Zobrazeno 1 - 10
of 241
pro vyhledávání: '"Ayriyan A."'
Autor:
Blaschke, David, Ayriyan, Alexander, Cierniak, Mateusz, Grunfeld, Ana Gabriela, Ivanytskyi, Oleksii, Shahrbaf, Mahboubeh
Publikováno v:
EPJ Web of Conferences 274, 07011 (2022)
We present a systematic investigation of the possible locations for the special point (SP), a unique feature of hybrid neutron stars in the mass-radius diagram. The study is performed within the two-phase approach where the high-density (quark matter
Externí odkaz:
http://arxiv.org/abs/2211.12626
Publikováno v:
Discrete and Continuous Models and Applied Computational Science, Vol 32, Iss 1, Pp 38-47 (2024)
Inthispaper,westudytheeffectofusingtheMetropolis-Hastingsalgorithmforsamplingtheintegrand on the accuracy of calculating the value of the integral with the use of shallow neural network. In addition, a hybrid method for sampling the integrand is prop
Externí odkaz:
https://doaj.org/article/6a3f3870051c4f199ac125f5ff096ee4
Publikováno v:
EPJ Web of Conferences, Vol 108, p 02025 (2016)
A model and algorithm for the cooling of the magnetized neutron stars are presented. The cooling evolution described by a system of parabolic partial differential equations with non-linear coeffcients is solved using the Alternating Direction Implici
Externí odkaz:
https://doaj.org/article/45d8e0b72b8c4d8c9237c38b515364dd
Publikováno v:
EPJ Web of Conferences, Vol 108, p 02010 (2016)
The work describes the maximization problem regarding the heating of an area on the surface of a thin plate within a given temperature range. The solution of the problem is applied to ion injectors. The given temperature range corresponds to the requ
Externí odkaz:
https://doaj.org/article/8a1804102ff6402fbd4358be81e6843c
Publikováno v:
Phys. Rev. D 107, 054011 (2023)
We provide a systematic study of hybrid neutron star equations of state (EoS) consisting of a relativistic density functional for the hadronic phase and a covariant nonlocal Nambu--Jona-Lasinio (nlNJL) model to describe the color superconducting quar
Externí odkaz:
http://arxiv.org/abs/2105.00029
Autor:
Ayriyan, A., Blaschke, D., Grunfeld, A. G., Alvarez-Castillo, D., Grigorian, H., Abgaryan, V.
Publikováno v:
The European Physical Journal A, Volume 57, Article number 318 (2021)
We introduce a family of equations of state (EoS) for hybrid neutron star (NS) matter that is obtained by a two-zone parabolic interpolation between a soft hadronic EoS at low densities and a set of stiff quark matter EoS at high densities within a f
Externí odkaz:
http://arxiv.org/abs/2102.13485
Autor:
Alvarez-Castillo, David, Ayriyan, Alexander, Barnaföldi, Gergely Gábor, Grigorian, Hovik, Pósfay, Péter
Publikováno v:
Eur. Phys. J. Special Topics 229, 22-23, 3615-3628 (2020)
In this work we study the parameters of the extended $\sigma$-$\omega$ model for neutron star matter by a Bayesian analysis on state-of-the-art multi-messenger astronomy observations, namely mass, radius and tidal deformabilities. We have considered
Externí odkaz:
http://arxiv.org/abs/2006.03676
Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
Publikováno v:
Universe 6, 81 (2020)
We investigate the possibility that GW170817 has not been the merger of two conventional neutron stars (NS) but involved at least one if not two hybrid stars with a quark matter core which might even belong to a third family of compact stars. To this
Externí odkaz:
http://arxiv.org/abs/2005.02759
Publikováno v:
Physics of Particles and Nuclei volume 51, pages 725 - 729 (2020)
We present a Bayesian analysis of the Landau mass within the extended $\sigma$-$\omega$ model for neutron star matter. To this purpose, we consider the mass measurement of the object PSR 0740+6620, the tidal deformability estimation from the GW170817
Externí odkaz:
http://arxiv.org/abs/2004.04210
Autor:
Alvarez-Castillo, David Edwin, Antoniadis, John, Ayriyan, Alexander, Blaschke, David, Danchev, Victor, Grigorian, Hovik, Largani, Noshad Khosravi, Weber, Fridolin
Publikováno v:
Astron. Nachr. 2019;340:878-884
A numerical rotating neutron star solver is used to study the temporal evolution of accreting neutron stars using a multi-polytrope model for the nuclear equation of state named ACB5. The solver is based on a quadrupole expansion of the metric, but c
Externí odkaz:
http://arxiv.org/abs/1912.08782