Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-06-13
Astronomy and Astrophysics
Astrophysics
35 pages, 11 figures. To appear in Astrophysical Journal June 20 2008
Scientific paper
10.1086/588034
We have studied the feasibility and scientific potential of zenith observing liquid mirror telescopes having 20 to 100 m diameters located on the moon. They would carry out deep infrared surveys to study the distant universe and follow up discoveries made with the 6 m James Webb Space Telescope (JWST), with more detailed images and spectroscopic studies. They could detect objects 100 times fainter than JWST, observing the first, high-red shift stars in the early universe and their assembly into galaxies. We explored the scientific opportunities, key technologies and optimum location of such telescopes. We have demonstrated critical technologies. For example, the primary mirror would necessitate a high-reflectivity liquid that does not evaporate in the lunar vacuum and remains liquid at less than 100K: We have made a crucial demonstration by successfully coating an ionic liquid that has negligible vapor pressure. We also successfully experimented with a liquid mirror spinning on a superconducting bearing, as will be needed for the cryogenic, vacuum environment of the telescope. We have investigated issues related to lunar locations, concluding that locations within a few km of a pole are ideal for deep sky cover and long integration times. We have located ridges and crater rims within 0.5 degrees of the North Pole that are illuminated for at least some sun angles during lunar winter, providing power and temperature control. We also have identified potential problems, like lunar dust. Issues raised by our preliminary study demand additional in-depth analyses. These issues must be fully examined as part of a scientific debate we hope to start with the present article.
Angel Roger
Borra Ermanno F.
Eisenstein Daniel J.
Foing Bernard
Hickson Paul
No associations
LandOfFree
A cryogenic liquid-mirror telescope on the moon to study the early universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A cryogenic liquid-mirror telescope on the moon to study the early universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A cryogenic liquid-mirror telescope on the moon to study the early universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-123339