论文标题
V608 Cassiopeiae：W uma型黯然失色的二进制文件与两个可能的环形同伴
V608 Cassiopeiae: A W UMa-type eclipsing binary with two possible circumbinary companions
论文作者
论文摘要
我们从光曲线和日食时机的详细研究中介绍了V608 CA的光度特性。光曲线合成表明，截止对是一种过度感染二进制，参数为$ΔT$ = 155 K，$ q $ = 0.328，$ f $ = 26％。我们检测到第三light $ \ ell_ {3} $，该$分别对应于$ v $和$ r $ bands的总系统光的8％和5％。包括我们的6次计时测量值，总共使用了38倍的最小光进行期间研究。发现V608 CAS的轨道周期在向上抛物线和两个周期性变化的某种组合中有所不同。 The continuous period increase with a rate of $+$3.99$\times$10$^{-7}$ d yr$^{-1}$ can be interpreted as a mass transfer from the secondary component to the primary star at a rate of 1.51$\times$10$^{-7}$ M$_\odot$ yr$^{-1}$.这两个周期性变化的周期和半缩小约为$ p_3 $ = 16.0 yr和$ p_4 $ = 26.3 yr，$ k_3 $ = 0.0341 d和$ k_4 $ = 0.0305 d。两个循环的最可能解释是一对光线的时间效应，该效果可能是由于可能存在的第三和第四组件的存在，估计质量为$ m_3 $ = 2.20 m $ _ \ odot $和$ m_4 $ = 1.27 m $ $ _ \ odot $ _ \ odot $ odot $ odot $ $ e_3 $ $ e_3 $ = 0.66 $ = 0.66和$ e_4 $ = 0.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52。由于$ \ ell_ {3} $的贡献与两个电路对象的估计质量相比非常低，因此可以推断为非常微弱的紧凑对象。
We present the photometric properties of V608 Cas from detailed studies of light curves and eclipse timings. The light curve synthesis indicates that the eclipsing pair is an overcontact binary with parameters of $ΔT$ = 155 K, $q$ = 0.328, and $f$ = 26 %. We detected the third light $\ell_{3}$, which corresponds to about 8 % and 5 % of the total systemic light in $V$ and $R$ bands, respectively. Including our 6 timing measurements, a total of 38 times of minimum light were used for a period study. It was found that the orbital period of V608 Cas has varied in some combination of an upward parabola and two periodic variations. The continuous period increase with a rate of $+$3.99$\times$10$^{-7}$ d yr$^{-1}$ can be interpreted as a mass transfer from the secondary component to the primary star at a rate of 1.51$\times$10$^{-7}$ M$_\odot$ yr$^{-1}$. The periods and semi-amplitudes of the two periodic variations are about $P_3$ = 16.0 yr and $P_4$ = 26.3 yr, and $K_3$ = 0.0341 d and $K_4$ = 0.0305 d, respectively. The most likely explanation of both cycles is a pair of light-traveling time effects operated by the possible presence of third and fourth components with estimated masses of $M_3$ = 2.20 M$_\odot$ and $M_4$ = 1.27 M$_\odot$ in eccentric orbits of $e_3$ = 0.66 and $e_4$ = 0.52. Because the contribution of $\ell_{3}$ is very low compared to the estimated masses of two circumbinary objects, they can be inferred as very faint compact objects.
