Halo Characteristics and Their Influence on Companion Searches at the Starfire Optical Range
Applied Optics, Vol. 37, Issue 30, pp. 7035-7043 (1998)
http://dx.doi.org/10.1364/AO.37.007035
Acrobat PDF (239 KB)
Abstract
To image extrasolar planets at their large contrast, high-resolution adaptive optics (AO) is needed to correct atmospheric seeing. The 1.5-m AO system at the Starfire Optical Range was used to confirm theoretical models. Halo levels were reduced by a factor of 4, on average, from 0.5 to 3.0 arc sec radius, which when combined with the increased Strehl ratio improved the gain by a factor of 80. Speckle lifetimes ranged from 5 to 30 ms at 0.3 arc sec, which is much longer than the 0.6-ms AO update time. These results show good agreement with predictions for current technology and reveal no limitations, in principle, to the detection of planets by use of AO systems with higher speeds and resolutions.
© 1998 Optical Society of America
[Optical Society of America ]
OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7060) Atmospheric and oceanic optics : Turbulence
(110.6770) Imaging systems : Telescopes
(350.1260) Other areas of optics : Astronomical optics
Citation
Patrick T. Ryan, Robert Q. Fugate, J. Roger P. Angel, Donald W. McCarthy, Subu Mohanty, and Donald G. Sandler, "Halo Characteristics and Their Influence on Companion Searches at the Starfire Optical Range," Appl. Opt. 37, 7035-7043 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-30-7035
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