Keck Observatory in the TMT Era Keck Strategic

Keck Observatory in the TMT Era Keck Strategic Planning meeting September 18, 2009

TMT has selected 13 N at Mauna Kea • MK process • CMP subplans need to be completed • Final EIS submitted and accepted • CDUA application prepared and submitted • CDUP issued • Legal issues resolved • Schedule, with legal challenge periods included and optimistically assuming success has CDUP issued in October 2010

TMT Early-Light capabilities • MOBI: 0. 32µ - 1µ, R=1000, 3000, 8000 (0. 7 slit width), 40 arcmin 2 LRIS-like with added cross -dispersed higher-R mode

NFIRAOS • TMT AO system is designed to deliver rms wavefront error of 190 nm and to pass a 2 -arcminute (diameter) field, with good correction over 30 -arcsecond (diameter) field. • Performance is comparable to NGAO

TMT First Decade Instrument/Capability Suite Instrument Near-IR DL Spectrometer & Imager (IRIS) Spectral Resolution ~4000 Wide-field Optical Spectrometer (WFOS) 1000 -5000 Multi-slit near-DL near-IR Spectrometer (IRMS) 2000 - 5000 Mid-IR Echelle Spectrometer & Imager (MIRES) 5000 - 100000 Ex. AO I (PFI) 50 - 300 High Resolution Optical Spectrograph (HROS) 30000 - 50000 MCAO imager (WIRC) 5 - 100 Near-IR, DL Echelle (NIRES) 5000 - 30000 Science Case Assembly of galaxies at large redshift Black holes/AGN/Galactic Center Resolved stellar populations in crowded fields Astrometry IGM structure and composition 2<z<6 High-quality spectra of z>1. 5 galaxies suitable for measuring stellar pops, chemistry, energetics Near-field cosmology Near-IR spectroscopic diagnostics of the faintest objects JWST follow-up Physical structure and kinematics of protostellar envelopes Physical diagnostics of circumstellar/protoplanetary disks: where and when planets form during the accretion phase Direct detection and spectroscopic characterization of extra-solar planets Stellar abundance studies throughout the Local Group ISM abundances/kinematics, IGM characterization to z~6 Extra-solar planets! Precision astrometry Stellar populations to 10 Mpc Precision radial velocities of M-stars and detection of low-mass planets 5 IGM characterizations for z>5. 5

IRIS - Infrared imaging spectrometer IRIS is OSIRIS-like. Works at diffraction limit, multiple plate scales imager filter wheels WFS IFUs F/15 AO Focus IRIS dewar (at 77 k) 2’ Grating imager Common spectrograph and camera for both IFUs

IRMS - Infrared multislit spectrometer 0. 8 - 2. 5 um cryogenic multi-slit spectrometer 2. 3 arcmin field of view 0. 06 arcsec sampling 46 moveable slits 2. 4” long Covers entire Y, J, H or K band at R = 4660

TMT Schedule • Current first-light date with NFIRAOS, MOBIE, IRMS and IRIS is Fall 2018 • This is based on a resourced schedule and some assumptions about completing the partnership and feeding funding to the project. • Not likely to be delivered any earlier than this • Commissioning will be carried out over irst two years (only part of the time will be available for science)

Keck in the TMT Era • Complementary capabilities – – Wider-field MOS High-R at all wavelengths Visible-light AO Natural complementarity set by source brightness • Feeder capabilities • Complementary uses – Concentrate on larger programs – Concentrate on specialized instruments