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HabEx Lite: a Starshade-only Habitable Exoplanet Imager Alternative

Show simple item record Redding, David Coste, Keith Polanco, Otto Rodgers, Michael Pineda, Claudia Hurd, Kevin Tseng, Howard Quezada, Jose Martin, Stefan Nissen, Joel Schulz, Kevin Tesch, Jonathan Cady, Eric East, Matthew Mooney, James Stark, Chris 2020-05-14T22:53:52Z 2020-05-14T22:53:52Z 2018-06-12
dc.identifier.citation SPIE Astronomical Telescopes + Instrumentation, Austin, Texas, June 12 - 14, 2018 en_US
dc.identifier.clearanceno 18-3240
dc.description.abstract The HabEx mission concept is intended to directly image planetary systems around nearby stars, and to perform a wide range of general astrophysics and solar system observations. Its main goal is the discovery and characterization of Earthlike exoplanets through high-contrast imaging and spectroscopy. The baseline HabEx concept would use both a coronagraph and a starshade for exoplanet science. We describe an alternative, “HabEx Lite” concept, which would use a starshade (only) for exoplanet science. The benefit is lower cost: by deleting the complex coronagraph instrument; by lowering observatory mass; by relaxing tolerances and stability requirements; by permitting use of a compact on-axis telescope design; by use of a smaller launch vehicle. The scientific penalty of this lower cost option is a smaller number of detected exoplanets of all types, including exoEarth candidates, and a smaller fraction of exoplanets with measured orbits. Our approach uses a non-deployed segmented primary mirror, whose manufacture is within current capabilities. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.title HabEx Lite: a Starshade-only Habitable Exoplanet Imager Alternative en_US
dc.type Preprint en_US

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