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Science case for Extremely Large Telescopes

Science case for Extremely Large Telescopes. ELT science case – Development. Leiden case assumed 100m OWL Now need to define science priorities Then define hard requirements on: Telescope size FOV Wavelength range of operation Shortest l for AO, Longest wavelength – submm?

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Science case for Extremely Large Telescopes

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  1. Science case for Extremely Large Telescopes

  2. ELT science case – Development • Leiden case assumed 100m OWL • Now need to define science priorities • Then define hard requirements on: • Telescope size • FOV • Wavelength range of operation • Shortest l for AO, Longest wavelength – submm? • Telescope site (which hemisphere?) • Highest contrast required (e.g. for planet detection) • Are there critical points among these parameters which enable key science? • How does ELT compare with other facilities? (JWST, ALMA)

  3. Then.. • Consider science that can be done with this facility • e.g., Leiden 2001 science case • Took 100m (“OWL”) as starting point • Lists science projects that can be done • But include more.. • Quantitative calculations • Clear statements of assumptions

  4. ELT science case – Design requirements • For design study we need • List of science priorities • List of hard constraints • Quantitative assessment of requirements • Assumptions must be clear • A table of requirements by science project, e.g. elt_req3 • Then tradeoffs can be made

  5. ELT science case timeline • April 2003 • OPTICON I3 proposal sent in (includes science case funding) • Oxford meeting • July 2003 • Draft FP6 design study proposal • Outline of essential science objectives • Plan for assessing main criteria (telescope size etc) • October 2003 • FP6 design study bid deadline • End 2005 • Draft set of top level requirements and priorities, possibly presented as a function of telescope diameter • End 2006 • Consolidated set of top level requirements (outcome of the I3) • = the basis of a fast-track preliminary design.

  6. Science case subject areas • Stars & Planets • Stars & Galaxies • Galaxies and cosmology

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