Search results for "Stellar pulsation"

showing 2 items of 2 documents

The nonadiabatic general-relativistic stellar oscillations

1990

We have derived the equations which govern the linear nonadiabatic general-relativistic radial oscillations. The perturbation produces a heat flux that is coupled with the geometry, through the Einstein field equations of a stellar configuration. The classical limit is recovered. The stability conditions are examined by means of a simplified one-zone model.

PhysicsComputational astrophysicsClassical mechanicsHeat fluxSpace and Planetary ScienceGeneral relativityEinstein field equationsPerturbation (astronomy)Astronomy and AstrophysicsAstrophysics::Earth and Planetary AstrophysicsRelativistic quantum chemistryClassical limitStellar pulsationAstrophysics and Space Science
researchProduct

An eclipsing millisecond pulsar in the globular cluster Terzan 5

1990

WE HAVE discovered an eclipsing binary millisecond pulsar in the globular cluster Terzan 5. This, the second known eclipsing binary pulsar after PSR1957 + 20, has a pulse period of 11.56 ms and a very short orbital period of 1.8 hours. In contrast to PSR1957 + 20, where the eclipses occupy about 10 per cent of the orbital period1, the eclipse duration in this pulsar is very variable and never less than one-third of the orbital period. The pulsar is in a circular orbit of radius 0.11 light seconds, which implies a minimum companion mass of 0.089 solar masses, about four times the companion mass of PSR1957 + 20. Timing observations suggest an identification of the pulsar with a variable conti…

PhysicsSolar massMultidisciplinaryAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Instrumentation and Methods for AstrophysicsAstronomyAstrophysicsOrbital periodBinary pulsarPulsarMillisecond pulsarGlobular clusterBinary starAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics::Galaxy AstrophysicsStellar pulsationNature
researchProduct