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The Galaxy Evolution Probe: a concept for a mid and far-infrared space observatory
Author(s): Jason Glenn; C. Matt Bradford; Rashied Amini; Bradley Moore; Andrew Benson; Lee Armus; Katherine Alatalo; Jeremy Darling; Peter Day; Jeanette Domber; Duncan Farrah; Adalyn Fyhrie; Brandon Hensley; Sarah Lipscy; David Redding; Michael Rogers; Mark Shannon; John Steeves; Carole Tucker; Gordon Wu; Jonas Zmuidzinas
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Paper Abstract

The Galaxy Evolution Probe (GEP) is a concept for a mid and far-infrared space observatory designed to survey sky for star-forming galaxies from redshifts of z = 0 to beyond z = 4. Furthering our knowledge of galaxy formation requires uniform surveys of star-forming galaxies over a large range of redshifts and environments to accurately describe star formation, supermassive black hole growth, and interactions between these processes in galaxies. The GEP design includes a 2 m diameter SiC telescope actively cooled to 4 K and two instruments: (1) An imager to detect star-forming galaxies and measure their redshifts photometrically using emission features of polycyclic aromatic hydrocarbons. It will cover wavelengths from 10 to 400 μm, with 23 spectral resolution R = 8 filter-defined bands from 10 to 95 μm and five R = 3.5 bands from 95 to 400 μm. (2) A 24 – 193 μm, R = 200 dispersive spectrometer for redshift confirmation, identification of active galactic nuclei, and interstellar astrophysics using atomic fine-structure lines. The GEP will observe from a Sun-Earth L2 orbit, with a design lifetime of four years, devoted first to galaxy surveys with the imager and second to follow-up spectroscopy. The focal planes of the imager and the spectrometer will utilize KIDs, with the spectrometer comprised of four slit-coupled diffraction gratings feeding the KIDs. Cooling for the telescope, optics, and KID amplifiers will be provided by solar-powered cryocoolers, with a multi-stage adiabatic demagnetization refrigerator providing 100 mK cooling for the KIDs.

Paper Details

Date Published: 24 July 2018
PDF: 16 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106980L (24 July 2018); doi: 10.1117/12.2314076
Show Author Affiliations
Jason Glenn, Univ. of Colorado Boulder (United States)
C. Matt Bradford, Jet Propulsion Lab. (United States)
Rashied Amini, Jet Propulsion Lab. (United States)
Bradley Moore, Jet Propulsion Lab. (United States)
Andrew Benson, Observatories of the Carnegie Institution for Science (United States)
Lee Armus, IPAC (United States)
Katherine Alatalo, Space Telescope Science Institute (United States)
Jeremy Darling, Univ. of Colorado Boulder (United States)
Peter Day, Jet Propulsion Lab. (United States)
Jeanette Domber, Ball Aerospace (United States)
Duncan Farrah, Virginia Polytechnic Institute and State Univ. (United States)
Adalyn Fyhrie, Univ. of Colorado Boulder (United States)
Brandon Hensley, Jet Propulsion Lab. (United States)
Sarah Lipscy, Ball Aerospace (United States)
David Redding, Jet Propulsion Lab. (United States)
Michael Rogers, Jet Propulsion Lab. (United States)
Synopsys, Inc. (United States)
Mark Shannon, Ball Aerospace (United States)
John Steeves, Jet Propulsion Lab. (United States)
Carole Tucker, Cardiff Univ. (United Kingdom)
Gordon Wu, Ball Aerospace (United States)
Jonas Zmuidzinas, Jet Propulsion Lab. (United States)
Caltech (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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