143 citations · 353 across the 13 of their papers we have counts for
13 papers
Quantitative comparisons of VHE gamma-ray blazar flares with relativistic reconnection models
J. Jormanainen, T. Hovatta, I. M. Christie +3
The origin of extremely fast variability is one of the long-standing questions in the gamma-ray astronomy of blazars. While many models explain the slower, lower energy variability…
Striped Jets in Post Neutron Star Merger Systems
Emma Kaufman, I. M. Christie, A. Lalakos +2
Models invoking magnetic reconnection as the particle acceleration mechanism within relativistic jets often adopt a gradual energy dissipation profile within the jet. However, such…
Bridging Bondi and Event Horizon Scales: 3D GRMHD Simulations Reveal X-Shaped Radio Galaxy Morphology
Aretaios Lalakos, Ore Gottlieb, Nick Kaaz +6
X-shaped radio galaxies (XRGs) produce misaligned X-shaped jet pairs and make up of radio galaxies. XRGs are thought to emerge in galaxies featuring a binary superma…
Confronting observations of VHE gamma-ray blazar flares with reconnection models
J. Jormanainen, T. Hovatta, E. Lindfors +3
Several models have been suggested to explain the fast gamma-ray variability observed in blazars, but its origin is still debated. One scenario is magnetic reconnection, a process…
The observability of plasmoid-powered -ray flares with the Fermi Large Area Telescope
Manuel Meyer, Maria Petropoulou, Ian Christie
The exact mechanism for the production of fast -ray variability in blazars remains debated. Magnetic reconnection, in which plasmoids filled with relativistic particles and magn…
Inverse Compton Signatures of Gamma-Ray Burst Afterglows
Hao Zhang, Ian Christie, Maria Petropoulou +2
The afterglow emission from gamma-ray bursts (GRBs) is believed to originate from a relativistic blast wave driven into the circumburst medium. Although the afterglow emission from…
Inter-Plasmoid Compton Scattering and the Compton Dominance of BL Lacs
I. M. Christie, M. Petropoulou, L. Sironi +1
Blazar emission models based on magnetic reconnection succeed in reproducing many observed spectral and temporal features, including the short-duration luminous flaring events. Pla…
The Role of Magnetic Field Geometry in the Evolution of Neutron Star Merger Accretion Discs
I. M. Christie, A. Lalakos, A. Tchekhovskoy +4
Neutron star mergers are unique laboratories of accretion, ejection, and r-process nucleosynthesis. We used 3D general relativistic magnetohydrodynamic simulations to study the rol…
Radiative Signatures of Plasmoid-Dominated Reconnection in Blazar Jets
I. M. Christie, M. Petropoulou, L. Sironi +1
The multi-wavelength spectral and temporal variability observed in blazars set tight constraints on current theoretical emission models. Here, we investigate the relativistic magne…
X-ray mapping of the stellar wind in the binary PSR J2032+4127/MT91 213
M. Petropoulou, G. Vasilopoulos, I. M. Christie +2
PSR J2032+4127 is a young and rapidly rotating pulsar on a highly eccentric orbit around the high-mass Be star MT91 213. X-ray monitoring of the binary system over a 4000 day…
Plasmoid statistics in relativistic magnetic reconnection
M. Petropoulou, I. M. Christie, L. Sironi +1
Plasmoids, quasi-spherical regions of plasma containing magnetic fields and high-energy particles, are a self-consistent by-product of the reconnection process in the relativistic…
Radio Emission from Sgr A*: Pulsar Transits Through the Accretion Disc
Ian Christie, Maria Petropoulou, Petar Mimica +1
Radiatively inefficient accretion flow models have been shown to accurately account for the spectrum and luminosity observed from Sgr A* in the X-ray regime down to mm wavelengths.…
Modelling Accretion Disk and Stellar Wind Interactions: the Case of Sgr A*
I. M. Christie, M. Petropoulou, P. Mimica +1
Sgr A* is an ideal target to study low-luminosity accreting systems. It has been recently proposed that properties of the accretion flow around Sgr A* can be probed through its int…