A photometric light variation and a 1500 days secondary period in the W UMa system TZ bootis |
| |
| Authors: | Nabil S Awadalla |
| |
| Institution: | (1) Physics Department, University of Bahrain, Bahrain, Egypt;(2) Helwan Institute of Astronomy and Geophysics, Cairo, Egypt |
| |
| Abstract: | Photoelectric observations of the eclipsing variable TZ Bootis, obtained in 1983 and 1986, in the two coloursB andV are presented: They are compared with the previous light curves of the system. The light curve changes show that the system TZ Bootis has a solar-like activity cycle with a period of 1500 days. The primary shows a transit, whereas the secondary shows an occultation minima. The maxima exhibit a large difference suggesting a large complication in the system. The (O-C) trend indicates that the period did not remain constant; a satisfactory representation of all the observed time of minimum light was obtaiend assuming a linear trend in the (O-C)s. The star may be classified to A-type W UMa systems. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
