Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Hovik Grigorian"'
Publikováno v:
Particles, Vol 3, Iss 2, Pp 477-499 (2020)
The relativistic mean field (RMF) model of the nuclear matter equation of state was modified by including the effect of Pauli-blocking owing to quark exchange between the baryons. Different schemes of a chiral enhancement of the quark Pauli blocking
Externí odkaz:
https://doaj.org/article/fbef366f254446f89b40b6a655a50462
Was GW170817 a Canonical Neutron Star Merger? Bayesian Analysis with a Third Family of Compact Stars
Publikováno v:
Universe, Vol 6, Iss 6, p 81 (2020)
We investigate the possibility that GW170817 was not the merger of two conventional neutron stars (NS), but involved at least one if not two hybrid stars with a quark matter core that might even belong to a third family of compact stars. To this end,
Externí odkaz:
https://doaj.org/article/0eece708c4f1462aa640fdb01d2133be
Publikováno v:
Universe, Vol 5, Iss 2, p 61 (2019)
We develop a Bayesian analysis method for selecting the most probable equation of state under a set of constraints from compact star physics, which now include the tidal deformability from GW170817. We apply this method for the first time to a two-pa
Externí odkaz:
https://doaj.org/article/d0024faccae44589bb7e2d11fad43fad
Publikováno v:
Universe, Vol 4, Iss 9, p 94 (2018)
First-order phase transitions, such as the liquid-gas transition, proceed via formation of structures, such as bubbles and droplets. In strongly interacting compact star matter, at the crust-core transition but also the hadron-quark transition in the
Externí odkaz:
https://doaj.org/article/95a6a79da06e4d058c46f788d30e63f6
Publikováno v:
Universe, Vol 4, Iss 2, p 29 (2018)
Exploiting a stiff equation of state of the relativistic mean-field model MKVORH ϕ with σ -scaled hadron effective masses and couplings, including hyperons, we demonstrate that the existing neutron-star cooling data can be appropriately described w
Externí odkaz:
https://doaj.org/article/b506a814d88d4c9a98c82998d4dd4258
Autor:
Péter Pósfay, Gergely Gabor Barnafoldi, Alexander Ayriyan, Hovik Grigorian, David Alvarez-Castillo
Publikováno v:
The European Physical Journal Special Topics. 229:3615-3628
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::400d247635bc533f14ed64d9d956e203
https://doi.org/10.1140/epjst/e2020-000106-4
https://doi.org/10.1140/epjst/e2020-000106-4
Publikováno v:
2021 IEEE Latin-American Conference on Communications (LATINCOM).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::014f84c74efa40cd819e8a24e608d8ec
https://doi.org/10.1109/latincom53176.2021.9647799
https://doi.org/10.1109/latincom53176.2021.9647799
Autor:
Vahagn Abgaryan, Alexander Ayriyan, Ana Gabriela Grunfeld, David Alvarez-Castillo, David Blaschke, Hovik Grigorian
Publikováno v:
The European Physical Journal A. 57
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b45e099faf16fc749c9503ad4e85109d
https://doi.org/10.1140/epja/s10050-021-00619-0
https://doi.org/10.1140/epja/s10050-021-00619-0
Autor:
David Alvarez-Castillo, Noshad Khosravi Largani, David Blaschke, John Antoniadis, Fridolin Weber, Alexander Ayriyan, V. I. Danchev, Hovik Grigorian
Publikováno v:
Astronomische Nachrichten. 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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6193dcfcb92f44aefb2ce4edb6298d9
https://doi.org/10.1002/asna.201913752
https://doi.org/10.1002/asna.201913752
Publikováno v:
Physics of Particles and Nuclei Letters. 16:300-309
Solving the optimization problem for the characteristics of the thermal source of a cryogenic cell—a multilayer cylindrical sandwich-type configuration designed for a pulsed dosed injection of working substance into the ionization chamber of the so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::053efa193fdfa9f5cb65c002d60554b1
https://doi.org/10.1134/s1547477119030026
https://doi.org/10.1134/s1547477119030026