r-mode astronomy

Astronomy and Astrophysics Iii. Observational Guidelines for Mode Identification

On the basis of almost 2000 b, y photoelectric observations of θ Tucanae collected in an international campaign at two sites and of almost 1500 v, u observations collected at one site, observational guidelines for mode identification have been searched. Not only the generally used plane (Ab−y/Ay versus φb−y φy) but each combination of the nonadiabatic observables including amplitude ratio vs. a...

Astronomy : R . W . Wood Monochromatic Photography of Jupiter and Saturn

Saturation of the R-mode Instability

Rossby waves (r-modes) in rapidly rotating neutron stars are unstable because of the emission of gravitational radiation. As a result, the stellar rotational energy is converted into both gravitational waves and r-mode energy. The saturation level for the r-mode energy is a fundamental parameter needed to determine how fast the neutron star spins down, as well as whether gravitational waves wil...

Gravitational radiation from the r-mode instability

The instability in the r-modes of rotating neutron stars can (in principle) emit substantial amounts of gravitational radiation (GR) which might be detectable by LIGO and similar detectors. Estimates are given here of the detectability of this GR based the non-linear simulations of the r-mode instability by Lindblom, Tohline and Vallisneri. The burst of GR produced by the instability in the rap...

ASTRONOMY AND ASTROPHYSICS Low - frequency p - and g - mode solar oscillations

In order to help the detection and identification of low-frequency p-and g-modes in the solar spectrum observed by ground-based networks and SoHO experiments, we study the properties of low degree (=0-6) low-frequency (100-2000 µHz) solar oscillations. The frequencies of p-and g-modes have been computed for a set of solar models with updated physics. We point out the specific properties of the ...