2016/02/14 by Kalin V. Staykov, Daniela D. Doneva, Stoytcho S. Yazadjiev
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Compact space #Cosmology and Gravitation Theories #General relativity #Geometry #Geophysics and Gravity Measurements #Gravitation #Inertia #Mathematical analysis #Mathematical physics #Mathematics #Moment of inertia #Physics #Quantum mechanics #Scalar (mathematics) #Theoretical physics #Universality (dynamical systems) #astro-ph.HE #gr-qc
paper · pdf · doi:10.1103/physrevd.93.084010
published as Phys. Rev. D 93, 084010 (2016) · 12 pages, 6 figures, 3 tables, typos corrected, comments and references added
arxiv created 2016/02/14 · openalex publication_date 2016/04/07 · arxiv updated 2016/04/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate universal relations between different normalizations of the moment of inertia and the compactness of neutron and strange stars. Slowly rotating as well as rapidly rotating models are studied in general relativity, R2 gravity and scalar-tensor theories of gravity. Moment-of-inertia--compactness relations are examined for different normalizations of the moment of inertia. It is shown that for all studied cases the deviations from equation-of-state universality are small for the examined equations of state. It turns out that in some of the cases the examined relations are also theory independent to a good extent. Universality in relations between the maximum mass and the moment of inertia for some unstable models is also investigated.