Iodine-Cell Spectroscopy at Okayama Astrophysical Observatory: First Results
Iodine-Cell Spectroscopy at Okayama Astrophysical Observatory: First Results
复制标题
冈山天体物理观测站的碘细胞光谱：初步结果
DOI：
10.1093/pasj/54.1.113
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发表时间：
2002
影响因子：
2.3
通讯作者：
Shoken M. M Iyama
中科院分区：
文献类型：
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作者：
Yoichi T Akeda;B. S. Ato;E. K. ambe;Etsuji W Atanabe;Hideaki M Iyazaki;Setsuko W Ada;Hiroyasu A Ndo;Seiji M Asuda;Hideyuki I Zumiura;Hisashi K Oyano;Hideo M Aehara;Yuji N Orimoto;Takafumi O Kada;Yasuhiro S Himizu;Fumihiro U Raguchi;Kenshi Y Anagisawa;Michitoshi Y Oshida;Norio O Kada;Satoshi K Awanomoto;Shoken M. M Iyama
为了在光谱上寻找恒星周围的行星系统，或为星震学探测太阳型恒星的振荡，我们在冈山天体物理观测站开始了一项基于碘池（I2池）技术的非常精确地测定恒星径向速度变化的实验项目。本文报道了利用新研制的I2室获得的数据，并采用实用的快速分析方法对两颗行星恒星（τ Boo和τ Boo）进行测试观测的第一批初步结果。我们证实了内部统计误差最多可以小到5- 6 ms −1。然后，在4-5天的时间跨度内，得到的径向速度解与公认的预测变化相当一致; O-C偏差表明，在实际意义上已经实现了15 ms-1的短时间尺度精度。
Toward the aims of spectroscopically searching for planetary systems around stars, or detecting oscillations of solar-type stars for stellar seismology, we have started an experimental project of very precise determinations of stellar radial velocity variations based on the iodine-cell (I2 cell) technique at Okayama Astrophysical Observatory. We here report on the first preliminary results of test observations for two planet-harboring stars (υ And and τ Boo) based on data obtained by using the newly developed I2 cell and processed with a practical and quick analysis method. We confirmed that the internal statistical error can be as small as 5–6ms −1 at best. Then, the resulting radial velocity solutions turned out to be in reasonable agreement with the well-established predicted variations over a time span of 4–5 days; the O − C deviations indicate that a short-time-scale precision of ∼ 15ms −1 has been accomplished in a practical sense.