p-mode frequencies in solar-like stars. I. Procyon A

p-mode frequencies in solar-like stars. I. Procyon A
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类太阳恒星中的 p 模频率。

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发表时间:
2004
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通讯作者:
S. Korzennik
S. Korzennik
中科院分区:
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文献类型:
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作者:
M. Martić;J. Lebrun;T. Appourchaux;S. Korzennik

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作为利用高分辨率吸收线光谱研究类太阳恒星p模特征的一部分,我们研究了四颗恒星(α CMi,η Cas A,α Her A和β Vir)。在这里,我们提出了新的结果,从两个站点的观测南河三A在1999年获得了超过12个夜晚。在这些多普勒频移测量的功率谱中检测到l=1和0(或2)p -模式的振荡频率。频率分析指出经典渐近理论在描述南河三A的p模谱时的困难。
As a part of an on-going program to explore the signature of p -modes in solar-like stars by means of high-resolution absorption line spectroscopy, we have studied four stars ( α  CMi, η  Cas A, ζ  Her A and β  Vir). We present here new results from two-site observations of Procyon A acquired over twelve nights in 1999. Oscillation frequencies for $l=1$ and 0 (or 2) p -modes are detected in the power spectra of these Doppler shift measurements. A frequency analysis points out the difficulties of the classical asymptotic theory in representing the p -mode spectrum of Procyon A.