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Anisoplanicity studies within NGC6871

Marshall, Jason A. and Troy, Mitchell and Dekany, Richard and Dekens, Frank G. (2000) Anisoplanicity studies within NGC6871. In: Adaptive Optical Systems Technology. Proceedings of SPIE. No.4007. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 151-158. ISBN 9780819436320. http://resolver.caltech.edu/CaltechAUTHORS:20190118-090019919

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Abstract

Images corrected with adaptive optics benefit from an increase in the amount of flux contained within the diffraction-limited core. The degree of this correction is measured by the Strehl ratio, equal to the ratio of the maximum observed intensity to the maximum theoretical intensity. Natural guide star adaptive optics systems are limited by the need for a guide star of adequate magnitude within suitable proximity to the science target. Thus, the above-described benefit can only be obtained for objects over a fraction of the total sky. Two nights of imaging the central region of the open star cluster NGC6871 with the Palomar Adaptive Optics System has supplied measurements of the Strehl ratio for numerous stars within the field. These measurements were used to calculate K band isoplanatic angles of 39 arcseconds (UT 1999 May 31) and 50 arcseconds (UT 1999 August 1). These isoplanatic angles are compared to those derived from Kolmogorov atmospheric theory, and their implications for adaptive optics systems are discussed.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.390376DOIArticle
Additional Information:© 2000 Society of Photo-optical Instrumentation Engineers (SPIE). The work presented in this paper was carried out as part of the Summer Undergraduate Research Fellowship program at the California Institute of Technology, to whom our gratitude is extended.
Funders:
Funding AgencyGrant Number
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:Adaptive optics, atmospheric turbulence, anisoplanicity
Record Number:CaltechAUTHORS:20190118-090019919
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190118-090019919
Official Citation:Jason A. Marshall, Mitchell Troy, Richard G. Dekany, Frank G. Dekens, "Anisoplanicity studies within NGC6871," Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390376
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92364
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Jan 2019 17:54
Last Modified:18 Jan 2019 17:54

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