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The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) Technology Demonstration

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arxiv 2103.01980 v1 pith:NETXLAEO submitted 2021-03-02 astro-ph.IM

N. Jeremy Kasdin , Vanessa P. Bailey , Bertrand Mennesson , Robert T. Zellem , Marie Ygouf , Jason Rhodes , Thomas Luchik , Feng Zhao
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A J Eldorado Riggs Young-Joon Seo John Krist Brian Kern Hong Tang Bijan Nemati Tyler D. Groff Neil Zimmerman Bruce Macintosh Margaret Turnbull John Debes Ewan S. Douglas Roxana E. Lupu
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classification astro-ph.IM
keywords instrumentimagingspacetechnologycoronagraphcriticaldemonstrationdirect
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The Coronagraph Instrument (CGI) on the Nancy Grace Roman Space Telescope will demonstrate the high-contrast technology necessary for visible-light exoplanet imaging and spectroscopy from space via direct imaging of Jupiter-size planets and debris disks. This in-space experience is a critical step toward future, larger missions targeted at direct imaging of Earth-like planets in the habitable zones of nearby stars. This paper presents an overview of the current instrument design and requirements, highlighting the critical hardware, algorithms, and operations being demonstrated. We also describe several exoplanet and circumstellar disk science cases enabled by these capabilities. A competitively selected Community Participation Program team will be an integral part of the technology demonstration and could perform additional CGI observations beyond the initial tech demo if the instrument performance warrants it.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Life after death: Europa in the evolving Habitable Zone of a Red Sun

    astro-ph.EP 2025-05 conditional novelty 6.0 of 10

    Europa's surface would sublimate asymmetrically in the red giant habitable zone, yet a water-vapor atmosphere could persist for at least 0.2 Gyr, and three observing strategies could reveal it.

  2. Jointly Modeling Roman Coronagraph Astrometry and Photometry Improves Orbital Parameter Estimates

    astro-ph.IM 2026-07 conditional novelty 4.0 of 10

    Adding phase-dependent reflected-light photometry to astrometry-based orbit fits improves inclination precision by 12% (SNR=3) to 33% (SNR=10) in simulated Roman CGI data.

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