Possible companions in low-mass eclipsing binaries: V380 Dra, BX Tri, and V642 Vir

@article{49460,
   author = {Wolf, M. and Kučáková, Hana and Zasche, P. and Smelcer, L. and Hornoch, K. and Honkova, K. and Juryšek, Jakub and Masek, M. and Lehky, M.},
   article_number = {2},
   doi = {http://dx.doi.org/10.31577/caosp.2020.50.2.637},
   keywords = {binaries: eclipsing; stars: late-type; stars: fundamental parameters; stars: individual (V380 Dra; BX Tri; V642 Vir)},
   language = {eng},
   issn = {1335-1842},
   journal = {Contributions of the Astronomical Observatory Skalnaté pleso},
   title = {Possible companions in low-mass eclipsing binaries: V380 Dra, BX Tri, and V642 Vir},
   url = {http://www.astro.sk/caosp/Eedition/Abstracts/2020/Vol_50/No_2/pp637-641_abstract.html},
   volume = {50},
   year = {2020}
}

TY  - JOUR
ID  - 49460
AU  - Wolf, M. - Kučáková, Hana - Zasche, P. - Smelcer, L. - Hornoch, K. - Honkova, K. - Juryšek, Jakub - Masek, M. - Lehky, M.
PY  - 2020
TI  - Possible companions in low-mass eclipsing binaries: V380 Dra, BX Tri, and V642 Vir
JF  - Contributions of the Astronomical Observatory Skalnaté pleso
VL  - 50
IS  - 2
SP  - 637-641
EP  - 637-641
SN  - 13351842
KW  - binaries: eclipsing
KW  - stars: late-type
KW  - stars: fundamental parameters
KW  - stars: individual (V380 Dra
KW  - BX Tri
KW  - V642 Vir)
UR  - http://www.astro.sk/caosp/Eedition/Abstracts/2020/Vol_50/No_2/pp637-641_abstract.html
N2  - We present the new results of our long-term observational project to analyze the orbital period variations of low-mass eclipsing binaries. More then 200 new precise mid-eclipse times recorded with a CCD were obtained for three eclipsing binaries with short orbital periods: V380 Dra (P = 0(d).49), BX Tri (0(d).19), and V642 Vir (0(d). 52). 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 the short orbital periods of possible third bodies of 10-20 years for these objects. We calculated that the minimum masses of the third component are close to 0.2 M-circle dot, which corresponds to the mass of M4 - M5 red 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, L. SMELCER, K. HORNOCH, K. HONKOVA, Jakub JURYŠEK, M. MASEK and M. LEHKY. Possible companions in low-mass eclipsing binaries: V380 Dra, BX Tri, and V642 Vir. \textit{Contributions of the Astronomical Observatory Skalnaté pleso}. 2020, vol.~50, No~2, p.~637-641. ISSN~1335-1842. Available from: https://dx.doi.org/10.31577/caosp.2020.50.2.637.