Exoearth study with TMT
- Creators
- Dekany, Richard
- Others:
- Ardeberg, Arne L.
- Andersen, Torben
Abstract
Ground-based optical and infrared telescopes with diameters of 30-meters or greater have theoretical potential to study objects at the contrast levels predicted for reflecting terrestrial planets in orbits within the habitable zone of nearby stars. Despite the corrupting effect of the Earth's turbulent atmosphere, the theoretical limits can be approached through the use of an adaptive optics (AO) system optimized for high contrast operating at near-infrared wavelength. With proper flow-down of functional requirements and contrast-optimized choice of site, the highly segmented. Thirty Meter Telescope (TMT) could study scores of nearby star systems, to apparent magnitude 5, for resident terrestrial planets at spectral resolution R = 5 in either visible or near-infrared band, and a few systems to magnitude 3, at R = 20 in the infrared. Even at low spectral resolution, a wealth of information could be obtained by direct imaging of exoearths, including determination of the presence of an atmosphere, clouds, equilibrium temperature, tidal locking, and the presence of non-Earth-like atmospheric chemistry such as steam lines. Our own atmosphere, however, limits the study of exoearth biological markers, unless these planets have environmental conditions and chemical composition significantly different from our own.
Additional Information
© 2004 Society of Photo-optical Instrumentation Engineers (SPIE). This work has been supported by the Gordon and Betty Moore Foundation in support of the California Extremely Large Telescope (CELT) point design of the TMT. The author wishes to express thanks to Karl Stapelfeldt, Bruce Macintosh, and Wes Traub for many helpful discussions.Attached Files
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Additional details
- Eprint ID
- 88223
- Resolver ID
- CaltechAUTHORS:20180724-160427827
- Gordon and Betty Moore Foundation
- Created
-
2018-07-25Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Thirty Meter Telescope
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 5382