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| Paper: |
Far-Ultraviolet Integral Field and High-Resolution Spectrographs for Exoplanets and Solar System Bodies |
| Monograph: |
11, HWO25 Proceedings Part II: Mission Framework, Technology, and Broader Contributions |
| Page: |
279 |
| Authors: |
Shingo Kameda, Go Murakami, Umi Enokidani, Masaki Kuwabara, Atsushi Yamazaki, Akifumi Nakayama, Kevin France, Brian Fleming, and Takashi Sukegawa |
| DOI: |
10.26624/OFNS6635 |
| Abstract: |
Far-ultraviolet (FUV; ∼100–200 nm) spectroscopy is a powerful diagnostic tool for studying planetary and exoplanetary atmospheres, as well as plumes on icy moons and related phenomena. Here, we present the design and scientific objectives of two instruments currently under study at JAXA for the Habitable Worlds Observatory (HWO): an Integral Field Spectrograph (IFS) and a High-Resolution Spectrograph (HRS). The IFS (R ∼4,500–8,400; 94–174 nm; angular resolution ∼0.04” ; FoV 3.2” × 3.2”) enables spatially resolved mapping of extended sources such as water plumes on icy moons, planetary exospheres, and cometary comae. The HRS (R ∼120,000; 100–170 nm) is optimized for point sources, allowing precise transit spectroscopy of exoplanetary atmospheres. The instrument design takes advantage of recent advances in key enabling technologies—including large-format tapered MCP detectors, high-efficiency gratings, image slicers, and advanced FUV coatings. |
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