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Galaxy Evolution Probe: a concept for a mid and far-infrared space observatory

Glenn, Jason and Bradford, C. Matt and Amini, Rashied and Moore, Bradley and Benson, Andrew and Armus, Lee and Alatalo, Katey and Darling, Jeremy and Day, Peter and Domber, Jeanette and Farrah, Duncan and Fyhrie, Adalyn and Hensley, Brandon and Lipscy, Sarah and Redding, David and Rogers, Michael and Shannon, Mark and Steeves, John and Tucker, Carol and Wu, Gordon and Zmuidzinas, Jonas (2018) Galaxy Evolution Probe: a concept for a mid and far-infrared space observatory. In: Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave. Proceedings of SPIE. No.10698. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 106980L. ISBN 9781510619494.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Glenn, Jason0000-0001-7527-2017
Bradford, C. Matt0000-0001-5261-7094
Benson, Andrew0000-0001-5501-6008
Armus, Lee0000-0003-3498-2973
Alatalo, Katey0000-0002-4261-2326
Darling, Jeremy0000-0003-2511-2060
Farrah, Duncan0000-0003-1748-2010
Hensley, Brandon0000-0001-7449-4638
Additional Information:© 2018 Society of Photo-optical Instrumentation Engineers (SPIE). The authors gratefully acknowledge NASA award number NNX17AJ89G in support of this work. The authors also gratefully acknowledge discussions with Phil Appleton, Steve Eales, Matt Griffin, GSFC (regarding the ADR), Bill Purcell, and important early work by Anita Sengupta. The research described in this paper was partially carried out at the Jet Propulsion Laboratory, a part of the California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC), Astronomy Department
Funding AgencyGrant Number
Subject Keywords:Galaxy Evolution Probe, space observatory, star-forming galaxies, mid infrared, far infrared, polycyclic aromatic hydrocarbons, kinetic inductance detectors
Series Name:Proceedings of SPIE
Issue or Number:10698
Record Number:CaltechAUTHORS:20181207-080115375
Persistent URL:
Official Citation: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, "The Galaxy Evolution Probe: a concept for a mid and far-infrared space observatory," Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106980L (24 July 2018); doi: 10.1117/12.2314076.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91542
Deposited By: Tony Diaz
Deposited On:07 Dec 2018 16:28
Last Modified:16 Nov 2021 03:42

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