P-mode observations on Alpha Cen A
P-mode observations on Alpha Cen A
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发表时间：
2001
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影响因子：
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通讯作者：
F. Bouchy;F. Carrier
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文献类型：
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作者：
F. Bouchy;F. Carrier
.我们用ESO拉西拉天文台1.2米瑞士望远镜上的CORALIE摄谱仪清楚地探测到了最近的类太阳G2V星星α Cen A中的p模振荡。本文报道了2001年5月对该星星进行的5个夜晚的观测，获得了1260个高精度径向速度测量值。功率谱清楚地显示了1.7和3 mHz之间的几个可识别的峰值。这些模式的平均大分裂为105.7 µ Hz，振幅约为35 cm s − 1，与理论预期一致。
. We have made a clear detection of p-mode oscillations in the nearest solar-like G2V star α Cen A with the CORALIE spectrograph on the 1.2-m Swiss telescope at the ESO La Silla Observatory. We report the 5 nights of observation on this star in May 2001 during which 1260 high precision radial velocity measurements were obtained. The power spectrum clearly shows several identifiable peaks between 1.7 and 3 mHz. The average large splitting of 105.7 µ Hz and the amplitude of about 35 cm s − 1 of these modes are in agreement with theoretical expectations.