近:在半人马座寻找低质量行星的初步结果

IF 0.3 Q4 COMMUNICATION

Jurnal The Messenger Pub Date : 2019-12-01 DOI:10.18727/0722-6691/5163

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

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引用次数: 11

摘要

信使178 -四分之一| 2019年ESO在拉西拉的3.6米望远镜进行了改装，并用于进行内部直升机的验收测试。随后对环形槽相位掩模(AGPM)日冕仪进行了性能评估，该日冕仪配备了专用光学装置，包括可调线CO2激光器、椭圆镜和锗透镜。测试了4个AGPM日冕仪，其中3个专门针对近滤光片(10-12.5 μm)进行了优化，另一个是2012年生产的旧样品，波长在11 - 13.1 μm之间进行了优化。令人惊讶的是，旧的日冕仪表现最好，在10.5 μm时的抑制比高达400，在3 λ/D时的对比度水平< 10 - 4。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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NEAR: First Results from the Search for Low-Mass Planets in α Cen

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.

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Jurnal The Messenger COMMUNICATION-

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