E elt hires possible design and capabilities e oliva inaf firenze b delabre eso
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E-ELT-HIRES possible design and capabilities E. Oliva (INAF-Firenze) B. Delabre (ESO) - PowerPoint PPT Presentation


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A very brief overview of what could be done within reasonable technological limits. Fundamental approach: highly modular concept. Modules and observing modes may be added or removed following a trade-off study between scientific priorities and technical/cost constraints.

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E elt hires possible design and capabilities e oliva inaf firenze b delabre eso

  • A very brief overview of what could be done within reasonable technological limits.

  • Fundamental approach: highly modular concept.

  • Modules and observing modes may be added or removed following a trade-off study between scientific priorities and technical/cost constraints.

E-ELT-HIRES possible design and capabilitiesE. Oliva (INAF-Firenze) B. Delabre (ESO)

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires possible scheme of instrument modules

  • 4 Independent fiber-fed spectrometer modules optimized over 4 spectral ranges (UB, VI, YH, K).

  • Different observing modes are obtained using different/independent groups of fibers feeding each spectrometer.

  • Observing mode is selected in the pre-slit section (fore-optics) of each spectrometer.

    • HR mode has fixed optics  stability OK

E-ELT-HIRES possible scheme of instrument modules

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires possible observing modes

E-ELT-HIRES 4 spectral ranges (UB, VI, YH, K).possible observing modes

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires possible observing modes1

  • MR-MOS mode for all modules/wavelengths. 4 spectral ranges (UB, VI, YH, K).

  • Possibility of parallel modes, e.g. MR-MOS in optical while observing a red object with HRin IR.

  • HR2IFU/MOS only in IR where AO correction works.

  • Patrol field of MR-MOS mode: depends on where its fibers positioner is located.

E-ELT-HIRES possible observing modes

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires possible scheme of instrument modules1

E-ELT-HIRES 4 spectral ranges (UB, VI, YH, K).possible scheme of instrument modules

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires possible scheme of one spec module

E-ELT-HIRES possible scheme of one spec-module 4 spectral ranges (UB, VI, YH, K).

  • HR mode has fixed optics  stability OK

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires possible slit illumination observing modes

E-ELT-HIRES 4 spectral ranges (UB, VI, YH, K).possible slit illumination & observing modes

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires spectral format slit too long for full spectral coverage with 1 channel

E-ELT-HIRES 4 spectral ranges (UB, VI, YH, K).spectral format Slit too long for full spectral coverage with 1 channel

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt hires spectral format

E-ELT-HIRES 4 spectral ranges (UB, VI, YH, K).spectral format

H 1.45-1.81 mm

orders 74-93

J 1.16-1.38 mm

orders 99-119

Y 0.97-1.14 mm

orders 118-140

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt fundamental scaling laws

E-ELT fundamental scaling laws 4 spectral ranges (UB, VI, YH, K).

MR-MOS with full spectral coverage  (too) many detectors

E. Oliva B. Delabre, ELT-HIRES, Cambridge


E elt fundamental scaling laws1

E-ELT fundamental scaling laws 4 spectral ranges (UB, VI, YH, K).

  • Seeing limited spectroscopy challenging optics

    • cannot get longer slits in one spec-module

    • cannot fit more fibers/slices in one spec-module

E. Oliva B. Delabre, ELT-HIRES, Cambridge


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