Advancing European High-Contrast Imaging R&D Towards the Habitable Worlds Observatory

Abstract

The Habitable Worlds Observatory (HWO) will enable a transformative leap in the direct imaging and characterization of Earth-like exoplanets. For this, NASA is focusing on early investment in technology development prior to mission definition and actively seeking international partnerships earlier than for previous missions. The "R&D for Space-Based HCI in Europe" workshop, held in March 2024 at Paris Observatory, convened leading experts in high-contrast imaging (HCI) to discuss European expertise and explore potential strategies for European contributions to HWO. This paper synthesizes the discussions and outcomes of the workshop, highlighting Europe's critical contributions to past and current HCI efforts, the synergies between ground- and space-based technologies, and the importance of laboratory testbeds and collaborative funding mechanisms. Key conclusions include the need for Europe to invest in technology development for areas such as deformable mirrors and advanced detectors, and establish or enhance laboratory facilities for system-level testing. Putting emphasis on the urgency of aligning with the timeline of the HWO, the participants called on an open affirmation by the European Space Agency (ESA) that a European contribution to HWO is clearly anticipated, to signal national agencies and unlock funding opportunities at the national level. Based on the expertise demonstrated through R&D, Europe is poised to play a pivotal role in advancing global HCI capabilities, contributing to the characterization of temperate exoplanets and fostering innovation across domains.

Accepted for publication in Astrophysics and Space Science

References in corpus (9)

• Fundamental limitations of high contrast imaging set by small sample statistics
• Theoretical Limits on Extrasolar Terrestrial Planet Detection with Coronagraphs
• Discovery of a Companion Candidate in the HD169142 Transition Disk and the Possibility of Multiple Planet Formation
• Speckle noise and dynamic range in coronagraphic images
• An Enigmatic Pointlike Feature within the HD 169142 Transitional Disk
• Lyot-based Low Order Wavefront Sensor for Phase-mask Coronagraphs: Principle, Simulations and Laboratory Experiments
• Optical vortex coronagraphs on ground-based telescopes
• L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam
• Optimizing the subwavelength grating of L-band Annular Groove Phase Masks for high coronagraphic performance

Cited by in corpus (6)

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• Focal plane wavefront control with model-based reinforcement learning
• Active rejection-enhancement of spectrally adaptive liquid crystal geometric phase vortex coronagraphs