NEAR: First Results from the Search for Low-Mass Planets in α Cen
NEAR: First Results from the Search for Low-Mass Planets in α Cen
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NEAR：在 α Cen 寻找低质量行星的初步结果
DOI：
10.18727/0722-6691/5163
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Carlotti
中科院分区：
文献类型：
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作者：
M. Kasper;R. Arsenault;U. Käufl;G. Jakob;S. Leveratto;G. Zins;E. Pantin;P. Duhoux;M. Riquelme;J. Kirchbauer;J. Kolb;P. Pathak;R. Siebenmorgen;C. Soenke;E. Fuenteseca;M. Sterzik;N. Ageorges;S. Gutruf;D. Kampf;A. Reutlinger;O. Absil;C. Delacroix;A. Maire;E. Huby;O. Guyon;P. Klupar;D. Mawet;G. Ruane;M. Karlsson;K. Dohlen;A. Vigan;M. N’diaye;S. Quanz;A. Carlotti
第178章-第四季|2019年ESO在La Silla的3.6米望远镜被修改并用于进行内部斩波器的验收测试。其次是一个性能评价的环形槽相位掩模（AGPM）coronagelements与一个专用的光学设置，将线可调谐CO2激光器，椭圆镜和锗透镜。测试了四台AGPM日冕仪，其中三台专门针对NEAR滤光片（10-12.5 μm）进行了优化，另一台是2012年制造的旧样品，波长在11 - 13.1 μm之间。令人惊讶的是，旧的冠状动脉造影剂表现最好，在10.5 μm处的拒绝率高达400，在3 λ/D处的对比度水平< 10- 4。
The Messenger 178 – Quarter 4 | 2019 ESO 3.6-metre telescope at La Silla, was modified and used to carry out the acceptance tests of the internal chopper. This was followed by a performance evaluation of the Annular Groove Phase Mask (AGPM) coronagraph with a dedicated optical setup incorporating a line-tunable CO2 laser, elliptical mirrors and germanium lenses. Four AGPM coronagraphs were tested, three specifically optimised for the NEAR filter (10–12.5 μm) and an older sample manufactured in 2012 and optimised for wavelengths between 11 and 13.1 μm. Surprisingly, the older coronagraph performed best, with a rejection ratio of up to 400 at 10.5 μm, and a contrast level of < 10– 4 at 3 λ/D.