Many intrinsic variable stars that pulsate with large amplitudes, such as the classical Cepheids, RR Lyrae stars and large-amplitude Delta Scuti stars show regular light curves.

The proper way to determine pulsational stability is to linearize the full non-steady stellar structure equations and solve for the complex eigenfrequencies directly.

Dec 20, 2025 · A large body of evidence suggests that all members of this first class of variable stars owe their variability to pulsation. The pulsation theory was first proposed as a possible …

The radial oscillations of a pulsating star are the result of sound waves resonating in the stellar interior. A rough estimate of the pulsation period Π can be obtained by considering how long it …

This is as it should be, for the pulsation of a star, being a hydrodynamic phenomenon, should take place on the hydrodynamic time scale roughly equal to the sound crossing time.

The study of pulsating stars constitutes a relatively small, but highly important, area of modern stellar astrophysics. The idea that certain types of variable stars owe their variability to periodic …

The pulsation of a star must correspond to a change in density, and therefore also pressure in the hydrostatic coupling. Fluctuations of these quantities are sound waves, and so the Cepheid …

In this review, we discuss the physics on the basis of stellar pulsation and of PL relations (in Section 2). In Section 3 we illustrate the state of the art of the modeling of pulsating stars, …

Jun 4, 2025 · Stellar pulsation is a complex phenomenon that involves the periodic expansion and contraction of a star. This behavior is governed by various physical processes, including …

Asteroseismology uses the frequencies, amplitudes and phases from observations of pulsating stars directly to model and probe the stellar interiors. But the sounds are intellectually …