Zobrazeno 1 - 10
of 326
pro vyhledávání: '"Panin, A. G."'
We have shown that the wave scattering by a soliton occurs in a peculiar way. The nonlinear interaction leads to the generation of waves with frequencies that are multiples of the frequency of the incident wave, minus the frequency of the soliton, wh
Externí odkaz:
http://arxiv.org/abs/2312.05867
We analytically solve the problem of Bose star growth in the bath of gravitationally interacting particles. We find that after nucleation of this object the bath is described by a self-similar solution of kinetic equation. Together with the conservat
Externí odkaz:
http://arxiv.org/abs/2305.01005
Publikováno v:
JHEP 12 (2022) 079
We consider oscillons - localized, quasiperiodic, and extremely long-living classical solutions in models with real scalar fields. We develop their effective description in the limit of large size at finite field strength. Namely, we note that nonlin
Externí odkaz:
http://arxiv.org/abs/2208.04334
Publikováno v:
Phys. Rev. D 104, 023504 (2021)
Light bosonic (axion-like) dark matter may form Bose stars - clumps of nonrelativistic Bose-Einstein condensate supported by self-gravity. We study rotating Bose stars composed of condensed particles with nonzero angular momentum $l$. We analytically
Externí odkaz:
http://arxiv.org/abs/2104.00962
Publikováno v:
Astrophysical Journal 925, 109 (2022)
We advance theoretical methods for studying propagation effects in the Fast Radio Burst (FRB) spectra. We derive their autocorrelation function in the model with diffractive lensing and strong Kolmogorov-type scintillations and analytically obtain th
Externí odkaz:
http://arxiv.org/abs/2010.15145
Autor:
Sokolova, E. V., Panin, A. G.
Publikováno v:
A&A 660, A43 (2022)
The pulsar glitches are generally assumed to be an apparent manifestation of the superfluid interior of the neutron stars. Most of them were discovered and extensively studied by continuous monitoring in the radio wavelengths. The Fermi-LAT space tel
Externí odkaz:
http://arxiv.org/abs/2006.15956
Publikováno v:
Phys. Rev. D 102, 023501 (2020)
We study parametric instability of compact axion dark matter structures decaying to radiophotons. Corresponding objects - Bose (axion) stars, their clusters, and clouds of diffuse axions - form abundantly in the postinflationary Peccei-Quinn scenario
Externí odkaz:
http://arxiv.org/abs/2004.05179
Autor:
Ivanov, M. M., Kovalev, Y. Y., Lister, M. L., Panin, A. G., Pushkarev, A. B., Savolainen, T., Troitsky, S. V.
Publikováno v:
JCAP02(2019)059
Ultra-light dark matter may consist of axion-like particles with masses below 10^(-19) eV. Two-photon interactions of these particles affect the polarization of radiation propagating through the dark matter. Coherent oscillations of the Bose condensa
Externí odkaz:
http://arxiv.org/abs/1811.10997
Autor:
Panin, A. G., Smolyakov, M. N.
Publikováno v:
Eur. Phys. J. C 79, 150 (2019)
In this paper, we continue discussing Q-balls in the Wick--Cutkosky model. Despite Q-balls in this model are composed of two scalar fields, they turn out to be very useful and illustrative for examining various important properties of Q-balls. In par
Externí odkaz:
http://arxiv.org/abs/1810.03558
Publikováno v:
Phys. Rev. Lett. 121, 151301 (2018)
We study Bose-Einstein condensation and formation of Bose stars in the virialized dark matter halos/miniclusters by universal gravitational interactions. We prove that this phenomenon does occur and it is described by kinetic equation. We give expres
Externí odkaz:
http://arxiv.org/abs/1804.05857