E-ELT-HIRES possible design and capabilities E. Oliva (INAF-Firenze) B. Delabre (ESO) E. Oliva B. Delabre, ELT-HIRES, Cambridge1 o A very brief overview of what could be done within reasonable technological limits. o Fundamental approach: highly modular concept. o 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 scheme of instrument modules E. Oliva B. Delabre, ELT-HIRES, Cambridge2 o 4 Independent fiber-fed spectrometer modules optimized over 4 spectral ranges (UB, VI, YH, K). o Different observing modes are obtained using different/independent groups of fibers feeding each spectrometer. o 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 observing modes E. Oliva B. Delabre, ELT-HIRES, Cambridge3 ModeR (x10 3 ) -sampl (pix) D-Fib# FibExtra infos HR1004 (O) 2.7 (IR) 0.8” 2 + -cal x6 slicing MR MOS1433 (O) 22 (IR) 1.0”10 no slicing HR 2 IFU (IR) 0.005”80 IFU 0.02” x 0.1” Other possibilities HHR1303 (O) 2 (IR) 0.6” 2 + -cal x8 slicing HHHR2002 (O) 0.8” 1 + -cal x12 slicing MR MOS2028 (O) 15 (IR) 0.7”14 no slicing MR MOS3516 (O) 9 (IR) 0.4”25 no slicing HR 2 MOS (IR) 0.03”80 MCAO d~1’ fov

E-ELT-HIRES possible observing modes E. Oliva B. Delabre, ELT-HIRES, Cambridge4 o MR-MOS mode for all modules/wavelengths. o Possibility of parallel modes, e.g. MR-MOS in optical while observing a red object with HR in IR. o HR 2 IFU/MOS only in IR where AO correction works. o Patrol field of MR-MOS mode: depends on where its fibers positioner is located.

E-ELT-HIRES possible scheme of instrument modules E. Oliva B. Delabre, ELT-HIRES, Cambridge5

E-ELT-HIRES possible scheme of one spec-module E. Oliva B. Delabre, ELT-HIRES, Cambridge6 o HR mode has fixed optics  stability OK

E-ELT-HIRES possible slit illumination & observing modes E. Oliva B. Delabre, ELT-HIRES, Cambridge7

E-ELT-HIRES spectral format Slit too long for full spectral coverage with 1 channel E. Oliva B. Delabre, ELT-HIRES, Cambridge8

E-ELT-HIRES spectral format E. Oliva B. Delabre, ELT-HIRES, Cambridge9 H  m orders J  m orders Y  m orders

E-ELT fundamental scaling laws E. Oliva B. Delabre, ELT-HIRES, Cambridge10 MR-MOS with full spectral coverage  (too) many detectors

E-ELT fundamental scaling laws E. Oliva B. Delabre, ELT-HIRES, Cambridge11 Seeing limited spectroscopy  challenging optics cannot get longer slits in one spec-module cannot fit more fibers/slices in one spec-module