The pulsating theory explains how these pulsations occur. According to this theory, pulsating variable stars have an imbalance between the inward gravitational force and the outward force created by the star's internal gas pressure. This imbalance causes the star to alternately expand and contract, leading to changes in its luminosity.
One key factor in the pulsating theory is the star's internal structure. The pulsations are driven by processes occurring in the star's interior, such as changes in temperature, density, and ionization levels. The specific properties of these processes determine the star's pulsation period and the characteristics of its light variations.
The pulsating theory has been extensively studied and developed over the years, and it forms the basis for understanding the behavior of many types of variable stars, including Cepheid variables, RR Lyrae variables, and Mira variables, among others. By analyzing the pulsations of these stars, astronomers can infer important information about their physical properties, evolutionary stages, and distances in the universe.
In summary, the pulsating theory explains how certain stars undergo periodic pulsations in their outer layers, resulting in variations in their brightness. It provides a theoretical framework for understanding and classifying pulsating variable stars and has significant implications for stellar astrophysics and distance measurements in the cosmos.
