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pro vyhledávání: '"K, Yavuz"'
Some models of gamma-ray bursts (GRBs) invoke nascent millisecond magnetars as the central engine and address the X-ray afterglows with the interaction of magnetar magnetospheres with fallback discs. We study the evolution of fallback discs interacti
Externí odkaz:
http://arxiv.org/abs/2303.04055
Autor:
Çıkıntoğlu, Sercan, Ekşi, K. Yavuz
The distribution of the spin frequencies of neutron stars in low-mass X-ray binaries exhibits a cut-off at 730 Hz, below the break-up frequency (mass-shedding limit) of neutron stars. The absence of the sub-millisecond pulsars presents a problem, giv
Externí odkaz:
http://arxiv.org/abs/2302.10649
Autor:
Çıkıntoğlu, Sercan, Ekşi, K. Yavuz
Some observations and numerical simulations of disc-magnetosphere interaction show that accretion can proceed in the propeller regime. When the Alfv\'en radius is beyond the corotation radius, matter climbs up to the high latitudes where the Alfv\'en
Externí odkaz:
http://arxiv.org/abs/2211.12945
Publikováno v:
A&A 661, A130 (2022)
Pulsars show irregularities in their pulsed radio emission that originate from propagation effects and the intrinsic activity of the source. In this work, we investigate the role played by magnetic reconnection and the formation of plasmoids in the p
Externí odkaz:
http://arxiv.org/abs/2205.01942
We study the general-relativistic dynamics of matter being accreted onto and ejected by a magnetised and nonrotating neutron star. The dynamics is followed in the framework of fully general relativistic magnetohydrodynamics (GRMHD) within the ideal-M
Externí odkaz:
http://arxiv.org/abs/2204.12275
Autor:
Ekşi, K. Yavuz, Şaşmaz, Sinem
We propose a precessing transient magnetar model for the recently discovered radio source GLEAM-X J162759.5-523504.3. We identify the observed period of $\sim 1$ ks as the precession period of the magnetar deformed due to its strong ($B_{\phi} \sim 1
Externí odkaz:
http://arxiv.org/abs/2202.05160
Publikováno v:
Phys. Rev. D 104, 064049 (2021)
The Palatini gravitational action is enlarged by an arbitrary function $f(X)$ of the determinants of the Ricci tensor and the metric, $X=|\textbf{det}.R|/|\textbf{det}.g|$. The resulting Ricci-determinant theory exhibits novel deviations from general
Externí odkaz:
http://arxiv.org/abs/2108.13460
We investigate the chaotic spin-down behavior seen from some pulsars in terms of the nonlinear superfluid dynamics. To this end, we numerically solve the set of equations for the superfluid-normal matter system whose coupling is mediated by creep of
Externí odkaz:
http://arxiv.org/abs/2103.05421
Millisecond magnetars are often invoked as the central engine of some gamma-ray bursts (GRBs), specifically the ones showing a plateau phase. We argue that an apparent plateau phase may not be realized if the magnetic field of the nascent magnetar is
Externí odkaz:
http://arxiv.org/abs/1910.00554
The afterglow emission of some gamma-ray bursts (GRBs) show a shallow decay (plateau) phase implying continuous injection of energy. The source of this energy is very commonly attributed to the spin-down power of a nascent millisecond magnetar. The m
Externí odkaz:
http://arxiv.org/abs/1904.06769