DX Cygni: A triple system with mass transfer

@article{49411,
   author = {Wolf, M. and Masek, M. and Zasche, P. and Kučáková, Hana and Hornoch, K.},
   article_number = {April},
   doi = {http://dx.doi.org/10.1016/j.newast.2019.101336},
   keywords = {Stars: Binaries: Eclipsing; Stars: Individual: DX cyg; Stars: Fundamental parameters},
   language = {eng},
   issn = {1384-1076},
   journal = {NEW ASTRONOMY},
   title = {DX Cygni: A triple system with mass transfer},
   url = {https://www.sciencedirect.com/science/article/abs/pii/S138410761930257X?via%3Dihub},
   volume = {76},
   year = {2020}
}

TY  - JOUR
ID  - 49411
AU  - Wolf, M. - Masek, M. - Zasche, P. - Kučáková, Hana - Hornoch, K.
PY  - 2020
TI  - DX Cygni: A triple system with mass transfer
JF  - NEW ASTRONOMY
VL  - 76
IS  - April
SP  - "101336-1"-"101336-5"
EP  - "101336-1"-"101336-5"
SN  - 13841076
KW  - Stars: Binaries: Eclipsing
KW  - Stars: Individual: DX cyg
KW  - Stars: Fundamental parameters
UR  - https://www.sciencedirect.com/science/article/abs/pii/S138410761930257X?via%3Dihub
N2  - A dozen of new precise times of eclipses were measured for the eclipsing binary DX Cygni as a part of our long-term observational project for studying neglected eclipsing binaries with a short orbital period. Based on a current O - C diagram, we found for the first time that its period is increasing (dP/P = 1.68 X 10(-7) day/years) and that times of minima show also significant cyclical changes with a period of about 16 years, caused very probably by a third body orbiting the eclipsing pair. The minimal mass of this companion is 0.49 M-circle dot. The light curve solution in PHOEBE results to the typical Algol-type semidetached configuration where the secondary fills its Roche lobe. The temperature of primary component was fixed to T-1 = 5300 K according to its spectral type, which gives us T-2 = 3330 +/- 20 K for the secondary. The photometric mass ratio was estimated q = 0.504 +/- 0.012. We also compare orbital parameters of selected known Algol-type eclipsing binaries with proven mass transfer and a third body.
ER  - 

WOLF, M., M. MASEK, P. ZASCHE, Hana KUČÁKOVÁ and K. HORNOCH. DX Cygni: A triple system with mass transfer. \textit{NEW ASTRONOMY}. 2020, vol.~76, April, p.~''101336-1''-''101336-5'', 5 pp. ISSN~1384-1076. Available from: https://dx.doi.org/10.1016/j.newast.2019.101336.