Basic Ideas for Very Large Aperture Telescopes the case for continuing groundbased astronomy

9/1/98


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Table of Contents

Basic Ideas for Very Large Aperture Telescopes the case for continuing groundbased astronomy

Basic Ideas for Very Large Aperture Telescopes the case for continuing groundbased astronomy

What is the case for a new groundbased facility?

Framework for a Science Case

Challenging 8m - 10m telescopes - Imaging Spectroscopy of the majority of objects in the HDF

“Deconstructing High z Galaxies”

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“Deconstructing the M16 Pillars with Gemini”

Going beyond Gemini

Lets be presumptuous….

How we will be competitive from the ground

Sensitivity gains for a 21st Century telescope

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The gains of NGST compared to a groundbased 8m telescope

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“its resolution stupid..”

“its resolution stupid..”

“its collecting area stupid..”

“its collecting area stupid..”

Modeled characteristics of 20m and 50m telescope

Relative Signal to Noise Gain of groundbased 20m and 50m telescopes compared to NGST -- assuming a detected S/N of 10 for NGST on a point source, with 4x1000s integration

Relative Signal to Noise Gain of groundbased 20m and 50m telescopes compared to NGST -- assuming a detected S/N of 10 for NGST on a point source, with 4x1000s integration

“its sensitivity and resolution ..”

50m Point Source Sensitivities 10 s 10,000s

50m Point Source Sensitivities 10 s 10,000s

Adaptive Optics will be essential

AO performance on a 50m Telescope

AO performance on a 50m Telescope

The Challenge - Multiple Laser Beacons

Adaptive Optics will be essential

Imaging of the Universe at High Redshift with 10 milli-arcsecond resolution

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Observation scale lengths

Spectroscopic Imaging at 10 milli-arcsecond resolution

Telescopes can still be competitive from the ground

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50 Meter Telescope Concept

50 m Design Performance

Technology and “cost-benefit” challenges

“What can it cost?”

Basic Ideas for Very Large Aperture Telescopes the case for continuing groundbased astronomy

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The next step ?

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One advantage of being in space

Author: Matt Mountain