The O-type eclipsing contact binary LY Aurigae - member of a quadruple system

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/67985815:_____/13:00421323

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

The O-type eclipsing contact binary LY Aurigae - member of a quadruple system

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

The O-type eclipsing contact binary LY Aurigae - member of a quadruple system

Popis výsledku anglicky

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

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

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2013

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

559

Číslo periodika v rámci svazku

listopad

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000327847200022

EID výsledku v databázi Scopus

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