Long-term variable modes in the δ Scuti variable DQ Cephei

被引：0
|
作者：
Udovichenko, SN
机构：
[1] Odessa II Mechnikov State Univ, Astron Observ, UA-65014 Odessa, Ukraine
[2] Isaac Newton Inst Chile, Odessa Branch, Odessa, Ukraine
来源：
ASTRONOMICAL JOURNAL | 2002年 / 123卷 / 04期
关键词：
delta Scuti; stars : individual (DQ Cephei);
D O I：
10.1086/339309
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Differential CCD photometry of the delta Scuti type star DQ Cephei has been carried out over 10 nights (about 55 hr) in 1998. Frequency analysis of the data confirms two pulsation modes, at f(1) = 12.68 cycles day(-1) and f(2) = 8.049 cycles day(-1). Comparing these observations with results from past years, one can see an amplitude variation in both modes. The variation period will be longer than 50 yr, and the amplitudes of the modes vary with opposite phase.
引用
收藏
页码：2042 / 2044
页数：3
相关论文
共 50 条
  • [1] Multi-period pulsation and amplitude variation behavior in δ Scuti variable DQ Cephei
    Li, ZP
    Fang, MJ
    ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 136 (03): : 515 - 517
  • [2] LONG-TERM RESEARCH ON INTELLIGENCE VARIABLE
    THYSSEN, S
    NORDISK PSYKOLOGI, 1970, 22 (02): : 152 - 153
  • [3] Reversible long-term integration with variable stepsizes
    Hairer, E
    Stoffer, D
    SIAM JOURNAL ON SCIENTIFIC COMPUTING, 1997, 18 (01): : 257 - 269
  • [4] Long-term variations in β Cephei stars
    Jerzykiewicz, M
    Pigulski, A
    HALF CENTURY OF STELLAR PULSATION INTERPRETATIONS: A TRIBUTE TO ARTHUR N. COX, 1998, 135 : 43 - 47
  • [5] On the variable spectrum of delta Cephei
    Krieger, CJ
    ASTROPHYSICAL JOURNAL, 1937, 85 (04): : 304 - 324
  • [6] The variable spectrum of VV Cephei
    McLaughlin, DB
    ASTROPHYSICAL JOURNAL, 1934, 79 (04): : 380 - 394
  • [7] A NEW DELTA SCUTI VARIABLE
    JONES, DHP
    HASLAM, CM
    OBSERVATORY, 1966, 86 (950): : 34 - &
  • [8] Long-term behaviour of the variable wind of P Cygni
    Kolka, I
    VARIABLE AND NON-SPHERICAL STELLAR WINDS IN LUMINOUS HOT STARS, 1999, 523 : 268 - 271
  • [9] Long-term demography of the Northern Goshawk in a variable environment
    Reynolds, Richard T.
    Lambert, Jeffrey S.
    Flather, Curtis H.
    White, Gary C.
    Bird, Benjamin J.
    Baggett, L. Scott
    Lambert, Carrie
    De Volo, Shelley Bayard
    WILDLIFE MONOGRAPHS, 2017, 197 (01) : 1 - 40
  • [10] Long-term stability of variable stepsize approximations of semigroups
    Bakaev, N
    Ostermann, A
    MATHEMATICS OF COMPUTATION, 2002, 71 (240) : 1545 - 1567
12345