Monitoring Period Variations of Variable Stars using Precise Photometric Surveys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00108284" target="_blank" >RIV/00216224:14310/19:00108284 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1017/S174392131800234X" target="_blank" >https://doi.org/10.1017/S174392131800234X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S174392131800234X" target="_blank" >10.1017/S174392131800234X</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Monitoring Period Variations of Variable Stars using Precise Photometric Surveys

Popis výsledku v původním jazyce

The period variations of rotating, pulsating and eclipsing variable stars bear valuable astrophysical information about the presence of companions, evolutionary effects, and the inner structure of the stars. This talk described a universal method for de-trending and re-scaling precise photometric data (Kepler, MOST, CoRoT, OGLE, …) appropriate for period-change diagnostics of periodic variables. We demonstrated the potential of the method by analysing the period variability of one of the newly-identified Kepler magnetic chemically-peculiar (mCP) stars. We showed that, surprisingly, our target star displays near-sinusoidal changes in its observed light-variations, with a period of 2.85(6) years, which is apparently the result of the presence of a nearby stellar companion. The expected long-term changes of the rotational period, as have been observed in several mCP stars, have not been identified among the sample of Kepler mCP stars.

Název v anglickém jazyce

Monitoring Period Variations of Variable Stars using Precise Photometric Surveys

Popis výsledku anglicky

The period variations of rotating, pulsating and eclipsing variable stars bear valuable astrophysical information about the presence of companions, evolutionary effects, and the inner structure of the stars. This talk described a universal method for de-trending and re-scaling precise photometric data (Kepler, MOST, CoRoT, OGLE, …) appropriate for period-change diagnostics of periodic variables. We demonstrated the potential of the method by analysing the period variability of one of the newly-identified Kepler magnetic chemically-peculiar (mCP) stars. We showed that, surprisingly, our target star displays near-sinusoidal changes in its observed light-variations, with a period of 2.85(6) years, which is apparently the result of the presence of a nearby stellar companion. The expected long-term changes of the rotational period, as have been observed in several mCP stars, have not been identified among the sample of Kepler mCP stars.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Symposium S339 (Southern Horizons in Time-Domain Astronomy)

ISBN

—

ISSN

1743-1913

e-ISSN

—

Počet stran výsledku

4

Strana od-do

110-113

Název nakladatele

Cambridge University Press

Místo vydání

Neuveden

Místo konání akce

Cape Town, South Africa

Datum konání akce

13. 11. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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