THE PHYSICAL NATURE AND ORBITAL BEHAVIOR OF THE ECLIPSING SYSTEM DK CYGNI
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10315340" target="_blank" >RIV/00216208:11320/15:10315340 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/0004-6256/149/6/194" target="_blank" >http://dx.doi.org/10.1088/0004-6256/149/6/194</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0004-6256/149/6/194" target="_blank" >10.1088/0004-6256/149/6/194</a>
Alternative languages
Result language
angličtina
Original language name
THE PHYSICAL NATURE AND ORBITAL BEHAVIOR OF THE ECLIPSING SYSTEM DK CYGNI
Original language description
New CCD photometry is presented for the hot overcontact binary DK Cyg together with reasonable explanations for the light and period variations. Historical light and velocity curves from 1962 to 2012 were simultaneously analyzed with the Wilson-Devinney(W-D) synthesis code. The brightness disturbances were satisfactorily modeled by applying a magnetic cool spot on the primary star. Based on 261 times of minimum light that include 116 new timings and span more than 87 years, a period study reveals thatthe orbital period has varied due to a periodic oscillation superimposed on an upward parabola. The period and semi-amplitude of the modulation are about 78.1 years and 0.0037 days, respectively. This detail is interpreted as a light-travel-time effect due to a circumbinary companion with a minimum mass of M-3 = 0.065M(circle dot), within the theoretical limit of similar to 0.07M(circle dot) for a brown dwarf star. The observed period increase at a fractional rate of +2.74 x 10(-10) is i
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomical Journal
ISSN
0004-6256
e-ISSN
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Volume of the periodical
149
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
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UT code for WoS article
000355250400017
EID of the result in the Scopus database
2-s2.0-84934875456