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Proceedings Paper

HabEx Lite: a starshade-only habitable exoplanet imager alternative
Author(s): David Redding; Keith Coste; Otto Polanco; Claudia Pineda; Kevin Hurd; Howard Tseng; Jose Quezada; Stefan Martin; Joel Nissen; Kevin Schulz; Jonathan Tesch; Eric Cady; Michael Rodgers; Matthew East; James Mooney; Chris Stark
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Paper 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.

Paper Details

Date Published: 6 July 2018
PDF: 13 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106980X (6 July 2018); doi: 10.1117/12.2310058
Show Author Affiliations
David Redding, Jet Propulsion Lab. (United States)
Keith Coste, Jet Propulsion Lab. (United States)
Otto Polanco, Jet Propulsion Lab. (United States)
Claudia Pineda, Jet Propulsion Lab. (United States)
Kevin Hurd, Jet Propulsion Lab. (United States)
Howard Tseng, Jet Propulsion Lab. (United States)
Jose Quezada, Jet Propulsion Lab. (United States)
Stefan Martin, Jet Propulsion Lab. (United States)
Joel Nissen, Jet Propulsion Lab. (United States)
Kevin Schulz, Jet Propulsion Lab. (United States)
Jonathan Tesch, Jet Propulsion Lab. (United States)
Eric Cady, Jet Propulsion Lab. (United States)
Michael Rodgers, Synopsys, Inc. (United States)
Matthew East, Harris Corp. (United States)
James Mooney, Harris Corp. (United States)
Chris Stark, Space Telescope Science Institute (United States)

Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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