New interior model of neutron stars
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F22%3AA0000205" target="_blank" >RIV/47813059:19630/22:A0000205 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.105.104020" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/PhysRevD.105.104020</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.105.104020" target="_blank" >10.1103/PhysRevD.105.104020</a>
Alternative languages
Result language
angličtina
Original language name
New interior model of neutron stars
Original language description
The Tolman VII solution is considered by some as one of the few analytical solutions to Einstein???s equations, which describes approximately well the interior of neutron stars (NSs). This solution is characterized by the mass M, radius R, and an energy density that varies quadratically with the radial coordinate r. Recently, Jiang and Yagi proposed a modification of this solution, the so-called modified Tolman VII (MTVII) solution, by introducing an additional quartic term to the energy density radial profile. The MTVII solution is an approximate solution to Einstein???s equation, which includes a new parameter ?? that allows the solution to have a better agreement with the energy density profiles for realistic NSs. Here we consider the MTVII solution, showing that for certain values of the parameter ?? and compactness C this solution manifests a region of negative pressure near the surface which leads to negative values of the tidal Love number. To alleviate these drawbacks, we introduce an exact version of the MTVII solution obtained by solving numerically Einstein???s equations for the MTVII energy density profile. As an application of our new exact MTVII (EMTVII) solution, we calculate the tidal Love number and tidal deformability, as a function of C, for different values of the parameter ??. We find that the EMTVII solution predicts a positive tidal Love number for the whole range of allowed values of parameters ??C; ????, in agreement with previous results for realistic NSs.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
—
Volume of the periodical
105
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
„104020-1“-„104020-10“
UT code for WoS article
000807653700009
EID of the result in the Scopus database
2-s2.0-85130202668