A multisite campaign on the pulsating subdwarf B star PG 1047+003
A multisite campaign on the pulsating subdwarf B star PG 1047+003
复制标题
对脉动亚矮星 B 星 PG 1047 003 进行的多站点活动
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
M. Barstow
中科院分区：
文献类型：
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作者：
D. Kilkenny;M. Billères;R. Stobie;G. Fontaine;R. Shobbrook;D. O’Donoghue;P. Brassard;D. Sullivan;M. Burleigh;M. Barstow
摘要 C T 结果来自脉动亚矮星 B 星 PG 1047a003 的多站点光度测量活动。从三个站点获取了大约 98 小时的数据，占空比为 30%。 PG 1047a003 的光变曲线主要由 6880 ‐7500mHz 范围内的几个频率（周期 133 ‐ 145 sU）组成。我们有一定的信心，确定了 5700 和 9605mHzO104 ‐ 175 sU 之间的 18 个频率，其分数强度的振幅为 0.0004（0.04%），因此，这颗恒星已公布的脉动频率数量增加了一倍，这些脉动对应于低阶和低阶声波模态，多个频率间隔接近 1.05 mHz，表明该恒星的自转周期为 11.0 d。
ABSTRA C T Results are presented from a multisite photometric campaign on the pulsating subdwarf B star, PG 1047a003. Approximately 98 h of data were obtained from three sites, with a duty cycle of ,30 per cent. The light curve of PG 1047a003 is dominated by several frequencies in the range ,6880 ‐7500mHz (periods 133 ‐ 145 sU. We identify, with some confidence, 18 frequencies between 5700 and 9605mHzO104 ‐ 175 sU down to an amplitude of 0.0004 in fractional intensity (0.04 per cent), thus doubling the number of published pulsation frequencies for this star. These pulsations correspond to low-order and low-degree acoustic modes. Several frequency spacings near 1.05mHz suggest a rotation period for the star of 11.0 d.