Open AccessA method for nuclear‐component deconvolution in active galaxies
Author(s) -
Sánchez Portal Miguel
Publication year - 1999
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1999.02944.x
Subject(s) - physics , deconvolution , bulge , galaxy , astrophysics , point spread function , convolution (computer science) , component (thermodynamics) , subtraction , residual , algorithm , artificial intelligence , optics , thermodynamics , arithmetic , mathematics , artificial neural network , computer science
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.