Solar-like oscillations in Procyon A
Solar-like oscillations in Procyon A
复制标题
南河三 A 中的类太阳振荡
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
A. Blecha
中科院分区:
文献类型:
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作者:
P. Eggenberger;F. Carrier;F. Bouchy;A. Blecha
The F5 subgiant Procyon A (alpha CMi, HR 2943) was observed with the Coralie fiber-fed echelle spectrograph on the 1.2-m Swiss telescope at La Silla in February 1999. The resulting 908 high-accuracy radial velocities exhibit a mean noise level in the amplitude spectrum of 0.11 m s^-1 at high frequency. These measurements show significant excess in the power spectrum between 0.6-1.6 mHz with 0.60 m s^-1 peak amplitude. An average large spacing of 55.5 uHz has been determined and twenty-three individual frequencies have been identified.