8 papers
The emergence of X-ray emission lines during relativistic radio-jet formation in the changing-look active galactic nucleus 1ES 1927+654
Dev R. Sadaula, Sibasish Laha, Eileen T. Meyer +27
We present results from a comprehensive multi-wavelength monitoring campaign of the changing-look active galactic nucleus 1ES 1927+654 during the onset and evolution of a relativis…
Modeling Multiple X-Ray Reflection in Super-Eddington Winds
Zijian Zhang, Lars Lund Thomsen, Lixin Dai +7
It has been recently discovered that a few super-Eddington sources undergoing black hole super-Eddington accretion exhibit X-ray reflection signatures. In such new systems, one exp…
Evidence for a shock-compressed magnetic field in the northwestern rim of Vela Jr. from X-ray polarimetry
Dmitry A. Prokhorov, Yi-Jung Yang, Riccardo Ferrazzoli +97
Synchrotron X-ray emission has been detected from nearly a dozen young supernova remnants (SNRs). X-rays of synchrotron origin exhibit linear polarization in a regular, non-randoml…
A View of the Long-Term Spectral Behavior of Ultra Compact X-Ray Binary 4U 0614+091
David L. Moutard, Renee M. Ludlam, Edward M. Cackett +3
In this study, we examine 51 archival NICER observations and 6 archival NuSTAR observations of the neutron star (NS) ultra-compact X-ray binary (UCXB) 4U 0614+091, which span over…
Exploring the high-density reflection model for the soft excess in RBS 1124
A. Madathil-Pottayil, D. J. Walton, Javier GarcÃa +13
'Bare' active galactic nuclei (AGN) are a subclass of Type 1 AGN that show little or no intrinsic absorption. They offer an unobscured view of the central regions of the AGN and th…
Next Generation Accretion Disk Reflection Model: High-Density Plasma Effects
Yuanze Ding, Javier A. GarcÃa, Timothy R. Kallman +5
Luminous accretion disks around black holes are expected to have densities of cm, which are high enough such that plasma physics effects become important.…