Light Curves and Frequency Analysis of Hybrid δSct-γ Dor Stars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00576368" target="_blank" >RIV/67985815:_____/22:00576368 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0345939" target="_blank" >https://hdl.handle.net/11104/0345939</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Light Curves and Frequency Analysis of Hybrid δSct-γ Dor Stars

Popis výsledku v původním jazyce

Space observations have greatly improved our knowledge of stellar oscillations since they allowed us to discover many oscillation frequencies with small amplitudes that used to be hidden from the ground observations. One of the interesting phenomena revealed was a large number of hybrid δ Sct-γ Dor stars discovered. These objects are low-mass main sequence stars oscillating in radial and non-radial pressure (p) and gravity (g) modes. Thes simultaneous presence of p- and g- modes in these stars makes them excellent targets for asteroseismology since these modes together allow to probe both the external and near-to-core layers of the stars. Nevertheless, their location at the Hertzsprung-Russel diagram indicates they might have surface activity (spots) hindering the correct classification of oscillation modes in the frequency spectrum, especially at low-frequency ranges. Additionally, these objects might be in binary systems, which makes mode classification, and thus the explanation of the origin of their light curve variability, an even more complex task. In this work, we present a frequency analysis of the hybrid δSct-γ Dor star CoRoT-102314644 and summarize the difficulties that arise when classifying the origin of the light curve variations in this type of objects.

Název v anglickém jazyce

Light Curves and Frequency Analysis of Hybrid δSct-γ Dor Stars

Popis výsledku anglicky

Space observations have greatly improved our knowledge of stellar oscillations since they allowed us to discover many oscillation frequencies with small amplitudes that used to be hidden from the ground observations. One of the interesting phenomena revealed was a large number of hybrid δ Sct-γ Dor stars discovered. These objects are low-mass main sequence stars oscillating in radial and non-radial pressure (p) and gravity (g) modes. Thes simultaneous presence of p- and g- modes in these stars makes them excellent targets for asteroseismology since these modes together allow to probe both the external and near-to-core layers of the stars. Nevertheless, their location at the Hertzsprung-Russel diagram indicates they might have surface activity (spots) hindering the correct classification of oscillation modes in the frequency spectrum, especially at low-frequency ranges. Additionally, these objects might be in binary systems, which makes mode classification, and thus the explanation of the origin of their light curve variability, an even more complex task. In this work, we present a frequency analysis of the hybrid δSct-γ Dor star CoRoT-102314644 and summarize the difficulties that arise when classifying the origin of the light curve variations in this type of objects.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Astronomical Journal of Azerbaijan

ISSN

2078-4163

e-ISSN

2078-4171

Svazek periodika

17

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

AZ - Ázerbájdžánská republika

Počet stran výsledku

9

Strana od-do

100-108

Kód UT WoS článku

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EID výsledku v databázi Scopus

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