KIC 2831097-a 2-yr-orbital-period RR Lyrae binary candidate

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00111641" target="_blank" >RIV/00216224:14310/17:00111641 - isvavai.cz</a>
Result on the web
<a href="https://arxiv.org/pdf/1609.06474.pdf" target="_blank" >https://arxiv.org/pdf/1609.06474.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnrasl/slw194" target="_blank" >10.1093/mnrasl/slw194</a>

Result language
angličtina
Original language name
KIC 2831097-a 2-yr-orbital-period RR Lyrae binary candidate
Original language description
We report the discovery of a new Kepler first-overtone RR Lyrae pulsator, KIC 2831097. The pulsation shows large, 0.1-d amplitude, systematic phase variations that can be interpreted as light traveltime effect caused by orbital motion in a binary system, superimposed on a linear pulsation-period decrease. The assumed eccentric (e = 0.47) orbit with the period of approximate to 2 yr is the shortest among the non-eclipsing RR Lyrae binary candidates. The binary model gives the lowest estimate for the mass of the companion of 8.4 M-circle dot, that places it among black hole candidates. Beside the first-overtone pulsation, numerous additional non-radial pulsation frequencies were also identified. We detected an approximate to 47-d Blazhko-like irregular light-curve modulation.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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