A Complicated Pulsation δ Scuti Variable in Praesepe: HD 74028

A Complicated Pulsation δ Scuti Variable in Praesepe: HD 74028
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DOI:
10.1086/510126
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发表时间:
2007-01
期刊:
The Astronomical Journal
影响因子:
--
通讯作者:
Z. P. Li
Z. P. Li
中科院分区:
其他
文献类型:
--
作者:
Z. P. Li

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我们报道了δScuti星HD 74028的脉动特性,它是普雷塞普星系团中的一个低振幅脉动体。跨越16个夜晚的126小时观测的幅度谱表明了多周期的脉动行为。我们确定了三个频率,f1=22.6652,f2=23.8505,和f3=20.5254个周期-1,并且发现了另外四个候选频率,f4=17.3060,f5=12.0643,f6=14.8160,和f7=17.1143个周期-1。这种复杂的频率分布需要包括旋转分裂在内的解释。
We report the pulsation characteristics of the δ Scuti star HD 74028, a low-amplitude pulsator in the Praesepe cluster. Amplitude spectra of 126 hr of observations spanning 16 nights indicate multiperiodic pulsation behavior. We identify three frequencies, f1 = 22.6652, f2 = 23.8505, and f3 = 20.5254 cycles day-1, and find four additional candidate frequencies, f4 = 17.3060, f5 = 12.0643, f6 = 14.8160, and f7 = 17.1143 cycles day-1. This complicated frequency distribution requires an explanation that includes rotational splitting.