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Candidates for RR Lyrae in binary systems from the OGLE Galactic bulge survey

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00111912" target="_blank" >RIV/00216224:14310/19:00111912 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1093/mnrasl/slz069" target="_blank" >http://dx.doi.org/10.1093/mnrasl/slz069</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1093/mnrasl/slz069" target="_blank" >10.1093/mnrasl/slz069</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Candidates for RR Lyrae in binary systems from the OGLE Galactic bulge survey

  • Original language description

    We present 20 newly discovered candidates for binary systems with an RR Lyrae companion. Using the photometric data from the Optical Gravitational Lensing Experiment (OGLE) and Korea Microlensing Telescope Network (KMTNet) for the Galactic bulge, we searched for binary candidates among non-modulated fundamental-mode RR Lyrae variables. We constructed and investigated over 9000 O - C diagrams for individual pulsators, in order to find signs of the light-travel time effect. We found 20 variables exhibiting cyclic variation in the O - C (time of the observed minus calculated brightness maximum) diagram, which can be associated with a second component in the system, but for confirmation of binarity, a long-term radial velocity study is necessary. The modelling of the O - C diagrams yields orbital parameters, estimates of the semi-amplitude of the radial velocity curve, and the mass function. The orbital periods of our candidates range from 3 to 15 yr. Two of the binary candidates display a minimum mass higher than the assumed mass of the RR Lyrae component, which points towards an evolved companion that can under some circumstances contribute significantly to the total light of the system.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2019

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Monthly Notices of the Royal Astronomical Society

  • ISSN

    1745-3925

  • e-ISSN

    1745-3933

  • Volume of the periodical

    487

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    6

  • Pages from-to

    „L1“-„L6“

  • UT code for WoS article

    000482695900001

  • EID of the result in the Scopus database

    2-s2.0-85068600976