• Xian-Feng Zhao

Articles written in Journal of Astrophysics and Astronomy

• The Potential Well-Depth $U^{(N)}_{\Sigma}$ Constraints on the Surface Gravitational Red-shift of a Proto Neutron Star

The influence of the potential well depth $U^{(N)}_{\Sigma}$ of 𝛴 in nuclear matter on the surface gravitational red-shift of a proto neutron star is examined within the framework of the relativistic mean field theory for the baryon octet system. It is found that as $U^{(N)}_{\Sigma}$ increases from -35 MeV to +35 MeV, the surface gravitational red-shift increases and the influence of the negative $U^{(N)}_{\Sigma}$ on the surface gravitational red-shift is larger than that of the positive ones. Furthermore, the 𝑀max/𝑅 and the surface gravitational red-shift corresponding to the maximum mass all increase as the $U^{(N)}_{\Sigma}$ increases, 𝑀max and 𝑅 being the maximum mass of the proto neutron star and the corresponding radius respectively.

• Constraints on the Moment of Inertia of a Proto Neutron Star from the Hyperon Coupling Constants

The influence of the hyperon coupling constants on the moment of inertia of a proto neutron star has been investigated within the framework of relativistic mean field theory for the baryon octet {𝑛, 𝑝, 𝛬, 𝛴-, 𝛴0, 𝛴+, Ξ-, Ξ0} system. It is found that for a proto neutron star, the mass, the moment of inertia and their own maximum values as a function of radius 𝑅 or 𝑀/𝑅 are all more sensitive to the hyperon coupling constants. For all the different hyperon coupling constants mentioned, the case of no hyperons corresponds to the largest moment of inertia.

• # Journal of Astrophysics and Astronomy

Volume 41, 2020
All articles
Continuous Article Publishing mode

• # Continuous Article Publication

Posted on January 27, 2016

Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019