Polarization degree analysis of objective spectrum in polarization differential stellar coronagraph.
Polarization degree analysis of objective spectrum in polarization differential stellar coronagraph.
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DOI：
10.1364/oe.15.012189
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发表时间：
2007-09
期刊：
影响因子：
3.8
通讯作者：
N. Zubko;N. Baba;S. Morisaki;N. Murakami
中科院分区：
文献类型：
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作者：
N. Zubko;N. Baba;S. Morisaki;N. Murakami
结果表明，偏振度分析是有用的，以找到客观的光谱系外行星沉浸在嘈杂的恒星光谱。本文报道了利用四象限偏振掩模日冕仪进行偏振微分物镜光谱学的实验室实验，希望能从非偏振恒星噪声中分辨出部分偏振的行星信号。行星信号的检测受到减去相互正交偏振的光分量后剩余的恒星噪声的阻碍。利用偏振度可以很好地区分行星光谱。我们还显示了细化的行星模型的光谱。
It is shown that the degree of polarization analysis is useful to find objective spectra of exoplanets immersed in noisy stellar spectra. We report the laboratory experiment of polarization differential objective spectroscopy with a four-quadrant polarization mask coronagraph, where partially polarized planetary signal is expected to be discerned from unpolarized stellar noise. The detection of the planet signal is impeded by the stellar noise remained after subtracting mutually orthogonally polarized components of light. We distinguish clearly the planetary spectrum by use of the degree of polarization. We also show the refinement of the spectrum of the planet model.