Table 1.
Overview of a selection of current and future instruments that might be most promising for detecting IGM filaments.
| Name | Wavelength range | Redshift range | Field of view | Resolution | |
|---|---|---|---|---|---|
| λ (Å) | zLyα | R | |||
| Current IFU instrumentation | |||||
| KCWI-Blue (Keck) | 3500–5600 | 1.9–3.6 | 20 × 33 arcsec2 | 1000–20 000 | |
| MUSE (VLT) | 4650–9300 | 2.8–6.7 | 1 × 1 arcmin2 | 1770–3590 | |
| KMOS (VLT) | 8000–25 000 | 5.6–19.6 | 65 × 43 arcsec | 2000–4200 | |
| OSIRIS (Keck) | 10 000–24 500 | 7.2–19.1 | 4.8 × 6.4 arcsec2 | 2000–4000 | |
| SINFONI (VLT) | 11 000–24 500 | 8.0–19.1 | 8 × 8 arcsec2 | 2000–4000 | |
| Upcoming IFU instrumentation | |||||
| KCRM (KCWI-Red, Keck) | 5300–10 500 | 3.4–7.6 | 20 × 33 arcsec2 | 1000–20 000 | |
| HARMONI (ELT) | 4700–24 500 | 2.9–19.1 | 6.4 × 9.1 arcsec2 | 3000–20 000 | |
| BlueMUSE (VLT) | 3500–6000 | 1.9–3.9 | 1.4 × 1.4 arcmin2 | ∼3000–5000 | |
| Upcoming and/or proposed space missions | |||||
| SPHEREx ( * ) | 7500–50 000 | 5.2–40.1 | 3.5 × 11.3 deg2 | 41–130 | |
| MESSIER ( * ) | ∼2000–7000 | ∼0.5–4 | 2 × 2 deg2 | ... | |
| WSO-UV | 1150–3200 | ∼0–1.5 | 70 × 75 arcsec2 | ∼500 | |
Notes. Fields left blank indicate currently unknown or undecided values. All current instruments presented are IFU spectrographs, upcoming and/or proposed instruments include several IFU spectrographs and space telescopes (two UV satellites and one IR spectrophotometer). Future experiments are in the development stage, unless marked with an asterisk.
( * )Proposed space missions.
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