A method for nuclear-component deconvolution in active galaxies |
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| Authors: | Miguel Sánchez Portal |
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| Institution: | Dpto. de Física Teórica, C-XI, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain; LAEFF/INTA, ESA Villafranca del Castillo Satellite Tracking Station, PO Box 50727, 28080 Madrid, Spain |
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| Abstract: | A new method for deconvolution of the nuclear component of active galaxies is presented, along with some initial results with several nuclear-type objects. Unlike the majority of procedures currently in use, this method is based on the following steps: (a) derivation of seeing-free bulge and disc parameters, (b) construction of a two-dimensional model of the galaxy, (c) derivation of a point-spread function (PSF) from star profiles and convolution of the bulge+disc model with the obtained PSF and (d) extraction of the seeing-convolved model radial profile and subtraction from the observed one. The residual gives the nuclear component. Only standard image processing packages are used. |
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| Keywords: | methods: data analysis techniques: image processing galaxies: active galaxies: nuclei galaxies: photometry |
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