Speaker
Mr
Mateusz Wisniewicz
(Kepler Institute of Astronomy)
Description
We present numerical calculations of orbital and epicyclic frequencies of nearly circular orbits around rotating neutron stars and strange quark stars. The FPS equation of state was used to describe the structure of neutron stars while the MIT bag model was used to model the equation of state of strange quark stars. All the uniformly rotating stellar configurations were computed in full general relativity.
We find that the vertical epicyclic frequency and the related nodal precession rate of inclined orbits are very sensitive to the oblateness of rotating star. In particular, it has been shown that for rotating stellar models of moderate and high-mass strange quark stars, the sense of the nodal precession changes at a certain rotation rate (Gondek-Rosińska et al. 2014). As it turns out, a similar effect can be observed for rapidly rotating neutron stars.
Primary author
Mr
Mateusz Wisniewicz
(Kepler Institute of Astronomy)
Co-author
Dr
Dorota Rosinska
(Kepler Institute of Astronomy University of Zielona Gora)
