. E. Baker, Andrew J. Young
We introduce Gradus.jl, an open-source and publicly available general relativistic ray-tracing toolkit for spectral modelling in arbitrary spacetimes. Our software is written in th…
Distinguishing the Origin of Eccentric Black Hole Mergers with Gravitational-wave Spin Measurements
Jakob Stegmann, Davide Gerosa, Isobel Romero-Shaw +3
It remains an open question whether the binary black hole mergers observed with gravitational-wave detectors originate from the evolution of isolated massive binary stars or were d…
Fast and accurate parameter estimation of high-redshift sources with the Einstein Telescope
Filippo Santoliquido, Jacopo Tissino, Ulyana Dupletsa +9
The Einstein Telescope (ET), along with other third-generation gravitational wave (GW) detectors, will be a key instrument for detecting GWs in the coming decades. However, analyzi…
Discovering neutron stars with LISA via measurements of orbital eccentricity in Galactic binaries
Christopher J. Moore, Eliot Finch, Antoine Klein +3
LISA will detect Galactic binaries, the majority being double white dwarfs. However, approximately of these systems will contain neutron…
Coronal height constraint in IRAS 13224-3809 and 1H 0707-495 by the random forest regressor
N. Mankatwit, P. Chainakun, W. Luangtip +1
We develop a random forest regressor (RFR) machine learning model to trace the coronal evolution in two highly variable active galactic nuclei (AGNs) IRAS 13224-3809 and 1H 0707-49…
Revealing the intrinsic X-ray reverberation lags in IRAS 13224-3809 through the Granger causality test
P. Chainakun, N. Nakhonthong, W. Luangtip +1
The Granger causality is an econometric test for determining whether one time series is useful for forecasting another one with a certain Granger lag. Here, the light curves in the…
High-density reflection spectroscopy of black hole X-ray binaries in the hard state
Honghui Liu, Jiachen Jiang, Zuobin Zhang +9
We present a high-density relativistic reflection analysis of 21 spectra of six black hole X-ray binaries in the hard state with data from \textit{NuSTAR} and \textit{Swift}. We fi…
Extended Corona Models of X-ray Reverberation in the AGN 1H~0707-495 and IRAS 13224-3809
S. Hancock, A. J. Young, P. Chainakun
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 Ga…
Variability In A Low-Mass AGN: Oscillation Or Eruption?
Robbie Webbe, A. J. Young
Following the discovery of a new class of X-ray variability seen in four galaxies, dubbed Quasi-Periodic Eruptions (QPEs), we reconsider the variability seen in the low-mass AGN 2X…
Mapping the X-ray corona evolution of IRAS 13224-3809 with the power spectral density
Poemwai Chainakun, Wasuthep Luangtip, Jiachen Jiang +1
We develop the power spectral density (PSD) model to explain the nature of the X-ray variability in IRAS 13224-3809, including the full effects of the X-ray reverberation due to th…
X-ray timing and spectral analysis of reverberating active galactic nuclei
Stephen Hancock, Andy Young, Poemwai Chainakun
We use the publicly available XMM-Newton archive to select a sample of 20 active galactic nuclei (AGN) known to exhibit reverberation signatures caused by the reflection of X-rays…
Predicting the black hole mass and correlations in X-ray reverberating AGN using neural networks
P. Chainakun, I. Fongkaew, S. Hancock +1
We develop neural network models to predict the black hole mass using 22 reverberating AGN samples in the XMM-Newton archive. The model features include the fractional excess varia…
Effects of the refractive index of the X-ray corona on the emission lines in AGN
P. Chainakun, A. Watcharangkool, A. J. Young
X-ray reflection from an accretion disc produces characteristic emission lines allowing us to probe the innermost regions in AGN. We investigate these emission lines under a framew…
Machine learning application to detect light echoes around black holes
P. Chainakun, N. Mankatwit, P. Thongkonsing +1
X-ray reverberation has become a powerful tool to probe the disc-corona geometry near black holes. Here, we develop Machine Learning (ML) models to extract the X-ray reverberation…
Evolution of the truncated disc and inner hot-flow of GX 339-4
P. Chainakun, W. Luangtip, A. J. Young +2
Aims. We study the changes in geometry of the truncated disc and the inner hot-flow of GX 339-4 by analyzing the Power SpectralDensity (PSD) extracted from six XMM-Newton observati…
Disentangling the AGN and Star-Formation Contributions to the Radio-X-ray Emission of Radio-Loud Quasars at 1<z<2
Mojegan Azadi, Belinda Wilkes, Joanna Kuraszkiewicz +12
We constrain the emission mechanisms responsible for the prodigious electromagnetic output generated by active galactic nuclei (AGN) and their host galaxies with a novel state-of-t…
Blueshifted absorption lines from X-ray reflection in IRAS 13224-3809
A. C. Fabian, C. S. Reynolds, J. Jiang +17
We explore a disc origin for the highly-blueshifted, variable absorption lines seen in the X-ray spectrum of the Narrow Line Seyfert 1 galaxy IRAS13224-3809. The blueshift correspo…
Relativistic X-ray jets at high redshift
Daniel A Schwartz, Aneta Siemiginowska, Diana M Worrall +6
Powerful radio sources and quasars emit relativistic jets of plasma and magnetic fields that travel hundreds of kilo-parsecs, ultimately depositing energy into the intra- or inter-…
Investigating the X-ray time-lags in PG 1244+026 using an extended corona model
P. Chainakun, A. J. Young
We present an extended corona model based on ray-tracing simulations to investigate X-ray time lags in Active Galactic Nuclei (AGN). This model consists of two axial point sources…
Simultaneous spectral and reverberation modelling of relativistic reflection in Mrk 335
P. Chainakun, A. J. Young
We present an X-ray spectral and timing model to investigate the broad and variable iron line seen in the high flux state of Mrk 335. The model consists of a variable X-ray source…