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

J 2019

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

PRUDIL, Z.; Marek SKARKA; J. LISKA; E.K. GREBEL; C.U. LEE et al.

Základní údaje

Originální název

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

Autoři

PRUDIL, Z.; Marek SKARKA; J. LISKA; E.K. GREBEL a C.U. LEE

Vydání

Monthly Notices of the Royal Astronomical Society, MALDEN, WILEY, 2019, 1745-3925

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/19:00111912

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

binaries: general; stars: horizontal branch; stars: variables: RR Lyrae

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 11. 5. 2020 17:28, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

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.

Návaznosti

EF16_027/0008360, projekt VaV

Název: Postdoc@MUNI

LQ1601, projekt VaV

Název: CEITEC 2020 (Akronym: CEITEC2020)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, CEITEC 2020

Citovat

PRUDIL, Z.; Marek SKARKA; J. LISKA; E.K. GREBEL a C.U. LEE. Candidates for RR Lyrae in binary systems from the OGLE Galactic bulge survey. Monthly Notices of the Royal Astronomical Society. MALDEN: WILEY, 2019, roč. 487, č. 1, s. "L1"-"L6", 6 s. ISSN 1745-3925. Dostupné z: https://doi.org/10.1093/mnrasl/slz069.

@article{1596985,
   author = {Prudil, Z. and Skarka, Marek and Liska, J. and Grebel, E.K. and Lee, C.U.},
   article_location = {MALDEN},
   article_number = {1},
   doi = {https://doi.org/10.1093/mnrasl/slz069},
   keywords = {binaries: general; stars: horizontal branch; stars: variables: RR Lyrae},
   language = {eng},
   issn = {1745-3925},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Candidates for RR Lyrae in binary systems from the OGLE Galactic bulge survey},
   url = {http://dx.doi.org/10.1093/mnrasl/slz069},
   volume = {487},
   year = {2019}
}

TY  - JOUR
ID  - 1596985
AU  - Prudil, Z. - Skarka, Marek - Liska, J. - Grebel, E.K. - Lee, C.U.
PY  - 2019
TI  - Candidates for RR Lyrae in binary systems from the OGLE Galactic bulge survey
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 487
IS  - 1
SP  - "L1"-"L6"
EP  - "L1"-"L6"
PB  - WILEY
SN  - 17453925
KW  - binaries: general
KW  - stars: horizontal branch
KW  - stars: variables: RR Lyrae
UR  - http://dx.doi.org/10.1093/mnrasl/slz069
L2  - http://dx.doi.org/10.1093/mnrasl/slz069
N2  - 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.
ER  -

PRUDIL, Z.; Marek SKARKA; J. LISKA; E.K. GREBEL a C.U. LEE. Candidates for RR Lyrae in binary systems from the OGLE Galactic bulge survey. \textit{Monthly Notices of the Royal Astronomical Society}. MALDEN: WILEY, 2019, roč.~487, č.~1, s.~''L1''-''L6'', 6 s. ISSN~1745-3925. Dostupné z: https://doi.org/10.1093/mnrasl/slz069.

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