Zobrazeno 1 - 10
of 344
pro vyhledávání: '"Potekhin, A. Y."'
Autor:
Mushtukov, Alexander A., Potekhin, Alexander Y., Nallan, Suraga, Kornacka, Kesja, Ognev, Igor S., Kravtsov, Vadim, Dobrynina, Alexandra A., Kaminker, Alexander D.
X-ray pulsars experiencing extreme mass accretion rates can produce neutrino emission in the MeV energy band. Neutrinos in these systems are emitted in close proximity to the stellar surface and subsequently undergo gravitational bending in the space
Externí odkaz:
http://arxiv.org/abs/2407.12573
Publikováno v:
Phys. Rev. C 109, 055802 (2024)
We previously studied the inner crust and the pasta mantle of a neutron star within the 4th-order extended Thomas-Fermi (ETF) approach with consistent proton shell corrections added perturbatively via the Strutinsky integral (SI) theorem together wit
Externí odkaz:
http://arxiv.org/abs/2404.04020
Publikováno v:
Astronomy Letters, 49, 824-832 (2023)
Superbursts of neutron stars are rare but powerful events explained by the explosive burning of carbon in the deep layers of the outer envelope of the star. In this paper we perform a simulation of superbursts and propose a simple method for describi
Externí odkaz:
http://arxiv.org/abs/2312.02022
Publikováno v:
Astronomy Letters, 49, 583-590 (2023)
A self-consistent radiation-hydrodynamics model of an accretion channel of subcritical X-ray pulsars is constructed. The influence of the presence of resonance in the scattering cross-section on the accretion process and radiation transfer is taken i
Externí odkaz:
http://arxiv.org/abs/2311.17488
Publikováno v:
MNRAS 522, 4830-4840 (2023)
Thermal emission of neutron stars in soft X-ray transients (SXTs) in a quiescent state is believed to be powered by the heat deposited in the stellar crust due to nuclear reactions during accretion (deep crustal heating paradigm). Confronting observa
Externí odkaz:
http://arxiv.org/abs/2303.08716
Publikováno v:
MNRAS 516, 13-25 (2022)
XMM-Newton observations of the middle-aged radio-quiet $\gamma$-ray pulsar J0554+3107 allowed us, for the first time, firmly identify it in X-rays by detection of pulsations with the pulsar period. In the 0.2-2 keV band, the pulse profile shows two p
Externí odkaz:
http://arxiv.org/abs/2208.06160
Autor:
Mushtukov, Alexander A., Markozov, Ivan D., Suleimanov, Valery F., Nagirner, Dmitrij I., Kaminker, Alexander D., Potekhin, Alexander. Y., Zwart, Simon Portegies
Publikováno v:
Phys. Rev. D 105, 103027 (2022)
Compton scattering is a key process shaping spectra formation and accretion flow dynamics in accreting strongly magnetized neutron stars. A strong magnetic field affects the scattering cross section and makes it dependent on photon energy, momentum,
Externí odkaz:
http://arxiv.org/abs/2204.12271
Publikováno v:
A&A 654, A149 (2021)
Electron conduction opacities are one of the main physics inputs for the calculation of low- and intermediate-mass stellar models, and a critical question is how to bridge calculations for moderate and strong degeneracy, which are necessarily perform
Externí odkaz:
http://arxiv.org/abs/2108.11653
Autor:
Schwope, Axel, Pires, Adriana M., Kurpas, Jan, Doroshenko, Victor, Suleimanov, Valery F., Freyberg, Michael, Becker, Werner, Dennerl, Konrad, Haberl, Frank, Lamer, Georg, Maitra, Chandreyee, Potekhin, Alexander Y., Ramos-Ceja, Miriam E., Santangelo, Andrea, Traulsen, Iris, Werner, Klaus
Publikováno v:
A&A 661, A41 (2022)
(abridged version) We present a detailed spectroscopic and timing analysis of X-ray observations of the bright radio-to-gamma-ray emitting pulsar PSR B0656+14, which were obtained simultaneously with eROSITA and XMM-Newton during the Calibration and
Externí odkaz:
http://arxiv.org/abs/2106.14533
Autor:
Kozhberov, A. A., Potekhin, A. Y.
Publikováno v:
Phys. Rev. E 103, 043205 (2021)
Outer crusts of neutron stars and interiors of cool white dwarfs consist of bare atomic nuclei, arranged in a crystal lattice and immersed in a Fermi gas of degenerate electrons. We study electrostatic properties of such Coulomb crystals, taking into
Externí odkaz:
http://arxiv.org/abs/2104.09964