Download - Science case for Extremely Large Telescopes
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Science case for Extremely Large Telescopes
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Isobel Hook - April 2003
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 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)
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Isobel Hook - April 2003
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
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Isobel Hook - April 2003
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
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Isobel Hook - April 2003
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.
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Isobel Hook - April 2003
Science case subject areas
• Stars & Planets• Stars & Galaxies• Galaxies and cosmology