The O-type eclipsing contact binary LY Aurigae - member of a quadruple system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10193074" target="_blank" >RIV/00216208:11320/13:10193074 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/13:00421323
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201322153" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201322153</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201322153" target="_blank" >10.1051/0004-6361/201322153</a>
Alternative languages
Result language
angličtina
Original language name
The O-type eclipsing contact binary LY Aurigae - member of a quadruple system
Original language description
The eclipsing binary LY Aur (O9II + O9III) belongs to the rare class of early-type contact systems. We obtained 23 new spectra at the Ondrejov and Dominion Astrophysical Observatories, which were analysed with four older Calar Alto and one ELODIE archivespectra. A new result of this study is that the visual companion of LY Aur - the spectral lines of which are clearly seen in our spectra - is also an SB1 binary having an orbital period of 20(d).46, an eccentric orbit, and a radial velocity semi-amplitude of 33 km s(-1). The H alpha line blend contains an emission component, which shows dependence on the orbital phase of the eclipsing system, with the strongest emission around the secondary eclipse. Revised elements of the eclipsing binary and the orbital solution of the companion binary are determined from our set of spectra and new light-curve solutions of the eclipsing pair. The mass of the primary of 25.5 M-circle dot agrees well with its spectral type, whereas the secondary mass o
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
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
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy and Astrophysics
ISSN
0004-6361
e-ISSN
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Volume of the periodical
559
Issue of the periodical within the volume
listopad
Country of publishing house
FR - FRANCE
Number of pages
8
Pages from-to
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UT code for WoS article
000327847200022
EID of the result in the Scopus database
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