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