# A modulated RRd star observed by K2

## TL;DR

This paper presents the first space-based observation of a modulated double-mode RR Lyrae star, revealing amplitude and phase modulations in both pulsation modes, providing new insights into stellar pulsation behavior.

## Contribution

It introduces the first space observation of a modulated RRd star, highlighting the presence of amplitude and phase modulations in both modes.

## Key findings

- Amplitude and phase modulation observed in both modes.
- First space-based detection of a modulated RRd star.

## Abstract

We report the analysis of the double-mode RR Lyrae star EPIC 205209951, the first modulated RRd star observed from space. The amplitude and phase modulation are present in both modes.