The puzzling binary HD 143418

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00028628" target="_blank" >RIV/00216224:14310/09:00028628 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The puzzling binary HD 143418

Popis výsledku v původním jazyce

HD 143418 is a double-lined binary, whose primary was designated as CP star. We acquired new spectra in order to study spectral line variability, a possible magnetic field and for abundance determination, which was performed by means of synthetic spectra. The photometric observations were subjected to a PCA disentangling of the complex photometric behaviour. Equivalent widths of the lines selected do not change; the star has no magnetic field. The abundance agrees solar chemical composition. The photometric variability is due to ellipticity of the primary component. We conclude the primary is a normal, mildly evolved A5V main sequence star. Seasonal orbitally modulated light variations may be related to the expected incidence of circumstellar matter originated from tidally spinning up primary component. HD 143418 may be a prototype of a rare detached interacting close binary containing subsynchronously rotating primary passing through its synchronisation stage.

Název v anglickém jazyce

The puzzling binary HD 143418

Popis výsledku anglicky

HD 143418 is a double-lined binary, whose primary was designated as CP star. We acquired new spectra in order to study spectral line variability, a possible magnetic field and for abundance determination, which was performed by means of synthetic spectra. The photometric observations were subjected to a PCA disentangling of the complex photometric behaviour. Equivalent widths of the lines selected do not change; the star has no magnetic field. The abundance agrees solar chemical composition. The photometric variability is due to ellipticity of the primary component. We conclude the primary is a normal, mildly evolved A5V main sequence star. Seasonal orbitally modulated light variations may be related to the expected incidence of circumstellar matter originated from tidally spinning up primary component. HD 143418 may be a prototype of a rare detached interacting close binary containing subsynchronously rotating primary passing through its synchronisation stage.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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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

2009

Kód důvěrnosti údajů

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

Název periodika

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Svazek periodika

39

Číslo periodika v rámci svazku

506

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

12

Strana od-do

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Kód UT WoS článku

000271374800033

EID výsledku v databázi Scopus

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