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Exoearth study with TMT

Dekany, Richard (2004) Exoearth study with TMT. In: Second Bäckaskog Workshop on Extremely Large Telescopes. Proceedings of SPIE. No.5382. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 12-20. ISBN 9780819452993. http://resolver.caltech.edu/CaltechAUTHORS:20180724-160427827

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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.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.566101DOIArticle
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.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:20180724-160427827
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180724-160427827
Official Citation:Richard G. Dekany, "Exoearth study with TMT", Proc. SPIE 5382, Second Backaskog Workshop on Extremely Large Telescopes, (7 July 2004); doi: 10.1117/12.566101; https://doi.org/10.1117/12.566101
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88223
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Jul 2018 14:40
Last Modified:25 Jul 2018 14:40

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