In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 50, no. 3
T. Pribulla - Ľ. Hambálek - E. Guenther - R. Komžík - E. Kundra - J. Nedoroščík - V. Perdelwitz - M. Vaňko
Detaily:
Rok, strany: 2020, 649 - 671
Jazyk: eng
Kľúčové slová:
Stars: individual: BD And; Stars: binaries: eclipsing; Methods: observational; Techniques: spectroscopy
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2020/Vol_50/No_3/pp649-671_abstract.html
O článku:
BD And is a fairly bright (V = 10.8), active and close (P ∼ 0.9258 days) eclipsing binary. The cyclic variability of the apparent orbital period as well as third light in the light curves indicate the presence of an additional late-type component. The principal aim is the spectroscopic testing of the third-body hypothesis and determination of absolute stellar parameters for both components of the eclipsing binary. First medium and high-resolution spectroscopy of the system was obtained. The broadening-function technique appropriate for heavily-broadened spectra of close binaries was used. The radial velocities were determined fitting the Gaussian functions and rotational profiles to the broadening functions. A limited amount of photometric data has also been obtained. Although the photometric observations were focused on the obtaining the timing information, a cursory light-curve analysis was also performed. Extracted broadening functions clearly show the presence of a third, slowly-rotating component. Its radial velocity is within error of the systemic velocity of the eclipsing pair, strongly supporting the physical bond. The observed systemic radial-velocity and third-component changes do not support the 9 year orbit found from the timing variability. Masses of the components of the eclipsing pair are determined with about 0.5% precision. Further characterization of the system would require long-term photometric and spectroscopic monitoring.
Ako citovať:
ISO 690:
Pribulla, T., Hambálek, Ľ., Guenther, E., Komžík, R., Kundra, E., Nedoroščík, J., Perdelwitz, V., Vaňko, M. 2020. Close eclipsing binary BD And: a triple system. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 50, no.3, pp. 649-671. 1335-1842. DOI: https://doi.org/10.31577/caosp.2020.50.3.649
APA:
Pribulla, T., Hambálek, Ľ., Guenther, E., Komžík, R., Kundra, E., Nedoroščík, J., Perdelwitz, V., Vaňko, M. (2020). Close eclipsing binary BD And: a triple system. Contributions of the Astronomical Observatory Skalnaté Pleso, 50(3), 649-671. 1335-1842. DOI: https://doi.org/10.31577/caosp.2020.50.3.649
O vydaní:
Vydavateľ: Astronomical Institute, Slovak Academy of Sciences
Publikované: 1. 7. 2020
Verejná licencia:
