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ATLAS probe for the study of galaxy evolution with 300,000,000 galaxy spectra

Content, Robert and Wang, Yun and Hillenbrand, Lynne and Kirkpatrick, J. Davy and Chary, Ranga and Helou, George (2018) ATLAS probe for the study of galaxy evolution with 300,000,000 galaxy spectra. 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. 106980I. ISBN 9781510619494.

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ATLAS (Astrophysics Telescope for Large Area Spectroscopy) Probe is a mission concept for a NASA probe-class space mission with primary science goal the definitive study of galaxy evolution through the capture of 300,000,000 galaxy spectra up to z=7. It is made of a 1.5-m Ritchey-Chretien telescope with a field of view of solid angle 0.4 deg^2. The wavelength range is at least 1 μm to 4 μm with a goal of 0.9 μm to 5 μm. Average resolution is 600 but with a possible trade-off to get 1000 at the longer wavelengths. The ATLAS Probe instrument is made of 4 identical spectrographs each using a Digital Micro-mirror Device (DMD) as a multi-object mask. It builds on the work done for the ESA SPACE and Phase-A EUCLID projects. Three-mirror fore-optics re-image each sub-field on its DMD which has 2048 x 1080 mirrors 13.6 μm wide with 2 possible tilts, one sending light to the spectrograph, the other to a light dump. The ATLAS Probe spectrographs use prisms as dispersive elements because of their higher and more uniform transmission, their larger bandwidth, and the ability to control the resolution slope with the choice of glasses. Each spectrograph has 2 cameras. While the collimator is made of 4 mirrors, each camera is made of only one mirror which reduces the total number of optics. All mirrors are aspheric but with a relatively small P-V with respect to their best fit sphere making them easily manufacturable. For imaging, a simple mirror to replace the prism is not an option because the aberrations are globally corrected by the collimator and camera together which gives large aberrations when the mirror is inserted. An achromatic grism is used instead. There are many variations of the design that permit very different packaging of the optics. ATLAS Probe will enable ground-breaking science in all areas of astrophysics. It will (1) revolutionize galaxy evolution studies by tracing the relation between galaxies and dark matter from the local group to cosmic voids and filaments, from the epoch of reionization through the peak era of galaxy assembly; (2) open a new window into the dark universe by mapping the dark matter filaments to unveil the nature of the dark Universe using 3D weak lensing with spectroscopic redshifts, and obtaining definitive measurements of dark energy and modification of gravity using cosmic large-scale structure; (3) probe the Milky Way's dust-shrouded regions, reaching the far side of our Galaxy; and (4) characterize asteroids and other objects in the outer solar systems.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Kirkpatrick, J. Davy0000-0003-4269-260X
Chary, Ranga0000-0001-7583-0621
Helou, George0000-0003-3367-3415
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
Group:Infrared Processing and Analysis Center (IPAC), Astronomy Department
Subject Keywords:Space telescope, NIR spectroscopy, Digital Micro-mirror Devices, prism spectroscopy, Multi-Object Spectroscopy
Series Name:Proceedings of SPIE
Issue or Number:10698
Record Number:CaltechAUTHORS:20191009-090203213
Persistent URL:
Official Citation:Robert Content, Yun Wang, Massimo Roberto, Mark Dickinson, Henry Ferguson, Lynne Hillenbrand, Wesley Fraser, Peter Behroozi, Jarle Brinchmann, Andrea Cimatti, Emanuele Daddi, Christopher Hirata, Michael Hudson, J. Davy Kirkpatrick, Robert Barkhouser, James Bartlett, Robert Benjamin, Ranga Chary, Charlie Conroy, Megan Donahue, Olivier Doré, Peter Eisenhardt, Karl Glazebrook, George Helou, Sangeeta Malhotra, Lauro Moscardini, Zoran Ninkov, Alvaro Orsi, Michael Ressler, James Rhoads, Jason Rhodes, Alice Shapley, and Stephen Smee "ATLAS probe for the study of galaxy evolution with 300,000,000 galaxy spectra", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106980I (22 August 2018);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99178
Deposited By: Tony Diaz
Deposited On:09 Oct 2019 16:14
Last Modified:16 Nov 2021 17:44

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