On the long-cycle variability of the Algol OGLE-LMC-DPV-065 and its stellar, orbital, and disc parameters

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00518357" target="_blank" >RIV/67985815:_____/19:00518357 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/stz1355" target="_blank" >https://doi.org/10.1093/mnras/stz1355</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stz1355" target="_blank" >10.1093/mnras/stz1355</a>

Result language
angličtina
Original language name
On the long-cycle variability of the Algol OGLE-LMC-DPV-065 and its stellar, orbital, and disc parameters
Original language description
We analyze photometric time series available in archive data sets spanning 124 yr and present the analysis of new high-resolution spectra. A refined orbital period is found of 10(d).031 6267 +/- 0(d).000 0056 without any evidence of variability. In spite of this constancy, small but significant changes in timings of the secondary eclipse are detected. We show that the long period continuously decreases from 350 to 218 d during 13 yr, then remains almost constant for about 10 yr. Our study of radial velocities indicates a circular orbit for the binary and yields a mass ratio of 0.203 +/- 0.001. From the analysis of the orbital light curve, we find that the system contains 13,8 and 2.81 M-circle dot stars of radii 8.8 and 12.6 R-circle dot and absolute bolometric magnitudes -6.4 and -3.0, respectively.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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