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Aspera: the UV SmallSat telescope to detect and map the warm-hot gas phase in nearby galaxy halos

Chung, Haeun and Vargas, Carlos J. and Hamden, Erika T. and McMahon, Thomas and Gonzales, Kerry L. and Khan, Aafaque R. and Agarwal, Simran and Bailey, Hop and Behroozi, Peter and Brendel, Trenton and Choi, Heejoo and Connors, Tom and Corlies, Lauren and Corliss, Jason and Dettmar, Ralf-Jürgen and Dolana, David and Douglas, Ewan S. and Guzman, John and Hamara, Dave and Harris, Walt and Harshman, Karl and Hergenrother, Carl and Hoadley, Keri and Kidd, John and Kim, Dae Wook and Li, Jessica S. and Montoya, Manny and Sauve, Corwynn and Schiminovich, David and Selznick, Sanford and Siegmund, Oswald and Ward, Michael and Wolcott, Ellie M. and Zaritsky, Dennis (2021) Aspera: the UV SmallSat telescope to detect and map the warm-hot gas phase in nearby galaxy halos. In: UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts X. Proceedings of SPIE. No.11819. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 1181903.

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Aspera is an extreme-UV (EUV) Astrophysics small satellite telescope designed to map the warm-hot phase coronal gas around nearby galaxy halos. Theory suggests that this gas is a significant fraction of a galaxy’s halo mass and plays a critical role in its evolution, but its exact role is poorly understood. Aspera observes this warm-hot phase gas via Ovi emission at 1032 °A using four parallel Rowland-Circle-like spectrograph channels in a single payload. Aspera’s robust-and-simple design is inspired by the FUSE spectrograph, but with smaller, four 6.2 cm × 3.7 cm, off-axis parabolic primary mirrors. Aspera is expected to achieve a sensitivity of 4.3×10⁻¹⁹ erg/s/cm²/arcsec² for diffuse Ovi line emission. This superb sensitivity is enabled by technological advancements over the last decade in UV coatings, gratings, and detectors. Here we present the overall payload design of the Aspera telescope and its expected performance. Aspera is funded by the inaugural 2020 NASA Astrophysics Pioneers program, with a projected launch in late 2024.

Item Type:Book Section
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URLURL TypeDescription
Douglas, Ewan S.0000-0002-0813-4308
Hoadley, Keri0000-0002-8636-3309
Additional Information:© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE). This work is funded by NASA grant number 80NSSC21M0117 to the University of Arizona. This work is also supported by the University of Arizona’s College of Science, Office of Research, Innovation, and Impact (ORII), the University of Arizona Space Institute (UASI), and the Department of Astronomy and Steward Observatory. Portions of this work were supported by the Arizona Board of Regents Technology Research Initiative Fund (TRIF). Keri Hoadley acknowledges support by the David & Ellen Lee Postdoctoral Fellowship in Experiment Physics at Caltech.
Funding AgencyGrant Number
University of ArizonaUNSPECIFIED
Steward ObservatoryUNSPECIFIED
Arizona Board of RegentsUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Subject Keywords:UV, Spectrograph, Ovi Emission, NASA Astrophysics Pioneers, Circumgalactic Medium, Small Satellite, Space Telescope, Micro-Channel Plate
Series Name:Proceedings of SPIE
Issue or Number:11819
Record Number:CaltechAUTHORS:20220617-287783000
Persistent URL:
Official Citation:Haeun Chung, Carlos J. Vargas, Erika Hamden, Tom McMahon, Kerry Gonzales, Aafaque R. Khan, Simran Agarwal, Hop Bailey, Peter Behroozi, Trenton Brendel, Heejoo Choi, Tom Connors, Lauren Corlies, Jason Corliss, Ralf-Jürgen Dettmar, David Dolana, Ewan S. Douglas, John Guzman, Dave Hamara, Walt Harris, Karl Harshman, Carl Hergenrother, Keri Hoadley, John Kidd, Daewook Kim, Jessica S. Li, Manny Montoya, Corwynn Sauve, David Schiminovich, Sanford Selznick, Oswald Siegmund, Michael Ward, Ellie M. Wolcott, and Dennis Zaritsky "Aspera: the UV SmallSat telescope to detect and map the warm-hot gas phase in nearby galaxy halos", Proc. SPIE 11819, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts X, 1181903 (20 August 2021);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115202
Deposited By: Tony Diaz
Deposited On:17 Jun 2022 20:23
Last Modified:17 Jun 2022 20:23

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