future of astronomy
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Future of Astronomy. Astronomy 315 Professor Lee Carkner Lecture 25. The Future of Astronomy. What would we like to understand better? Formation of initial galaxies Properties and numbers of extrasolar planets Formation and evolution of black holes. Problems and Solutions. - PowerPoint PPT PresentationTRANSCRIPT
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Future of Astronomy
Astronomy 315Professor Lee
CarknerLecture 25
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The Future of Astronomy
What would we like to understand better? Formation of initial galaxies
Properties and numbers of extrasolar planets
Formation and evolution of black holes
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Problems and Solutions
We want to study fainter objects
We want better detail
We want to study a broad range of astrophysical phenomena Use multiwavelength telescopes
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Future Observatories
While much science is done with small and common instruments, there are several large and expensive new projects that we hope will lead to big breakthroughs
Webb Space Telescope A Giant Segmented Mirror Telescope
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Webb Space Telescope
Large infrared space observatory
Do the equivalent of Hubble Deep Fields over the entire sky
Both strong IR emitters Cost:
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Webb Format
Cheap means light (avoid shuttle launch or multiple launch)
Mirror size: 6.5 meters To get large mirror to fit in small launch
vehicle, mirror folds up
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Webb Consequences Two big issues with future astronomy
missions: Budgets are shrinking
“The telescope that ate astronomy”
One super mission that can achieve big
breakthroughs
Most future missions have been canceled
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Astro-H Will get a better name after successful
launch Designed to view “hard” (high energy)
X-rays Study hot diffuse gas
Other nations contributing (including US), but mostly a modest Japanese mission
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ATHENA Advanced Telescope for High
ENergy Astrophysics
Arises out of international collaboration failure of IXO
To be launched 2021?
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Telescope Properties The light gathering power of a telescope depends on its
areaArea = r2
The resolution of a telescope depends on its diameter (d) and the wavelength () of light observed
R = (1.22 ) / d Determines how close two objects can be and still be resolved
(smaller R is better)
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Future Ground Based Telescopes
Larger size means spectroscopy and imaging of fainter objects
Extremely Large Telescopes
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Current Plans
Planned to be operational in 2018
The ESO has plans for the European Extremely Large Telescope (E-ELT) of 42 meters Also planned for 2018
Each will cost about 1 billion dollars
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Extremely Large Telescopes
Success of large telescopes depends on adaptive optics
ELT’s would complement space telescopes For follow up observations that require greater
sensitivity
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Telescope Trends
Need to consider cost/benefit ratio
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Next Time
Meet in planetarium No homework or downloads