234 citations · 1.1k across the 36 of their papers we have counts for
39 papers
Spinning Between Models: Continuum and Reflection Constraints in the Intermediate States of GRS 1716-249 and GRS 1739-278
Tiffany Tausch, Paul A. Draghis, Erin Kara +7
Measurements of stellar-mass black hole spin probe accretion under strong gravity and constrain black hole formation and evolution. Intermediate states, in which thermal disk, coro…
XRISM Spectroscopy of Variable Accretion-driven Disk Winds in NGC 4151: When, Where, and How Fast Outflows are Launched
Xin Xiang, Jon Miller, Missagh Mehdipour +12
X-ray observations probe the inner accretion flow within active galactic nuclei, revealing the highest gas column densities and fastest winds. The most diverse winds yet revealed w…
Reverberation in the Narrow Fe K Line in the Seyfert Galaxy NGC 4151 with XRISM
Jon M. Miller, Aberahmen Zoghbi, Xin Xiang +11
Emission lines that "echo" variations in the ionizing flux produced close to black holes are powerful probes of the central engine. In the Seyfert-1.5 galaxy NGC 4151, high-resolut…
Energy dependence of the X-ray power spectrum in NGC4051 and NGC4395
V. A. Diamantopoulos, I. E. Papadakis, A. Akylas +3
Active galactic nuclei (AGNs) exhibit strong variability across the electromagnetic spectrum on a wide range of timescales, particularly in X-rays where fluctuations are both rapid…
XRISM Spectroscopy of the Stellar-mass Black Hole GRS 1915+105
Jon M. Miller, Liyi Gu, John Raymond +11
GRS 1915105 was the stellar-mass black hole that best reproduced key phenomena that are also observed in Type-1 active galactic nuclei. In recent years, however, it has evolved…
XRISM/Resolve Spectroscopy of the Central Engine in the Seyfert-1 AGN Mrk 279
Jon M. Miller, Xin Xiang, Doyee Byun +9
High-resolution X-ray spectroscopy with XRISM gives an unprecedented view of the ``central engine'' in active galactic nuclei, providing unique insights into black hole accretion a…
XRISM Spectroscopy of Accretion-Driven Wind Feedback in NGC 4151
Xin Xiang, Jon M. Miller, Ehud Behar +17
The hottest, most ionized, and fastest winds driven by accretion onto massive black holes have the potential to reshape their host galaxies. Calorimeter-resolution X-ray spectrosco…
The population of NuSTAR Black Hole X-ray Binaries
Paul A. Draghis, Jon M. Miller, Laura Brenneman +5
The spin of a black hole (BH) encodes information about its formation and evolution history. Yet the understanding of the distribution of BH spins in X-ray binaries (XBs), of the m…
Superluminal proper motion in the X-ray jet of Centaurus A
David Bogensberger, Jon M. Miller, Richard Mushotzky +4
The structure of the jet in Cen A is likely better revealed in X-rays than in the radio band, which is usually used to investigate jet proper motions. In this paper, we analyze Cha…
Investigating the Mass of the Black Hole and Possible Wind Outflow of the Accretion Disk in the Tidal Disruption Event AT2021ehb
Xin Xiang, Jon M. Miller, Abderahmen Zoghbi +11
Tidal disruption events (TDEs) can potentially probe low-mass black holes in host galaxies that might not adhere to bulge or stellar-dispersion relationships. At least initially, T…
Test for Echo: X-ray Reflection Variability in the Seyfert-2 AGN NGC 4388
B. Gediman, J. M. Miller, A. Zoghbi +4
We report on a study of the narrow Fe K line and reflection spectrum in the well-known Seyfert-2 AGN, NGC 4388. X-ray spectra summed from two extensive NICER monitoring campaign…
Detection of Asymmetry in the Narrow Fe K Emission Line in MCG-5-23-16 with Chandra
Victor Liu, Abderahmen Zoghbi, Jon M. Miller
Iron K (Fe K) emission is observed ubiquitously in AGN, and it is a powerful probe of their circumnuclear environment. Examinations of the emission line play a pivotal role i…
