The Structure and Signals of Neutron Stars, from Birth to Death

Session

Evening session - Parallel A

28 Mar 2014, 16:30

Conveners

Evening session - Parallel A

• Leonardo Gualtieri (Rome Univ., Italy)

85. Instability windows and evolution of rapidly rotating neutron stars

Mikhail Gusakov

28/03/2014, 16:30

We consider an instability of rapidly rotating neutron stars in low-mass X-ray binaries with respect to excitation of r-modes. We argue that finite temperature effects in the superfluid core of a neutron star lead to a resonance coupling and enhanced damping (and hence stability) of oscillation modes at certain stellar temperatures. We demonstrate that neutron stars with high spin frequency...

89. New possible class of rapidly rotating neutron stars

Andrey Chugunov (I)

28/03/2014, 16:50

We discuss a new hypothetical class of neutron stars dubbed `HOFNARs' (HOt and Fast Non-Accreting Rotators) or `hot widows' (similar to `black widow' pulsars) which are hot and fast-rotating, but do not accrete matter. These sources are unstable with respect to r-modes and are formed in low-mass X-ray binaries (LMXBs), after exhausting the low-mass companion. Their high temperatures are...

95. Magnetic fields and r-modes in slowly rotating relativistic neutron stars

Cecilia Chirenti (UFABC)

28/03/2014, 17:05

We study here the r-modes in the Cowling approximation of a slowly rotating and magnetized neutron star with a poloidal magnetic field, where we neglect any deformations of the spherical symmetry of the star. We were able to quantify the influence of the magnetic field in both the oscillation frequency of the r-modes and the growth time of the gravitational radiation emission. We conclude that...