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31 papers · 1 filter
Effective Hamiltonian of topologically protected qubit in a helical crystal
R. A. Niyazov, D. N. Aristov, V. Yu. Kachorovskii
We study a superlattice formed by tunnel-coupled identical antidots periodically situated in a two-dimensional topological insulator placed in a magnetic field. The superlattice sp…
Minutes-duration Optical Flares with Supernova Luminosities
Anna Y. Q. Ho, Daniel A. Perley, Ping Chen +74
In recent years, certain luminous extragalactic optical transients have been observed to last only a few days. Their short observed duration implies a different powering mechanism…
Nature of 4FGL J1838.2+3223: a flaring `spider' pulsar candidate
D. A. Zyuzin, A. Yu. Kirichenko, A. V. Karpova +4
An unidentified -ray source 4FGL J1838.2+3223 has been proposed as a pulsar candidate. We present optical time-series multi-band photometry of its likely optical companion obtai…
The black widow pulsar J1641+8049 in the optical, radio and X-rays
A. Yu. Kirichenko, S. V. Zharikov, A. V. Karpova +14
PSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and -rays. We performed new phase-resolved multi-band photometry of PSR J1641+804…
Pre-impulsive and Impulsive Phases of the Sub-Terahertz Flare of March 28, 2022
G. G. Motorina, Yu. T. Tsap, V. V. Smirnova +3
Properties of the solar radio spectrum, as well as the temporal profiles of flare emission, indicate the thermal nature of the sub-terahertz (sub-THz) component observed as the gro…
Core-collapse supernova inside the core of a young massive star cluster: 3D MHD simulations
D. V. Badmaev, A. M. Bykov, M. E. Kalyashova
Young massive stars in compact stellar clusters could end their evolution as core-collapse supernovae a few million years after the cluster was built. The blast wave of a supernova…