# The additional-mode garden of RR Lyrae stars

## TL;DR

This paper analyzes the distribution and characteristics of additional pulsation modes in RR Lyrae stars, revealing their categorization and connections across different types, based on space-based photometric data.

## Contribution

It provides a detailed classification and distribution of additional modes in RR Lyrae stars, enhancing understanding of their pulsation behavior.

## Key findings

- Identification of four major categories of additional modes in RRab stars
- Distribution patterns of these modes in the Petersen diagram
- Connections between modes in different RR Lyrae star types

## Abstract

Space-based photometric missions revealed a surprising abundance of millimagnitude-level additional modes in RR Lyrae stars. The modes that appear in the modulated fundamental-mode (RRab) stars can be ordered into four major categories. Here we present the distribution of these groups in the Petersen diagram, and discuss their characteristics and connections to additional modes observed in other RR Lyrae stars.