摘要
本文发表了食双星RT And的1984—1985年期间的视向速度观测。依据点源模型获得了一组新的分光轨道解。轨道根数分别是:V_(01)=-1.0公里/秒;V_(02)=+5.0公里/秒;K_1=131.4公里/秒;K_2=168.4公里/秒;T_0=HJD2,445,977.0997。q_(sp)=m_2/m_1=0.780。结合文献中的资料,使用Wilson Devinney方法,对视向速度和测光观测作联合求解,得到了该双星的绝对参量:A=3.80R_⊙;R=1.14R_⊙;R=1.05R_⊙;M_1=1.05M_⊙;M_2=0.81M_⊙;L_1=1.78L_⊙;L_2=0.54L_⊙;M_(V_1)=4.14~m;M_(V_2)=5.65~m;距离估算为50pc。主伴星均有主序演化效应。
Radial-velocity observations in 1984-1985 are presented for the eclipsing binary RT Andromedae. Based on a point source model, new spectroscopic orbital elements are determined. They are: V01 = -1.0 km/sec; V02= +5.0km/sec; K1= 131.4km/sec; K2 = 168.4km/sec; T0 = HJD2,445,977.0997. The mass ratio q(M2/ M1) is found to be 0.780. A joint solution for the radial-velocity and light curves of the binary was carried out with the Wilson-Devinney code. The absolute dimensions are derived to be: A = 3.80R; R1 = 1.14R; R2 = 1.05 R; M1 = 1.05M; M2 = 0.81M. The luminosities and absolute magnitudes are: L1 = 1.78L; L2= 0.54L;Mv1 = 4.m14;Mv2 = 5.m65, respectively. A distance of 50pc is estimated RT And is a detached system consisting of two main sequence stars both of which show a slight departure from the ZAMS.
关键词
食双星
视向速度
测光
恒星
Stars-Eclipsing binaries-masses and radii
