EDP Sciences
Free access
Volume 444, Number 2, December III 2005
Page(s) 635 - 641
Section Instruments, observational techniques, and data processing
DOI http://dx.doi.org/10.1051/0004-6361:20052636

A&A 444, 635-641 (2005)
DOI: 10.1051/0004-6361:20052636

Simulating the phase fluctuations produced by many stars in the weak atmospheric turbulence limit

V. V. Voitsekhovich1, D. Kouznetsov2 and V. G. Orlov1

1  Instituto de Astronomia, UNAM. AP 70-264 Cd. Universitaria, 04510 Mexico D.F., Mexico
    e-mail: voisteko@astroscu.unam.mx
2  Mathematics Building, University of Arizona, USA

(Received 3 January 2005 / Accepted 21 June 2005)

We propose a method allowing for a simulation of cross-correlated turbulence-induced phase fluctuations produced by many stars is proposed. It turns out that for weak-turbulence conditions which are important for many applications, it is possible to suggest a relatively simple and fast simulation procedure. Both the variation of Cn2 along a propagation path and an effect of finite outer scale of the turbulence are considered. The validity of the simulation is verified by comparing theoretical and simulated results, and it is shown that there is good agreement takes place even for big separations between the observation points. Adaptive optics, guide stars, speckle interferometry, long-base interferometry, imaging through the turbulence, as well as simulations of the image distortions of extended objects are among the possible applications of this method.

Key words: instumentation: adaptive optics -- atmospheric effects -- methods: numerical -- telescopes

© ESO 2005