Variable stars across the observational HR diagram

TL;DR

This paper provides a comprehensive overview of pulsating variable stars across the observational HR diagram, highlighting their properties, distributions, recent progress, and future research directions.

Contribution

It introduces a novel visualization of the HR diagram with a third dimension representing variable star properties and summarizes recent advances in the study of variable stars.

Findings

Visualization of variable star distribution with a third dimension.

Summary of recent progress in variable star research.

Discussion of future projects to enhance understanding.

Abstract

An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability. The distribution of variable stars in the other observational diagrams, such as the Period-Amplitude diagram, is also presented. Some of the progresses performed in the field of variable stars during the last decade are briefly summarized, and future projects that will improve our knowledge of variable stars are mentioned.