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@article{1365456, author = {Liška, Jiří}, article_number = {1}, doi = {http://dx.doi.org/10.1093/mnras/stw1355}, keywords = {binaries: spectroscopic; binaries: visual; stars: chemically peculiar; stars: individual: phi Dra; stars: variables: general}, language = {eng}, issn = {0035-8711}, journal = {Monthly Notices of the Royal Astronomical Society}, title = {Analysis of the multiple system with chemically peculiar component phi Draconis}, url = {http://mnras.oxfordjournals.org/content/461/1/939.full.pdf}, volume = {461}, year = {2016} }
TY - JOUR ID - 1365456 AU - Liška, Jiří PY - 2016 TI - Analysis of the multiple system with chemically peculiar component phi Draconis JF - Monthly Notices of the Royal Astronomical Society VL - 461 IS - 1 SP - 939-947 EP - 939-947 PB - Priestley and Weale SN - 00358711 KW - binaries: spectroscopic KW - binaries: visual KW - stars: chemically peculiar KW - stars: individual: phi Dra KW - stars: variables: general UR - http://mnras.oxfordjournals.org/content/461/1/939.full.pdf L2 - http://mnras.oxfordjournals.org/content/461/1/939.full.pdf N2 - The star phi Dra comprises a spectroscopic binary and a third star that together form a visual triple system. It is one of the brightest chemically peculiar stars of the upper main sequence. Despite these facts, no comprehensive study of its multiplicity has been performed yet. In this work, we present a detailed analysis of the triple system based on available measurements. We use radial velocities taken from four sources in the literature in a re-analysis of the inner spectroscopic binary (Aab). An incorrect value of the orbital period of the inner system Aab about 27 d was accepted in literature more than 40 yr. A new solution of orbit with the 128-d period was determined. Relative position measurements of the outer visual binary system (AB) from Washington Double Star Catalog were compared with known orbital models. Furthermore, it was shown that astrometric motion in system AB is well described by the model of Andrade with a 308-yr orbital period. Parameters of A and B components were utilized to estimate individual brightness for all components and their masses from evolutionary tracks. Although we found several facts which support the gravitational bond between them, unbound solution cannot be fully excluded yet. ER -
LIŠKA, Jiří. Analysis of the multiple system with chemically peculiar component phi Draconis. \textit{Monthly Notices of the Royal Astronomical Society}. Priestley and Weale, 2016, vol.~461, No~1, p.~939-947. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stw1355.
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