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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

676

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

11

Strana od-do

A96

Kód UT WoS článku

001046037700014

EID výsledku v databázi Scopus

2-s2.0-85168732944