7 papers
Non-Equilibrium Thermodynamics of Black-Hole Coronae: QPOs, Turbulence, and Jets
Vanessa López-Barquero, Alejandro Jenkins, Christopher S. Reynolds +1
The variability of X-rays observed from accreting black hole systems, including quasi-periodic oscillations (QPOs), suggests a complex nonlinear dynamics in the corona. Here, we pr…
Constraining black hole spin in PG 1535+547 amidst complex multi-layered absorption
A. Madathil-Pottayil, D. J. Walton, Jiachen Jiang +7
We present a spectroscopic analysis of XMM-Newton and NuSTAR observations of the 'complex' NLS1 PG 1535+547 at redshift . These observations span three epochs: 2002 and 20…
Evidence of mutually exclusive outflow forms from a black hole X-ray binary
Zuobin Zhang, Jiachen Jiang, Francesco Carotenuto +13
Accretion onto black holes often leads to the launch of outflows that significantly influence their surrounding environments. The two primary forms of these outflows are X-ray disk…
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…
A rapid black hole spin or emission from the plunging region?
Andrew Mummery, Jiachen Jiang, Adam Ingram +2
Emission from within the plunging region of black hole accretion flows has recently been detected in two X-ray binary systems. There is, furthermore, a possible discrepancy between…
NuSTAR observations of a varying-flux quasar in the Epoch of Reionization
Lea Marcotulli, Thomas Connor, Eduardo Bañados +13
With enough X-ray flux to be detected in a 160s scan by SRG/eROSITA, the quasar CFHQS J142952+544717 is, by far, the most luminous X-ray source known at . We pres…