Hot dust in the active nucleus of NGC 7469 probed by adaptive optics
Abstract. The use of adaptive optics has allowed to reach in the infrared an angular resolution around 0.35â, allowing to study the temperature, mass and ...
Hot dust in the active nucleus of NGC 7469 probed by adaptive optics observations? O. Marco1 and D. Alloin2 1 2
Observatoire de Paris, DESPA (URA CNRS 264), F-92195 Meudon, France Service d’Astrophysique, CE Saclay (URA CNRS 2052), F-91191 Gif-sur-Yvette, France
Received 8 July 1997 / Accepted 27 March 1998
Abstract. The use of adaptive optics has allowed to reach in the infrared an angular resolution around 0.35”, allowing to study the temperature, mass and distribution of the dust component within the 400 pc radius central region of NGC 7469. We have obtained L and L’ band images which show an unresolved core (r
1997); a structured molecular/dusty environment around the central engine of NGC 1068 detected at infrared, milli- metric and radio wavelengths (Gallimore et al ...
galaxies: nuclei â infrared: galaxies â galaxies: active â instru- mentation: adaptive optics. 1. Introduction. Series of observational facts assembled over the past ...
The near-infrared range from 1â2.5 m was covered Elongation. In this paper, 1994 observations in the 2-m in 1994 and 1995 in the methane atmospheric ...
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To get the best image quality from an optical system in terms of contrast, it is required to deconvolve the image from the point spread function (PSF). For this ...
Myopic deconvolution of adaptive optics images by use of object and point-spread function power spectra. Jean-Marc Conan, Laurent M. Mugnier, Thierry Fusco ...
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images must be deconvolved to restore the fine details of the object. ... restoration with a good photometric precision because of the inevitable noise in the im-.
ABSTRACT. The paper presents a spatio-color classification in a chrominance- luminance space related to the dichromatic model. The unsu- pervised adaptive ...
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as the best candidate to approach directly the AGN geometry. Advances in high ... a hand on the dust/molecular torus location and contribute to probe the.
images by use of object and point-spread function power spectra,â Appl. Opt. 37, ... In Section 4, we derive a marginal estimator and show its performance on ...
The method takes into account the three-dimensional nature of the imaging process; ... For these two reasons, a deconvolution of the recorded images is necessary. ... For a system with N images of N object planes, this 3D convolution can be ...
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