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Proceedings Paper

The LUVOIR Ultraviolet Multi-Object Spectrograph (LUMOS): instrument definition and design
Author(s): Kevin France; Brian Fleming; Garrett West; Stephan R. McCandliss; Matthew R. Bolcar; Walter Harris; Leonidas Moustakas; John M. O'Meara; Ilaria Pascucci; Jane Rigby; David Schiminovich; Jason Tumlinson
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Paper Abstract

The Large Ultraviolet/Optical/Infrared Surveyor (LUVOIR) is one of four large mission concepts currently undergoing community study for consideration by the 2020 Astronomy and Astrophysics Decadal Survey. LUVOIR is being designed to pursue an ambitious program of exoplanetary discovery and characterization, cosmic origins astrophysics, and planetary science. The LUVOIR study team is investigating two large telescope apertures (9- and 15-meter primary mirror diameters) and a host of science instruments to carry out the primary mission goals. Many of the exoplanet, cosmic origins, and planetary science goals of LUVOIR require high-throughput, imaging spectroscopy at ultraviolet (100 – 400 nm) wavelengths. The LUVOIR Ultraviolet Multi-Object Spectrograph, LUMOS, is being designed to support all of the UV science requirements of LUVOIR, from exoplanet host star characterization to tomography of circumgalactic halos to water plumes on outer solar system satellites. LUMOS offers point source and multi-object spectroscopy across the UV bandpass, with multiple resolution modes to support different science goals. The instrument will provide low (R = 8,000 – 18,000) and medium (R = 30,000 – 65,000) resolution modes across the far-ultraviolet (FUV: 100 – 200 nm) and nearultraviolet (NUV: 200 – 400 nm) windows, and a very low resolution mode (R = 500) for spectroscopic investigations of extremely faint objects in the FUV. Imaging spectroscopy will be accomplished over a 3 × 1.6 arcminute field-of-view by employing holographically-ruled diffraction gratings to control optical aberrations, microshutter arrays (MSA) built on the heritage of the Near Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope (JWST), advanced optical coatings for high-throughput in the FUV, and next generation large-format photon-counting detectors. The spectroscopic capabilities of LUMOS are augmented by an FUV imaging channel (100 – 200nm, 13 milliarcsecond angular resolution, 2 × 2 arcminute field-of-view) that will employ a complement of narrow- and medium-band filters. The instrument definition, design, and development are being carried out by an instrument study team led by the University of Colorado, Goddard Space Flight Center, and the LUVOIR Science and Technology Definition Team. LUMOS has recently completed a preliminary design in Goddard’s Instrument Design Laboratory and is being incorporated into the working LUVOIR mission concept. In this proceeding, we describe the instrument requirements for LUMOS, the instrument design, and technology development recommendations to support the hardware required for LUMOS. We present an overview of LUMOS’ observing modes and estimated performance curves for effective area, spectral resolution, and imaging performance. Example “LUMOS 100-hour Highlights” observing programs are presented to demonstrate the potential power of LUVOIR’s ultraviolet spectroscopic capabilities.

Paper Details

Date Published: 29 August 2017
PDF: 22 pages
Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 1039713 (29 August 2017); doi: 10.1117/12.2272025
Show Author Affiliations
Kevin France, Univ. of Colorado Boulder (United States)
Brian Fleming, Univ. of Colorado Boulder (United States)
Garrett West, NASA Goddard Space Flight Ctr. (United States)
Stephan R. McCandliss, Johns Hopkins Univ. (United States)
Matthew R. Bolcar, NASA Goddard Space Flight Ctr. (United States)
Walter Harris, The Univ. of Arizona (United States)
Leonidas Moustakas, Jet Propulsion Lab. (United States)
John M. O'Meara, Saint Michael's College (United States)
Ilaria Pascucci, The Univ. of Arizona (United States)
Jane Rigby, NASA Goddard Space Flight Ctr. (United States)
David Schiminovich, Columbia Univ. (United States)
Jason Tumlinson, Space Telescope Science Institute (United States)

Published in SPIE Proceedings Vol. 10397:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX
Oswald H. Siegmund, Editor(s)

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