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Liger at W. M. Keck Observatory: Overall Design and Science Drivers

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dc.contributor.author Wright, Shelley A
dc.contributor.author Jones, Tucker
dc.contributor.author Larkin, James
dc.contributor.author Kupke, Renate
dc.contributor.author Kassis, Marc
dc.contributor.author Brown, Aaron
dc.contributor.author Andersen, David
dc.contributor.author Armus, Lee
dc.contributor.author Cale, Bryson
dc.contributor.author Cosens, Maren
dc.contributor.author Chu, Devin
dc.contributor.author Do, Tuan
dc.contributor.author Fassanacht, Chris
dc.contributor.author Fisher, Deanne
dc.contributor.author Fitzgerald, Michael
dc.contributor.author Ghez, Andrea
dc.contributor.author Greene, Jenny
dc.contributor.author Hayashi, Takeru
dc.contributor.author Hees, Aurelien
dc.contributor.author Hirtenstein, Jessie
dc.contributor.author Johnson, Chris
dc.contributor.author Keane, Jacqueline
dc.contributor.author Kelly, Patrick
dc.contributor.author Kirbyo, Evan
dc.contributor.author Karalidi, Theodora
dc.contributor.author Konopackya, Quinn
dc.contributor.author Kress, Evan
dc.contributor.author Lu, Jessica
dc.contributor.author Lyke, Jim
dc.contributor.author Magnone, Kenneth
dc.contributor.author Maire, Jerome
dc.contributor.author McGurk, Rosalie
dc.contributor.author Medling, Anne
dc.contributor.author Millar-Blanchaer, Maxwell
dc.contributor.author Minor, Quinn
dc.contributor.author Nash, Reston
dc.contributor.author Nierenberg, Anna
dc.contributor.author Reddy, Naveen
dc.contributor.author Rich, Michael
dc.contributor.author Ruffio, Jean-Baptiste
dc.contributor.author Rundquist, Nils-Erik
dc.contributor.author Sabhlok, Sanchit
dc.contributor.author Sand, David
dc.contributor.author Sanders, Ryan
dc.contributor.author Sandstrom, Karin
dc.contributor.author Shapley, Alice
dc.contributor.author Sohn, Ji-Man
dc.contributor.author Surya, Arun
dc.contributor.author Treu, Tommaso
dc.contributor.author Wang, Eric
dc.contributor.author Warad, Kanaka
dc.contributor.author Weber, Robert
dc.contributor.author Wiley, James
dc.contributor.author Wizinowich, Peter
dc.contributor.author Wong, Michael H.
dc.contributor.author Yeh, Sherry
dc.date.accessioned 2024-10-22T06:00:01Z
dc.date.available 2024-10-22T06:00:01Z
dc.date.issued 2024-06
dc.identifier.citation Proceedings of the SPIE, Vol. E Vol. 13096, pp.130960G 38 en_US
dc.identifier.issn 0277-786X
dc.identifier.uri http://hdl.handle.net/2248/8549
dc.description Restricted Access en_US
dc.description.abstract Liger is a next-generation near-infrared (0.81 - 2.45 µm) integral field spectrograph (IFS) and imaging camera for the W. M. Keck Observatory (WMKO) adaptive optics (AO) system. The instrument concept originated by coupling designs from WMKO AO instruments and the future Thirty Meter Telescope IRIS spectrograph. Liger is designed for the Keck I telescope to operate behind the upcoming Keck All-sky Precision Adaptive optics (KAPA) system. The imaging camera sequentially feeds an IFS that makes use of slicer assembly for the coarsest sampling (75 mas and 150 mas per spaxel) and lenslet array (14 mas and 31 mas per spaxel) for diffraction-limited sampling. The imaging camera makes use of off-axis parabolas and a Hawaii-2RG detector to achieve a 14 mas/pixel plate scale and 20.5”×20.5” field of view. The IFS offers a range of spectral resolving power of R=4,000 – 10,000 and yields large fields of view for an AO-fed IFS. Liger will enable new science by providing enhanced capabilities, including higher spectral resolving power, access to shorter wavelengths, and larger fields of view than any current or planned ground- or space-based IFS system. Liger will be able to unlock previously inaccessible science across a wide range of the cosmos, such as dark matter substructure, supermassive black holes, the Galactic Center, exoplanet atmospheres, and the time-variable Solar System. We present the overall design of the Liger subsystems and review unique science drivers. en_US
dc.language.iso en en_US
dc.publisher SPIE - Society of Photo-Optical Instrumentation Engineers en_US
dc.relation.uri https://doi.org/10.1117/12.3020803
dc.rights © 2024 SPIE
dc.subject Near-infrared en_US
dc.subject Integral Field en_US
dc.subject Spectrograph en_US
dc.subject Imager en_US
dc.subject Cryogenic en_US
dc.subject Adaptive Optics en_US
dc.subject Spectroscopy en_US
dc.subject Astrometry en_US
dc.subject Photometry en_US
dc.title Liger at W. M. Keck Observatory: Overall Design and Science Drivers en_US
dc.type Article en_US


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