Zobrazeno 1 - 10
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pro vyhledávání: '"Çıkıntoğlu, Sercan"'
Autor:
Çıkıntoğlu, Sercan
Neutron stars might have multipole magnetic fields as implied by recent observations of pulsars. The presence of the quadrupole field might have an effect on the interaction between the disc and the neutron star depending on the location of the inner
Externí odkaz:
http://arxiv.org/abs/2305.04849
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
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
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
Publikováno v:
Phys. Rev. D 97, 124017 (2018)
Deviations from the predictions of general relativity due to energy-momentum squared gravity (EMSG) are expected to become pronounced in the high density cores of neutron stars. We derive the hydrostatic equilibrium equations in EMSG and solve them n
Externí odkaz:
http://arxiv.org/abs/1802.02093
Autor:
Çıkıntoğlu, Sercan
Publikováno v:
Phys. Rev. D 97, 044040 (2018)
The vacuum solutions around a spherically symmetric and static object in the Starobinsky model are studied with a perturbative approach. The differential equations for the components of the metric and the Ricci scalar are obtained and solved by using
Externí odkaz:
http://arxiv.org/abs/1708.00345
Publikováno v:
Phys. Rev. D 96, 084040 (2017)
We study the structure of relativistic stars in $\mathcal{R}+\alpha \mathcal{R}^{2}$ theory using the method of matched asymptotic expansion to handle the higher order derivatives in field equations arising from the higher order curvature term. We fi
Externí odkaz:
http://arxiv.org/abs/1604.02328