28 June 2006 ELTs adaptive optics for multi-objects 3D spectroscopy: key parameters and design rules
Author Affiliations +
Abstract
In the last few years, new Adaptive Optics [AO] techniques have emerged to answer new astronomical challenges: Ground-Layer AO [GLAO] and Multi-Conjugate AO [MCAO] to access a wider Field of View [FoV], Multi-Object AO [MOAO] for the simultaneous observation of several faint galaxies, eXtreme AO [XAO] for the detection of faint companions. In this paper, we focus our study to one of these applications : high red-shift galaxy observations using MOAO techniques in the framework of Extremely Large Telescopes [ELTs]. We present the high-level specifications of a dedicated instrument. We choose to describe the scientific requirements with the following criteria : 40% of Ensquared Energy [EE] in H band (1.65μm) and in an aperture size from 25 to 150 mas. Considering these specifications we investigate different AO solutions thanks to Fourier based simulations. Sky Coverage [SC] is computed for Natural and Laser Guide Stars [NGS, LGS] systems. We show that specifications are met for NGS-based systems at the cost of an extremely low SC. For the LGS approach, the option of low order correction with a faint NGS is discussed. We demonstrate that, this last solution allows the scientific requirements to be met together with a quasi full SC.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
B. Neichel, J.-M. Conan, T. Fusco, E. Gendron, M. Puech, G. Rousset, F. Hammer, "ELTs adaptive optics for multi-objects 3D spectroscopy: key parameters and design rules", Proc. SPIE 6272, Advances in Adaptive Optics II, 62721X (28 June 2006); doi: 10.1117/12.671415; https://doi.org/10.1117/12.671415
PROCEEDINGS
13 PAGES


SHARE
RELATED CONTENT

From Euro50 toward a European ELT
Proceedings of SPIE (June 23 2006)
Scientific requirements for a European ELT
Proceedings of SPIE (June 23 2006)
Wide field adaptive optics upper limit performances
Proceedings of SPIE (July 07 2004)
Science with Euro50
Proceedings of SPIE (December 16 2002)

Back to Top