# Variable stars in the Gaia era: Mira, RR Lyrae, delta and Type-II Cepheids

## TL;DR

This paper reviews recent developments in period-luminosity relations of variable stars like RR Lyrae, Cepheids, and Mira variables, emphasizing Gaia data's role in their use as distance indicators and galactic tracers.

## Contribution

It provides an overview of recent period-luminosity relations and discusses Gaia DR1 data applications and future prospects for variable star research.

## Key findings

- Updated period-luminosity relations for key variable stars
- Demonstrated Gaia DR1's impact on variable star studies
- Outlined future research directions

## Abstract

Classical variables like RR Lyrae, classical and Type-II Cepheids and Mira variables all follow period-luminosity relations that make them interesting as distance indicators. Especially the RR Lyrae and delta Cepheids are crucial in establishing the distance scale in the Universe, and all classes of variables can be used as tracers of galactic structure. I will present an overview of recent period-luminosity relations and review the work that has been done using the Gaia DR1 data so far, and discuss possibilities for the future