Frequency analysis of the hybrid δ Sct-γ Dor star CoRoT-102314644

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00574934" target="_blank" >RIV/67985815:_____/23:00574934 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0345158" target="_blank" >https://hdl.handle.net/11104/0345158</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202141610" target="_blank" >10.1051/0004-6361/202141610</a>

Result language

angličtina

Original language name

Frequency analysis of the hybrid δ Sct-γ Dor star CoRoT-102314644

Original language description

We aim to analyse the light curve of the hybrid d Sct-? Dor star CoRoT ID 102314644 and characterise its frequency spectrum. Using the detected frequencies, we intend to perform an initial interpretation developing stellar models. The frequency analysis was obtained with a classical Fourier analysis. A detailed analysis of the individual frequencies is performed using phase diagrams and other light curve characteristics. Initial stellar modelling was performed using the Cesam2k and the GYRE code.Results. We detected 29 ? Dor type frequencies in the [0.32 3.66] c/d range and a series of six equidistant periods with a mean period spacing of ?p = 1612 s. In the d Sct domain, we found 38 frequencies in the [8.63 24.73] c/d range and a quintuplet centred on the frequency p(1) = 11.39 c/d, which suggests a rotational period of 3.06 d. The frequency analysis suggests the presence of spots. Nevertheless, we could not dismiss the possibility of a binary system. The initial modelling of the frequency data allowed us to refine its astrophysical parameters. The observed period spacing, a p-mode quintuplet, the possible rotation period, and the analysis of the individual frequencies impose significant constraints on our understanding of differential rotation and magnetic fields operating in A-F-type stars. Nevertheless, it is fundamental to accompany photometric data with spectroscopic measurements to distinguish variations between surface activity from a companion.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Volume of the periodical

676

Issue of the periodical within the volume

August

Country of publishing house

FR - FRANCE

Number of pages

11

Pages from-to

A96

UT code for WoS article

001046037700014

EID of the result in the Scopus database

2-s2.0-85168732944