Possible substellar companions in low-mass eclipsing binaries:
GU Bootis and YY Geminorum

J 2018

Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum

WOLF, M., Hana KUČÁKOVÁ, P. ZASCHE, J. VRAŠTIL, K. HOŇKOVÁ et. al.

Basic information

Original name

Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum

Authors

WOLF, M., Hana KUČÁKOVÁ (203 Czech Republic, guarantor, belonging to the institution), P. ZASCHE, J. VRAŠTIL, K. HOŇKOVÁ, K. HORNOCH, M. LEHKÝ, M. MAŠEK, L. ŠMELCER, M. TYLŠAR, R. NOVÁK, L. ČERVINKA and M. BĚLÍK

Edition

Astronomy & Astrophysics, 2018, 0004-6361

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 4.378 in 2014

RIV identification code

RIV/47813059:19240/18:A0000356

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.1051/0004-6361/201833708

UT WoS

000452389400002

Keywords in English

binaries: eclipsing; stars: late-type; stars: individual: GU Bootis; stars: individual: YY Geminorum; stars: fundamental parameters

Abstract

V originále

We present the next results of our long-term observational project to analyze the variations in the orbital periods of low-mass eclipsing binaries. About 70 new precise mid-eclipse times recorded with a CCD were obtained for two eclipsing binaries with short orbital periods: GU Boo (P = 0.^{d}49) and YY Gem (0.^{d}81). Observed-minus-calculated diagrams of the stars were analyzed using all reliable timings, and new parameters of the light-time effect were obtained. We derived for the first time or improved the short orbital periods of possible third bodies of 11 and 54 years for these low-mass binaries, respectively. We calculated that the minimum masses of the third components are close to 50 M_{Jup}, which corresponds to the mass of brown dwarfs. The multiplicity of these systems also plays an important role in the precise determination of their physical parameters.

Citovat

WOLF, M., Hana KUČÁKOVÁ, P. ZASCHE, J. VRAŠTIL, K. HOŇKOVÁ, K. HORNOCH, M. LEHKÝ, M. MAŠEK, L. ŠMELCER, M. TYLŠAR, R. NOVÁK, L. ČERVINKA and M. BĚLÍK. Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum. Astronomy & Astrophysics. 2018, vol. 620, December, p. "A72-1"-"A72-7", 7 pp. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201833708.

@article{30252,
   author = {Wolf, M. and Kučáková, Hana and Zasche, P. and Vraštil, J. and Hoňková, K. and Hornoch, K. and Lehký, M. and Mašek, M. and Šmelcer, L. and Tylšar, M. and Novák, R. and Červinka, L. and Bělík, M.},
   article_number = {December},
   doi = {http://dx.doi.org/10.1051/0004-6361/201833708},
   keywords = {binaries: eclipsing; stars: late-type; stars: individual: GU Bootis; stars: individual: YY Geminorum; stars: fundamental parameters},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum},
   url = {https://www.aanda.org/articles/aa/abs/2018/12/aa33708-18/aa33708-18.html},
   volume = {620},
   year = {2018}
}

TY  - JOUR
ID  - 30252
AU  - Wolf, M. - Kučáková, Hana - Zasche, P. - Vraštil, J. - Hoňková, K. - Hornoch, K. - Lehký, M. - Mašek, M. - Šmelcer, L. - Tylšar, M. - Novák, R. - Červinka, L. - Bělík, M.
PY  - 2018
TI  - Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum
JF  - Astronomy & Astrophysics
VL  - 620
IS  - December
SP  - "A72-1"-"A72-7"
EP  - "A72-1"-"A72-7"
SN  - 00046361
KW  - binaries: eclipsing
KW  - stars: late-type
KW  - stars: individual: GU Bootis
KW  - stars: individual: YY Geminorum
KW  - stars: fundamental parameters
UR  - https://www.aanda.org/articles/aa/abs/2018/12/aa33708-18/aa33708-18.html
L2  - https://www.aanda.org/articles/aa/abs/2018/12/aa33708-18/aa33708-18.html
N2  - We present the next results of our long-term observational project to analyze the variations in the orbital periods of low-mass eclipsing binaries. About 70 new precise mid-eclipse times recorded with a CCD were obtained for two eclipsing binaries with short orbital periods: GU Boo (P = 0.^{d}49) and YY Gem (0.^{d}81). Observed-minus-calculated diagrams of the stars were analyzed using all reliable timings, and new parameters of the light-time effect were obtained. We derived for the first time or improved the short orbital periods of possible third bodies of 11 and 54 years for these low-mass binaries, respectively. We calculated that the minimum masses of the third components are close to 50 M_{Jup}, which corresponds to the mass of brown dwarfs. The multiplicity of these systems also plays an important role in the precise determination of their physical parameters.
ER  -

WOLF, M., Hana KUČÁKOVÁ, P. ZASCHE, J. VRAŠTIL, K. HOŇKOVÁ, K. HORNOCH, M. LEHKÝ, M. MAŠEK, L. ŠMELCER, M. TYLŠAR, R. NOVÁK, L. ČERVINKA and M. BĚLÍK. Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum. \textit{Astronomy \&{} Astrophysics}. 2018, vol.~620, December, p.~''A72-1''-''A72-7'', 7 pp. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201833708.

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