In that derivation, he showed that the pulsation period of a Cepheid depends on the average density within the star. This period-mean density relationship forms the basis for understanding stellar pulsation.

Beginning with the discovery around 1600 of the pulsation of Mira (o Ceti), and in 1784 of that of δ Cephei, eight major types of pulsating stars have been found.

1. Introduction The pulsation is a global oscillation of a star. If the oscillation is spherically symmetric, it is called radial pulsation. One the other hand, if the oscillation does not have spherical symmetry, it is …

At the same time the relation between the pulsation period and evolutionary properties allows us to test stellar evolution predictions through independent pulsational constraints. In this review, we discuss …

One way to quantify this is to compare the energy content “stored” in the layers in the star above a certain point, qs, with the energy which passes through these layers in one pulsation period,

To exclude a pulsation artifact resulting from pulsatile arterioles close to the recording elec-trode, we tested for the neurogenic origin of the oscillatory LFP by interfering with the viability of the tissue.

If the adiabatic approximation were exact, or in other words if the entropy of every gas element were constant through the pulsation cycle, then the energy in pulsations would be conserved.

In this talk, we will trace this development that led to theoretical explanations of period-luminosity relations, new mechanisms of pulsation driving, connections with mass loss and stellar …

Much of the picture of stellar pulsation that we have been painting is a valid view of gravity modes, too; they also probe the interiors of stars, and let us see below their surfaces.

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 period …