Fierce Feedback in an Obscured, Sub-Eddington State of the Seyfert 1.2 Markarian 817
Miranda K. Zak, Jon M. Miller, Ehud Behar +7
Markarian 817 is a bright and variable Seyfert-1.2 active galactic nucleus (AGN). X-ray monitoring of Mrk 817 with the Neil Gehrels Swift Observatory in 2022 revealed that the sour…
Evidence for a dynamic corona in the short-term time lags of black hole X-ray binary MAXI J1820+070
Niek Bollemeijer, Phil Uttley, Arkadip Basak +19
In X-ray observations of hard state black hole X-ray binaries, rapid variations in accretion disc and coronal power-law emission are correlated and show Fourier-frequency-dependent…
NuSTAR Hard X-ray Monitoring of Gravitationally Lensed Quasar RX J1131-1231
Cora A. DeFrancesco, Xinyu Dai, Mark Mitchell +2
The X-ray emission from active galactic nuclei (AGN) is believed to come from a combination of inverse Compton scattering of photons from the accretion disk and reprocessing of the…
Redshifted iron emission and absorption lines in the Chandra X-ray spectrum of Centaurus A
David Bogensberger, Jon Miller, Elias Kammoun +9
Cen A hosts the closest active galactic nucleus to the Milky Way, which makes it an ideal target for investigating the dynamical processes in the vicinity of accreting supermassive…
Systematically Revisiting All NuSTAR Spins of Black Holes in X-Ray Binaries
Paul A. Draghis, Jon M. Miller, Elisa Costantini +4
We extend our recent work on black hole spin in X-ray binary systems to include an analysis of 189 archival NuSTAR observations from 24 sources. Using self-consistent data reductio…
Measuring The Soft Excess Region Size Relative to the Corona in AGN With NICER
A. Zoghbi, J. M. Miller
The soft excess is a significant emission component in the Soft (<1 keV) X-ray spectra of many AGN. It has been explained by disk reflection, a warm corona and other models. Unders…
Evidence of a Massive Stellar Disruption in the X-ray Spectrum of ASASSN-14li
J. M. Miller, B. Mockler, E. Ramirez-Ruiz +7
The proximity and duration of the tidal disruption event (TDE) ASASSN-14li led to the discovery of narrow, blue-shifted absorption lines in X-rays and UV. The gas seen in X-ray abs…
An Extreme Black Hole in the Recurrent X-ray Transient XTE J2012+381
Paul A. Draghis, Jon M. Miller, McKinley C. Brumback +3
The black hole candidate XTE J2012+381 underwent an outburst at the end of 2022. We analyzed 105 NICER observations and 2 NuSTAR observations of the source during the outburst. The…
Negative Lags on the Viscous Timescale in Quasar Photometry and Prospects for Detecting More with LSST
Amy Secunda, Jenny E. Greene, Yan-Fei Jiang +2
The variability of quasar light curves can be used to study the structure of quasar accretion disks. For example, continuum reverberation mapping uses delays between variability in…
A hard look at the X-ray spectral variability of NGC 7582
Mehdy Lefkir, Elias Kammoun, Didier Barret +5
NGC 7582 (z = 0.005264; D = 22.5 Mpc) is a highly variable, changing-look AGN. In this work, we explore the X-ray properties of this source using XMM-Newton and NuSTAR archival obs…
The Black Hole Candidate Swift J1728.93613 and the Supernova Remnant G351.90.9
Mayura Balakrishnan, Paul A. Draghis, Jon M. Miller +12
A number of neutron stars have been observed within the remnants of the core-collapse supernova explosions that created them. In contrast, black holes are not yet clearly associate…
AGN STORM 2. III. A NICER view of the variable X-ray obscurer in Mrk 817
Ethan R. Partington, Edward M. Cackett, Erin Kara +44
The AGN STORM 2 collaboration targeted the Seyfert 1 galaxy Mrk 817 for a year-long multiwavelength, coordinated reverberation mapping campaign including HST, Swift, XMM-Newton, NI…