nro telescopes david spergel. history 2 2.4 meter telescopes + 1 2.4 meter mirror “residual space...
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NRO TelescopesDavid Spergel
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History
•2 2.4 meter telescopes + 1 2.4 meter mirror
• “Residual space hardware” from Future Imagery Architecture, failed program cancelled in 2005
•Been in storage ~10 years
•NASA HQ learned of their availability about 18 months ago.
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Looking forward: Astronomy in 2020
• LSST is about to succeed DES and HSC
• Three 20-40 meter class telescopes are close to first light
• LIGO is regularly detected neutron star mergers
• JWST, EVLA and ALMA are now successful “workhorse instruments”
• HST is near its “end of life”
• Euclid is scheduled for launch
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Looking backward: Key Results of the
Last Decade•96% of the universe is in the form of dark matter and dark energy
•Extrasolar planets are ubiquitous and show a remarkable diversity of properties
•Significant progress in understanding planet, star and galaxy formation but many gaps in our understanding
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NWNH and WFIRST• NWNH recognized that the development of large
format IR detectors enabled a new class of mission that could address several science goals simultaneously:
• dark energy
• “equally important outcome will be to open an new frontier of exoplanet studies...This census, combined with that made by the Kepler mission will determine how common Earth-like planets are over a wide range of parameters”
• “WFIRST will survey large areas of sky to address a broad rage of Astro2010 science questions ranging from understanding the assembly of galaxies to the structure of the Milky Way.”
• “GI program”
• WFIrst will also ffer a GI program
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WFIRST STDT Report
•Two mission concepts:
•DRM1: 1.3 m off-axis telescope with 0.375 sq deg fov launched on an Atlas V with a 5 year mission and a cost of 1.6 B
•DRM2: 1.1 m off-axis telescope with 0.585 sq deg fov launched on a Falcon 9 with a 3 year mission at a cost of slightly less than 1 B.
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Political Context•Between JWST and the core program,
NASA astronomy budget has almost no “free energy” over the next 5 years. More broadly, NASA’s science budget is not able to match our ambitions for Mars and other important goals.
•National politics: 2012 election will likely lead to changes regardless of outcome. Taxamagedon lurks at the end of the year!
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Questions• NRO telescope at WFIRST: Faster? Better? Cheaper?
• What can we do without modifying the telescope?
• Funding possibilities?
• What are the costs and benefits of a coronagraph (or occulter)? Can this be a precursor for TPF?
• What are potential uses of the second telescope? What steps should be taken in this decade to use this in the next decade? Should we use it?
• GOAL: To have a public meeting to start community discussion and inform the upcoming STDT
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More immediate questions
•Coffee?
•Bathrooms?
•Lunch? Dinner?
•Wifi: puvisitor
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Thanks to Keren, Mindy and Susan for organizational
work!