144 citations · 966 across the 27 of their papers we have counts for
16 papers · 1 filter
From Inspiral to Expansion: The Wake-Driven Torque on Binary Black Holes in Gaseous Medium
Jixuan Yang, Lile Wang, Xinyu Li +1
Binary black holes (BBHs) in gaseous medium, such as active galactic nucleus (AGN) disks, are important gravitational-wave sources, yet the gas-driven torque that governs their orb…
Electromagnetic Signatures of Supermassive Binary Black Holes: Synchrotron, Self-Lensing Flares, and Jet Precession
Hong-Xuan Jiang, Xinyu Li, Jing-Ze Xia +3
The recent evidence for a nanohertz gravitational wave background from Pulsar Timing Arrays highlights the urgent need to identify electromagnetic counterparts to supermassive bina…
Black Hole Collisions With Thin Accretion Disks: OJ 287 and Small-Mass-Ratio Supermassive Black Hole Binary Candidates
Sean M. Ressler, Luciano Combi, Bart Ripperda +1
OJ 287 is the best-known supermassive black hole binary candidate in the nanohertz gravitational wave band. It exhibits periodic flares every 12 years, likely caused by coll…
Force-free wave interaction in magnetar magnetospheres: Computational modeling in axisymmetry
Jens F. Mahlmann, Miguel Á. Aloy, Xinyu Li
Crustal quakes of highly magnetized neutron stars can disrupt their magnetospheres, triggering energetic phenomena like X-ray and fast radio bursts (FRBs). Understanding plasma wav…
Black Hole-Disk Interactions in Magnetically Arrested Active Galactic Nuclei: General Relativistic Magnetohydrodynamic Simulations Using A Time-Dependent, Binary Metric
Sean M. Ressler, Luciano Combi, Xinyu Li +2
Perturber objects interacting with supermassive black hole accretion disks are often invoked to explain observed quasi-periodic behavior in active galactic nuclei (AGN). We present…
Propagation of a Strong Fast Magnetosonic Wave in the Magnetosphere of a Neutron Star
Alexander Y. Chen, Yajie Yuan, Xinyu Li +1
We study the propagation of a strong, low frequency, linearly polarized fast magnetosonic wave inside the magnetosphere of a neutron star. The relative strength of the wave…
An Intermediate-field Fast Radio Burst Model and the Quasi-periodic Oscillation
Jieshuang Wang, Xinyu Li, Zigao Dai +1
Quasi-periodic oscillation (QPO) signals are discovered in some fast radio bursts (FRBs) such as FRB 20191221A, as well as in the X-ray burst associated with the galactic FRB from…
Fast dissipation of Colliding Alfvén Waves in a Magnetically Dominated Plasma
Xinyu Li, Andrei M. Beloborodov, Lorenzo Sironi
Magnetic energy around compact objects often dominates over plasma rest mass, and its dissipation can power the object luminosity. We describe a dissipation mechanism which works f…
Neutrino Fast Flavor Conversions in Neutron-star Post-Merger Accretion Disks
Xinyu Li, Daniel M. Siegel
A compact accretion disk may be formed in the merger of two neutron stars or of a neutron star and a stellar-mass black hole. Outflows from such accretion disks have been identifie…
Relativistic Alfvén Waves Entering Charge Starvation in the Magnetospheres of Neutron Stars
Alexander Y. Chen, Yajie Yuan, Andrei M. Beloborodov +1
Instabilities in a neutron star can generate Alfvén waves in its magnetosphere. Propagation along the curved magnetic field lines strongly shears the wave, boosting its electric cu…
Simulation of a Compact Object with Outflows Moving Through a Gaseous Background
Xinyu Li, Philip Chang, Yuri Levin +2
A compact object moving relative to surrounding gas accretes material and perturbs the density of gas in its vicinity. In the classical picture of Bondi-Hoyle-Lyttleton accretion,…
Consequences of Energetic Magnetar-Like Outbursts of Nearby Neutron Stars: C Events and the Cosmic Electron Spectrum
F. Y. Wang, Xinyu Li, D. O. Chernyshov +3
Four significant events of rapid C increase have taken place within the past several thousand years. The physical origin of these rapid increases is still a mystery but must…
Dissipation of Alfvén Waves in Relativistic Magnetospheres of Magnetars
Xinyu Li, Jonathan Zrake, Andrei M. Beloborodov
Magnetar flares excite strong Alfvén waves in the magnetosphere of the neutron star. The wave energy can (1) dissipate in the magnetosphere, (2) convert to "fast modes" and possibl…
Magnetar Outbursts from Avalanches of Hall Waves and Crustal Failures
Xinyu Li, Yuri Levin, Andrei M. Beloborodov
We explore the interaction between Hall waves and mechanical failures inside a magnetar crust, using detailed one-dimentional models that consider temperature-sensitive plastic flo…
Magnetar heating
Andrei M. Beloborodov, Xinyu Li
We examine four candidate mechanisms that could explain the high surface temperatures of magnetars. (1) Heat flux from the liquid core heated by ambipolar diffusion. It could susta…
Plastic damping of Alfvén waves in magnetar flares and delayed afterglow emission
Xinyu Li, Andrei M. Beloborodov
Magnetar flares generate Alfvén waves bouncing in the closed magnetosphere with energy up to erg. We show that on a 10-ms timescale the waves are transmitted into th…