| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 136, Number 3, May I 1999
|
|
|---|---|---|
| Page(s) | 515 - 517 | |
| DOI | https://doi.org/10.1051/aas:1999231 | |
| Published online | 15 May 1999 | |
Multi-period pulsation and amplitude variation behavior
in 
Scuti variable DQ Cephei*
1
Beijing Astronomical Observatory Chinese Academy of Sciences, 100012 Beijing, China
2
Beijing Astronomical Observatory Chinese Academy of Sciences, 100012 Beijing, China
Send offprint request to: Z.P. Li
Received:
22
September
1998
Accepted:
6
November
1998
A period analysis of the data obtained in six nights of differential photoelectric
photometry of the δ Scuti star DQ Cephei (about 42 hours) confirms the pulsation
modes of 
cycle per day and 
cycle per day. The
result adjusts well to the observations that cover a time span of 46 years. Comparing
with the results obtained for different years, we discovered obvious amplitude
variations of the two modes. These amplitude variations show phase differences of
almost 180 degrees. The variation period probably is longer than 46 years.
Key words: stars: δ Sct / oscillations / individual: DQ Cephei
© European Southern Observatory (ESO), 1999