Publications (25)
Orbital decay in M82 X-2
Matteo Bachetti, Marianne Heida, Thomas Maccarone +21
M82 X-2 is the first pulsating ultraluminous X-ray source (PULX) discovered. The luminosity of these extreme pulsars, if isotropic, implies an extreme mass transfer rate. An altern…
Long-term X-ray spectral evolution of Ultraluminous X-ray sources: implications on the accretion flow geometry and the nature of the accretor
Andrés Gúrpide, Olivier Godet, Filippos Koliopanos +2
The discovery of pulsations in several Ultraluminous X-ray sources (ULXs) demonstrated that a fraction of ULXs are powered by super-Eddington accretion onto neutron stars (NSs). Th…
Probabilistic classification of X-ray sources applied to Swift-XRT and XMM-Newton catalogs
Hugo Tranin, Olivier Godet, Natalie Webb +1
Context. Serendipitous X-ray surveys have proven to be an efficient way to find rare objects, for example tidal disruption events, changing-look active galactic nuclei (AGN), binar…
Disappearance of the Fe K emission line in Ultra Compact X-ray Binaries 4U 1543-624 and Swift J1756.9-2508
Filippos Koliopanos, Georgios Vasilopoulos, Sebastien Guillot +1
We investigate the long-term variability of the K line of iron in the spectra of two Ultra Compact X-ray Sources (UCXBs) with C/O-rich donors. We revisit archival observations…
The Hot and Energetic Universe: End points of stellar evolution
Christian Motch, Jörn Wilms, Didier Barret +22
White dwarfs, neutron stars and stellar mass black holes are key laboratories to study matter in most extreme conditions of gravity and magnetic field. The unprecedented effective…
Radio Detections During Two State Transitions of the Intermediate Mass Black Hole HLX-1
Natalie Webb, David Cseh, Emil Lenc +7
Relativistic jets are streams of plasma moving at appreciable fractions of the speed of light. They have been observed from stellar mass black holes (320 solar masses, M$_…