摘要
本文作者用像增强摄谱仪和Reticon探测器获得了大陵五型食双星RT Per的高信噪比的光谱,并用交叉相关函数法测定了它的视向速度.发现RT Per是双谱双星.根据新测定的视向速度,改进了RT Per主星的分光解,并且首次测定了它的伴星的轨道根数.新的分光轨道根数为:T_0=HTD 2,446,038·9332;K_1=55.0公里/秒;K_2=194.7公里/秒;V_0=-8.3公里/秒.在求分光解时假定了双星系统圆周轨道运动.新的光谱表明,RT Per的主星在MK系统中可分类为F5V;伴星是一亚巨星.根据新的分光解和前人的测光研究结果,推算得该双星的绝对参量:A=4.20R_☉;R_1=1.20R_☉;R_2=1.08R_☉;M_1=1.08M_☉;M_2=0.30M_☉.质比q=0.282.
In tensified Reticon spectra have been obtained at high dispersion for the Algol system RT Persei. They were measured by cross-correlation technique. The spectroscopic orbital elements, revised for the primary component and determined for the secondary for the first time, are: To=HJD 2,446,038,9332; K1=55.0km/sec; K2=194.7km/sec; and V_0=-8.3km/sec. The mass ratio(m2/m1) q=0.282 is deduced. A circular orbit is adopted. The spectrum of the primary component is of type F5V with its companion being a subgiant. With the elements determined here and the photometric parameters given in the literature, the absolute dimensions of the binary are derived to be A=4.20 R_⊙, R1=1.20 R_⊙, R2=1.08 R_⊙, M1=1.08 M_⊙, and M2=0.30 M_⊙
出处
《天文学报》
CSCD
北大核心
1990年第2期140-146,共7页
Acta Astronomica Sinica
关键词
恒星
食双星
分光轨道解
Stars—eclipsing binaries—spectroscopic orbits
