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

Glenn, Jason, Bradford, C. Matt, Amini, Rashied, Moore, Bradley, Benson, Andrew, Armus, Lee, Katherine, Alatalo, Darling, Jeremy, Day, Peter, Domber, Jeanete, Farrah, Duncan, Fyhrie, Adalyn, Hensley, Brandon, Lipscy, Sarah, Redding, David, Rogers, Michael, Shannon, Mark, Steeves, John, Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918, Wu, Gordon and Zmuidzinas, Jonas 2018. The Galaxy Evolution Probe: a concept for a mid and far-infrared space observatory. Presented at: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, USA, 10-15 June 2018. Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave. , vol.10698 SPIE, 106980L. 10.1117/12.2314076

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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....

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
Last Modified:	27 Apr 2023 12:45
URI:	https://orca.cardiff.ac.uk/id/eprint/156723

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