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Proceedings Paper

SmallSat interferometry for THz astrophysics
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Paper Abstract

While great strides have been made in far-infrared astrophysics with the NASA Spitzer and ESA Herschel missions, subarcsecond spatial resolution from space is still beyond the reach of current technologies. The Atacama Large Millimeter Array has produced stunning images from the ground of planetary systems in the process of formation but cannot observe the key molecules of water or O2, due to the presence of Earth’s atmosphere. The concept presented here will enable interferometric imaging with sub-arcsecond resolution of water and other key far infrared molecular species from space at a cost far lower than the flagship class interferometric missions previously proposed (i.e. ESA’s ESPRIT). We present a concept for a far infrared interferometer based on a constellation of CubeSat antenna elements with a central ESPA-class correlator satellite optimized for the imaging of water in protoplanetary systems. Such a mission would produce groundbreaking images of newly forming planetary systems in a key astrophysical and astrobiological tracer, the 557 GHz ground state line of water. By leveraging recent developments in CubeSat technology, inflatable reflectors, miniaturized receiver systems and low power CMOS digital electronics, such a mission could be implemented at an Explorer level budget. In addition to the proposed astrophysics application, the developments proposed here could also find application in planetary science (FIR spectroscopy of comets and small bodies) and Earth observing (high resolution imaging of Earth from geostationary orbit).

Paper Details

Date Published: 16 July 2018
PDF: 6 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 1069832 (16 July 2018); doi: 10.1117/12.2312822
Show Author Affiliations
Christopher E. Groppi, Arizona State Univ. (United States)
Paul Goldsmith, NASA Jet Propulsion Lab. (United States)
Philip Mauskopf, Arizona State Univ. (United States)
Jose Siles, NASA Jet Propulsion Lab. (United States)
Jonathan Hoh, Arizona State Univ. (United States)
Jeremy Whitton, Arizona State Univ. (United States)
Gena Pilyavsky, Arizona State Univ. (United States)
Christopher Walker, The Univ. of Arizona, Steward Observatory (United States)
Adrian Tang, NASA Jet Propulsion Lab. (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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