End-to-end numerical modeling of the Roman Space Telescope coronagraph

Abstract

The Roman Space Telescope will have the first advanced coronagraph in space, with deformable mirrors for wavefront control, low-order wavefront sensing and maintenance, and a photon-counting detector. It is expected to be able to detect and characterize mature, giant exoplanets in reflected visible light. Over the past decade the performance of the coronagraph in its flight environment has been simulated with increasingly detailed diffraction and structural/thermal finite element modeling. With the instrument now being integrated in preparation for launch within the next few years, the present state of the end-to-end modeling is described, including the measured flight components such as deformable mirrors. The coronagraphic modes are thoroughly described, including characteristics most readily derived from modeling. The methods for diffraction propagation, wavefront control, and structural and thermal finite-element modeling are detailed. The techniques and procedures developed for the instrument will serve as a foundation for future coronagraphic missions such as the Habitable Worlds Observatory.

arXiv comment113 pages, 85 figures, to be published in SPIE Journal of Astronomical Telescopes, Instruments, and Systems

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Cited by in corpus (13)

• JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO${}_2$ in the HR 8799 and 51 Eri Exoplanets' Atmospheres
• The Analytical Performance Model and Error Budget for the Roman Coronagraph Instrument
• High-order wavefront sensing and control for the Roman Coronagraph Instrument (CGI): architecture and measured performance
• The Roman coronagraph community participation program: observation planning
• Flight masks of the Roman Space Telescope Coronagraph Instrument
• ESCAPE project: investigating active observing strategies and post-processing methods for exoplanet high-contrast imaging with future space missions
• Modeling and performance analysis of Implicit Electric Field Conjugation with two deformable mirrors applied to the Roman Coronagraph
• The Nancy Grace Roman Space Telescope Coronagraph Community Participation Program
• Coronagraphic Data Post-processing Using Projections on Instrumental Modes
• Extended Linearity in the High-Order Wavefront Sensor for the Roman Coronagraph
• Imaging exoplanets below the telescope stability limit
• ESCAPE project. CAPyBARA: a Roman Coronagraph simulator for post-processing methods development
• CoronaGraph Instrument Reference stars for Exoplanets (CorGI-REx) I. Preliminary Vetting and Implications for the Roman Coronagraph and Habitable Worlds Observatory