Detailed Information on Publication Record
2013
Quadrupole moments of rotating neutron stars and strange stars
STUCHLÍK, Zdeněk, Martin URBANEC and John MILLERBasic information
Original name
Quadrupole moments of rotating neutron stars and strange stars
Authors
STUCHLÍK, Zdeněk, Martin URBANEC and John MILLER
Edition
Monthly Notices of the Royal Astronomical Society, GB - Spojené království Velké Británie a, 2013, 0035-8711
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Organization unit
Faculty of Philosophy and Science in Opava
UT WoS
000322403800010
Keywords in English
stars: neutron; stars: rotation
Tags
Tags
International impact, Reviewed
Links
GPP209/12/P740, research and development project. LC06014, research and development project. MSM4781305903, plan (intention).
Změněno: 14/4/2021 15:34, Mgr. Pavlína Jalůvková
Abstract
V originále
We present results for models of neutron stars and strange stars constructed using the Hartle-Thorne slow-rotation method with a wide range of equations of state, focusing on the values obtained for the angular momentum J and the quadrupole moment Q, when the gravitational mass M and the rotational frequency are specified. Building on previous work, which showed surprising uniformity in the behaviour of the moment of inertia for neutron-star models constructed with widely different equations of state, we find similar uniformity for the quadrupole moment. These two quantities, together with the mass, are fundamental for determining the vacuum space-time outside neutron stars. We study particularly the dimensionless combination of parameters QM/J(2) (using units for which c = G = 1). This quantity goes to 1 in the case of a Kerr-metric black hole and deviations away from 1 then characterize the difference between neutron-star and black hole space-time. It is found that QM/J(2) for both n