HS Hydrae about to turn off its eclipses

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10129491" target="_blank" >RIV/00216208:11320/12:10129491 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201219392" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201219392</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201219392" target="_blank" >10.1051/0004-6361/201219392</a>

Jazyk výsledku

angličtina

Název v původním jazyce

HS Hydrae about to turn off its eclipses

Popis výsledku v původním jazyce

Aims. We aim to perform the first long-term analysis of the system HS Hya. Methods. We performed an analysis of the long-term evolution of the light curves of the detached eclipsing system HS Hya. Collecting all available photometric data since its discovery, the light curves were analyzed with a special focus on the evolution of system's inclination. Results. We find that the system undergoes a rapid change of inclination. Since its discovery until today the system's inclination changed by more than 15degrees The shape of the light curve changes, and now the eclipses are almost undetectable. The third distant component of the system is causing the precession of the close orbit, and the nodal period is about 631 yr. Conclusions. New precise observations are desperately needed, preferably this year, because the amplitude of variations is decreasing rapidly every year. We know only 10 such systems on the whole sky at present.

Název v anglickém jazyce

HS Hydrae about to turn off its eclipses

Popis výsledku anglicky

Aims. We aim to perform the first long-term analysis of the system HS Hya. Methods. We performed an analysis of the long-term evolution of the light curves of the detached eclipsing system HS Hya. Collecting all available photometric data since its discovery, the light curves were analyzed with a special focus on the evolution of system's inclination. Results. We find that the system undergoes a rapid change of inclination. Since its discovery until today the system's inclination changed by more than 15degrees The shape of the light curve changes, and now the eclipses are almost undetectable. The third distant component of the system is causing the precession of the close orbit, and the nodal period is about 631 yr. Conclusions. New precise observations are desperately needed, preferably this year, because the amplitude of variations is decreasing rapidly every year. We know only 10 such systems on the whole sky at present.

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

<a href="/cs/project/GAP209%2F10%2F0715" target="_blank" >GAP209/10/0715: Přesné fyzikální vlastnosti horkých hvězd získané studiem dvojhvězd a vícenásobných soustav</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

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

542

Číslo periodika v rámci svazku

červen

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

4

Strana od-do

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Kód UT WoS článku

000305803300160

EID výsledku v databázi Scopus

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