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26 September 2013 A small space telescope to conduct a large spectroscopic survey of galaxies
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One of the key goals of NASA’s astrophysics program is to answer the question: How did galaxies evolve into the spirals and elliptical galaxies that we see today? We describe a mission concept called Galaxy Evolution Spectroscopic Explorer (GESE) to address this question by making a large spectroscopic survey of galaxies at redshift, z~1-2 (lookback times of 8-10 billion years). GESE is a 1.5-m space telescope with a 3-channel multi-object slit spectrograph that can obtain spectra of ~400 galaxies per exposure. Together, the 3 channels cover the spectral range, 0.2-1.6 μm at a resolving power, R~400. (This observed spectral range corresponds to 0.1-0.8 μm in the restframe of a galaxy at a redshift, z=1 galaxy.) The mission concept takes advantage of two new technological advances: (1) light-weighted, wide field of view telescope mirrors, and (2) the Digital Micromirror Device (DMD) to be used as a slit generator in a multichannel (UV, optical, NIR), multi-object slit spectrograph.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sara R. Heap, Qian Gong, Tony Hull, Jeffrey Kruk, Lloyd Purves, and Massimo Robberto "A small space telescope to conduct a large spectroscopic survey of galaxies", Proc. SPIE 8860, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VI, 88600D (26 September 2013);


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