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Solar Phys (2012) 276:451477 DOI 10.1007/s11207-011-9882-7

Summary: Solar Phys (2012) 276:451477
DOI 10.1007/s11207-011-9882-7
Large Field-of-View Spectropolarimetric Observations
with a Large Aperture Telescope
G. Molodij G. Aulanier
Received: 15 October 2010 / Accepted: 15 October 2011 / Published online: 25 November 2011
Springer Science+Business Media B.V. 2011
Abstract In the context of the increasing interest in large-aperture telescopes dedicated
to the Sun, we present a study to evaluate the adaptive-optics system limitations on the
requirements expected for magnetic-field extrapolations and data-driven MHD simulations
of active regions. The questions we address include: What is the size of the field of view
at high spatial resolution for a four-meter class telescope with a spectrograph? What is the
impact of the selected spectral domain on the performance in relation to the aforementioned
scientific goals? We show that the visible-wavelength domain remains difficult to explore
with ground-based telescopes using classical adaptive optics systems. The field of view
obtained will be only a few arcseconds at the diffraction limit for most of the time. We review
alternative configurations of adaptive-optics systems for different telescope apertures and
wavelength domains which could be considered for practical implementation in derivations
of the magnetic field from polarimetric observations.
1. Introduction


Source: Aulanier, Guillaume - Observatoire de Paris


Collections: Physics