Around the world: status and prospects with the infrared vortex coronagraph (Conference Presentation)

O. Absil, M. Karlsson, D. Mawet, B. Carlomagno, V. Christiaens, D. Defrére, C. Delacroix, Julien H. Girard, C. G. Gonzalez, S. Habraken, P. Hinz, E. Huby, A. Jolivet, M. Kasper, H. Käufl, M. Kenworthy, K. Matthews, J. Milli, G. O. D. Xivry, E. Pantin, P. Piron, M. Reggiani, A. Riggs, E. Serabyn, J. Surdej, E. V. Catalán
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引用次数: 1

Abstract

Since its first light at the VLT in 2012, the Annular Groove Phase Mask (AGPM) has been used to implement vortex coronagraphy into AO-assisted infrared cameras at two additional world-leading observatories: the Keck Observatory and the LBT. In this paper, we review the status of these endeavors, and briefly highlight the main scientific results obtained so far. We explore the performance of the AGPM vortex coronagraph as a function of instrumental constraints, and identify the main limitations to the sensitivity to faint, off-axis companions in high-contrast imaging. These limitations include the AGPM itself, non-common path aberrations, as well as the data processing pipeline; we briefly describe our on-going efforts to further improve these various aspects. Based on the lessons learned from the first five years of on-sky exploitation of the AGPM, we are now preparing its implementation in a new generation of high-contrast imaging instruments. We detail the specificities of these instruments, and how they will enable the full potential of vortex coronagraphy to be unleashed in the future. In particular, we explain how the AGPM will be used to hunt for planets in the habitable zone of alpha Centauri A and B with a refurbished, AO-assisted version of the VISIR mid-infrared camera at the VLT (aka the NEAR project), and how this project paves the way towards mid-infrared coronagraphy on the ELT with the METIS instrument. We also discuss future LM-band applications of the AGPM with VLT/ERIS, ELT/METIS, and with a proposed upgrade of Keck/NIRC2, as well as future applications at shorter wavelengths, such as a possible upgrade of VLT/SPHERE with a K-band AGPM.
世界范围内:红外涡旋日冕仪的现状与展望(会议报告)
自2012年首次在VLT上使用以来,环形槽相位掩模(AGPM)已被用于在另外两个世界领先的天文台(凯克天文台和LBT)的ao辅助红外摄像机中实现涡旋日冕测量。本文综述了这些工作的现状,并简要介绍了迄今为止取得的主要科学成果。我们探讨了AGPM涡旋日冕仪的性能作为仪器约束的函数,并确定了高对比度成像中对微弱、离轴伴星灵敏度的主要限制。这些限制包括AGPM本身,非常见路径像差,以及数据处理管道;我们将简要介绍我们为进一步改善这些方面所做的持续努力。基于前五年AGPM在空中开发的经验教训,我们现在正准备在新一代高对比度成像仪器中实施它。我们详细介绍了这些仪器的特点,以及它们将如何使涡旋日冕学的全部潜力在未来得到释放。特别是,我们解释了AGPM将如何使用VLT(又名NEAR项目)上翻新的ao辅助版本的VISIR中红外相机在半人马座α A和B的可居住区域寻找行星,以及该项目如何为使用METIS仪器在ELT上进行中红外日冕成像铺平道路。我们还讨论了AGPM未来与VLT/ERIS、ELT/METIS以及Keck/NIRC2升级的lm波段应用,以及未来在更短波长的应用,例如用k波段AGPM升级VLT/SPHERE的可能性。
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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