A method for nuclear-component deconvolution in active galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Methods: Data Analysis, Techniques: Image Processing, Galaxies: Active, Galaxies: Nuclei, Galaxies: Photometry

Scientific paper

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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