Publication:
Bayesian analysis of multimessenger M-R data with interpolated hybrid EoS

Простая страница элемента
dc.contributor.authorAyriyan, A.
dc.contributor.authorGrunfeld, A. G.
dc.contributor.authorAlvarez-Castillo, D.
dc.contributor.authorGrigorian, H.
dc.contributor.authorBlaschke, D.
dc.date.accessioned2024-11-29T23:55:30Z
dc.date.available2024-11-29T23:55:30Z
dc.date.issued2021
dc.description.abstract© 2021, The Author(s).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 finite region of chemical potentials μH< μ< μQ. Fixing the hadronic EoS as the APR one and choosing the color-superconducting, nonlocal NJL model with two free parameters for the quark phase, we perform Bayesian analyses with this two-parameter family of hybrid EoS. Using three different sets of observational constraints that include the mass of PSR J0740+6620, the tidal deformability for GW170817, and the mass-radius relation for PSR J0030+0451 from NICER as obligatory (set 1), while set 2 uses the possible upper limit on the maximum mass from GW170817 as an additional constraint and set 3 instead of the possibility that the lighter object in the asymmetric binary merger GW190814 is a neutron star. We confirm that in any case, the quark matter phase has to be color superconducting with the dimensionless diquark coupling approximately fulfilling the Fierz relation ηD= 0.75 and the most probable solutions exhibiting a proportionality between ηD and ηV, the coupling of the repulsive vector interaction that is required for a sufficiently large maximum mass. We used the Bayesian analysis to investigate with the method of fictitious measurements the consequences of anticipating different radii for the massive 2M⊙ PSR J0740+6220 for the most likely equation of state. With the actual outcome of the NICER radius measurement on PSR J0740+6220 we could conclude that for the most likely hybrid star EoS would not support a maximum mass as large as 2.5M⊙ so that the event GW190814 was a binary black hole merger.
dc.identifier.citationBayesian analysis of multimessenger M-R data with interpolated hybrid EoS / Ayriyan, A. [et al.] // European Physical Journal A. - 2021. - 57. - № 11. - 10.1140/epja/s10050-021-00619-0
dc.identifier.doi10.1140/epja/s10050-021-00619-0
dc.identifier.urihttps://www.doi.org/10.1140/epja/s10050-021-00619-0
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85120034441&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000723659300003
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/25039
dc.relation.ispartofEuropean Physical Journal A
dc.titleBayesian analysis of multimessenger M-R data with interpolated hybrid EoS
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue11
oaire.citation.volume57
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
Файлы
Коллекции
Публикации