HS Hydrae about to turn off its eclipses

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

HS Hydrae about to turn off its eclipses

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GAP209%2F10%2F0715" target="_blank" >GAP209/10/0715: Accurate physical properties of hot stars based on binary and multiple star studies</a><br>

Continuities

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

Publication year

2012

Confidentiality

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

Name of the periodical

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Volume of the periodical

542

Issue of the periodical within the volume

červen

Country of publishing house

DE - GERMANY

Number of pages

4

Pages from-to

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UT code for WoS article

000305803300160

EID of the result in the Scopus database

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