LUT observations of the mass-transferring binary AI Dra
LUT observations of the mass-transferring binary AI Dra
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质量转移二元 AI Dra 的 LUT 观测结果
DOI:
10.1007/s10509-016-2771-7
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发表时间:
2016-05
影响因子:
1.9
通讯作者:
Liu, Nianping
中科院分区:
文献类型:
--
作者:
Li, Linjia;Zhou, Xiao;Zhao, Ergang;Liu, Nianping
Complete UV band light curve of the eclipsing binary AI Dra was observed with the Lunar-based Ultraviolet Telescope (LUT) in October 2014. It is very useful to adopt this continuous and uninterrupted light curve to determine physical and orbital parameters of the binary system. Photometric solutions of the spot model are obtained by using the W–D (Wilson and Devinney) method. It is confirmed that AI Dra is a semi-detached binary with secondary component filling its critical Roche lobe, which indicates that a mass transfer from the secondary component to the primary one should happen. Orbital period analysis based on all available eclipse times suggests a secular period increase and two cyclic variations. The secular period increase was interpreted by mass transfer from the secondary component to the primary one at a rate of 4.12×10−8M⊙/yr$4.12 \times10^{-8}M_{\odot}/\mbox{yr}$, which is in agreement with the photometric solutions. Two cyclic oscillations were due to light travel-time effect (LTTE) via the presence of two cool stellar companions in a near 2:1 mean-motion resonance. Both photometric solutions and orbital period analysis confirm that AI Dra is a mass-transferring binary, the massive primary is filling 69 % of its critical Roche lobe. After the primary evolves to fill the critical Roche lobe, the mass transfer will be reversed and the binary will evolve into a contact configuration.
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影响因子:
1.9
作者:
P. Zasche;R. Uhlář;P. Svoboda
通讯作者:
P. Zasche;R. Uhlář;P. Svoboda
DOI:
10.1111/j.1365-2966.2010.16584.x
发表时间:
2010-04
影响因子:
4.8
作者:
Liao, W. -P.;Qian, S. -B.
通讯作者:
Qian, S. -B.
DOI:
10.1088/0004-6256/144/3/73
发表时间:
2012-07
期刊:
The Astronomical Journal
影响因子:
--
作者:
R. Wilson
通讯作者:
R. Wilson
DOI:
10.5860/choice.27-6327
发表时间:
2021-06
期刊:
Fundamentals of Astrophysics
影响因子:
--
作者:
O. R. Pols
通讯作者:
O. R. Pols
DOI:
10.1086/523634
发表时间:
2008
期刊:
The Astrophysical Journal
影响因子:
--
作者:
R. Wilson
通讯作者:
R. Wilson