212 citations · 3.4k across the 78 of their papers we have counts for
4 papers · 2 filters
Discovery of a Highly Variable Dipping Ultraluminous X-ray source in M94
Dacheng Lin, Jimmy A. Irwin, Natalie A. Webb +2
We report the discovery of a new ultraluminous X-ray source (ULX) 2XMM J125048.6+410743 within the spiral galaxy M94. The source has been observed by ROSAT, Chandra, and XMM-Newton…
The Megasecond Chandra XVP Observation of NGC 3115: Witnessing the Flow of Hot Gas within the Bondi Radius
Ka-Wah Wong, Jimmy A. Irwin, Roman V. Shcherbakov +3
Observational confirmation of hot accretion model predictions has been hindered by the challenge to resolve spatially the Bondi radii of black holes with X-ray telescopes. Here, we…
A ~3.8 hour Periodicity from an Ultrasoft Active Galactic Nucleus Candidate
Dacheng Lin, Jimmy A. Irwin, Olivier Godet +2
Very few galactic nuclei are found to show significant X-ray quasi-periodic oscillations (QPOs). After carefully modeling the noise continuum, we find that the ~3.8 hr QPO in the u…
Modeling Hot Gas Flow in the Low-Luminosity Active Galactic Nucleus of NGC3115
Roman V. Shcherbakov, Ka-Wah Wong, Jimmy A. Irwin +1
Based on the dynamical black hole (BH) mass estimates, NGC3115 hosts the closest billion solar mass BH. Deep studies of the center revealed a very underluminous active galactic nuc…