18 citations · 44 across the 10 of their papers we have counts for
10 papers
Is there a retrograde accretion disk around 4U 162667? Tracking torque reversals with a state-space model
Joseph O'Leary, Andrew Melatos, Tom Kimpson +5
X-ray timing studies of the persistent, Galactic, accretion-powered pulsar 4U 162667 reveal torque reversals, during which the pulse frequency alternates between multiyea…
Observing Rayleigh-Taylor stable and unstable accretion through a Kalman filter analysis of X-ray pulsars in the Small Magellanic Cloud
Joseph O'Leary, Andrew Melatos, Tom Kimpson +5
Global, three-dimensional, magnetohydrodynamic simulations of Rayleigh-Taylor instabilities at the disk-magnetosphere boundary of rotating, magnetized, compact stellar objects reve…
XMM-Newton high-resolution spectroscopy of EXO 0748-676 after its re-emergence from a long quiescence
Sayantan Bhattacharya, Sudip Bhattacharyya, Gargi Shaw
EXO 0748-676 is a well-studied, high-inclination, dipping, and eclipsing neutron star low-mass X-ray binary that has recently emerged from 16 years of quiescence into a new outburs…
Measuring the magnetic dipole moment and magnetospheric fluctuations of accretion-powered pulsars in the Small Magellanic Cloud with an unscented Kalman filter
Joseph O'Leary, Andrew Melatos, Tom Kimpson +5
Many accretion-powered pulsars rotate in magnetocentrifugal disequilibrium, spinning up or down secularly over multi-year intervals. The magnetic dipole moment of such systems…
Measuring the magnetic dipole moment and magnetospheric fluctuations of SXP 18.3 with a Kalman filter
J. O'Leary, A. Melatos, N. J. O'Neill +4
The magnetic dipole moment of an accretion-powered pulsar in magnetocentrifugal equilibrium cannot be inferred uniquely from time-averaged pulse period and aperiodic X-ray flux…
The First TESS Self-Lensing Pulses: Revisiting KIC 12254688
Nicholas M. Sorabella, Silas G. T. Laycock, Dimitris M. Christodoulou +1
We report the observations of two self-lensing pulses from KIC 12254688 in Transiting Exoplanet Survey Satellite (TESS) light curves. This system, containing a F2V star and white-d…
Accreting Black Holes Skewing and Bending the Optical Emission from Massive Wolf-Rayet Companions -- A Case Study of IC10 X-1
Sayantan Bhattacharya, Dimitris M. Christodoulou, Andre-Nicolas Chene +3
We present a statistical analysis of the He ii 4686 emission line in the spectra of the black hole and Wolf-Rayet (WR) star of the high-mass X-ray binary IC10 X-1. This line is vis…
Probing the Stellar Wind of the Wolf-Rayet Star in IC 10 X-1
Sayantan Bhattacharya, Silas G. T. Laycock, Andre-Nicolas Chene +5
IC 10 X-1 is an eclipsing high mass X-ray binary (HMXB) containing a stellar-mass black hole (BH) and a Wolf-Rayet (WR) donor star with an orbital period of P = 34.9 hr. This binar…
Disentangling the neighbouring pulsars SXP 15.3 and SXP 305
Itumeleng M. Monageng, Malcolm J. Coe, Lee J. Townsend +8
SXP 15.3 and SXP 305 are two Be X-ray binaries in the Small Magellanic Cloud that are spatially separated by ~7 arcsec. The small separation between these sources has, in the past,…
The Wolf-Rayet + Black Hole Binary NGC 300 X-1: What is the Mass of the Black Hole?
Breanna A. Binder, Janelle M. Sy, Michael Eracleous +6
We present new X-ray and UV observations of the Wolf-Rayet + black hole binary system NGC 300 X-1 with the Chandra X-ray Observatory and the Hubble Space Telescope Cosmic Origins S…