Infrahumps detected in Kepler light curve of V1504 Cygni

TL;DR

This paper analyzes Kepler data of V1504 Cygni, identifying orbital, superhump, and infrahump periods, and confirms their consistency with theoretical period relations.

Contribution

It reports the first detection of infrahumps in V1504 Cygni and confirms their periods align with existing period excess-deficit models.

Findings

Detected three distinct periodicities: orbital, superhump, and infrahump.

Measured periods are consistent with theoretical relations.

First identification of infrahumps in this system.

Abstract

We present a power spectral density analysis of the short cadence Kepler data for the cataclysmic variable V1504 Cygni. We identify three distinct periods: the orbital period (1.669\pm0.005 hours), the superhump period (1.733\pm0.005 hours), and the infrahump period (1.628\pm0.005 hours). The results are consistent with those predicted by the period excess-deficit relation.