Observational studies of 12DD Lacertae |
| |
| Authors: | Naonobu Sato |
| |
| Institution: | (1) Physics Department, Akita University, Akita, Japan |
| |
| Abstract: | All the observational data of 12DD Lacertae obtained have been examined to find a clue to the problem of secular variation or pulsational stability. From the statistical consideration it is concluded that the mean brightness is almost constant within small irregular variation of a few hundredth of a magnitude and the  -velocity also shows small irregular variation of a few km sec–1 during more than a half century; but a result from the least-squares solution is also discussed. No periodicity of the variation in mean magnitude and -velocity has been detected, and an expectation that the small variation in the -velocity might be caused by orbital motion is not confirmed. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
