Asteroseismic analysis of the CoRoT \delta-Scuti star HD174936

TL;DR

This paper analyzes the delta-Scuti star HD174936 observed by CoRoT, identifying 422 frequencies and a quasi-periodic pattern in its oscillation spectrum, suggesting a large separation similar to solar-like stars.

Contribution

It presents the first detailed frequency analysis of HD174936, revealing a significant periodicity and comparing it with stellar models to interpret the oscillation pattern.

Findings

422 frequencies extracted from light curve

Detected a 52 Hz periodicity in oscillation spectrum

Suggests a large separation similar to solar-like stars

Abstract

We present an analysis of the \delta-Scuti star object HD 174936 (ID 7613) observed by CoRoT during the first short run SRc01 (27 days). A total number of 422 frequencies we are extracted from the light curve using standard prewhitening techniques. This number of frequencies was obtained by considering a spectral significance limit of sig = 10 using the software package SigSpec. Our analysis of the oscillation frequency spectrum reveals a spacing periodicity of around 52 \muHz. Although modes considered here are not in the asymptotic regime, a comparison with stellar models confirms that this signature may stem from a quasi-periodic pattern similar to the so-called large separation in solar-like stars.