In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 56, no. 2
J.L. Huo - X.H. Wu - W.B. Ding - X.F. Zhao
Detaily:
Strany: 36 - 54
Jazyk: eng
Kľúčové slová:
stars: binaries, general: stars
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2026/Vol_56/No_2/pp36-54_abstract.html
O článku:
The effects of hyperon interactions (occurring through the coupling of hyperons to the σ* and ϕ mesons) on the surface gravitational redshift z of proto-neutron stars (PNSs)—specifically PSR J0740+6620, PSR J0348+0432, PSR J1614-2230, and PSR J0737-3039A—are investigated using relativistic mean field theory. It is found that the increase in central pressure and central energy density due to hyperon interactions becomes more pronounced for higher-mass PNSs, while for lower-mass PNSs this effect is negligible. When hyperon interactions are included, the mass M, compactness M/R, and surface gravitational redshift z of a PNS all decrease at a given central energy density εc. For the higher-mass PNSs PSR J0740+6620 and PSR J0348+0432, the influence of hyperon interactions on compactness M/R and surface redshift z is significant. In contrast, for the lower-mass PNSs PSR J1614-2230 and PSR J0737-3039A, the effect on M/R and z is negligible.
Ako citovať:
ISO 690:
Huo, J., Wu, X., Ding, W., Zhao, X. 2026. Surface gravitational redshift of massive protoneutron stars: effects of σ∗ and φ mesons. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 56, no.2, pp. 36-54. 1335-1842. DOI: https://doi.org/10.31577/caosp.2026.56.2.36
APA:
Huo, J., Wu, X., Ding, W., Zhao, X. (2026). Surface gravitational redshift of massive protoneutron stars: effects of σ∗ and φ mesons. Contributions of the Astronomical Observatory Skalnaté Pleso, 56(2), 36-54. 1335-1842. DOI: https://doi.org/10.31577/caosp.2026.56.2.36
O vydaní:
Vydavateľ: Astronomical Institute, Slovak Academy of Sciences
Publikované: 1. 4. 2026
Verejná licencia:
