Open AccessForeground separation methods for satellite observations of the cosmic microwave background
Author(s) -
Hobson M. P.,
Jones A. W.,
Lasenby A. N.,
Bouchet F. R.
Publication year - 1998
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.1365-8711.1998.01777.x
Subject(s) - cosmic microwave background , physics , planck , satellite , astrophysics , astronomy , cosmic background radiation , galaxy , cosmic cancer database , microwave , sunyaev–zel'dovich effect , peculiar velocity , galaxy cluster , optics , anisotropy , redshift , quantum mechanics
A maximum entropy method (MEM) is presented for separating the emission resulting from different foreground components from simulated satellite observations of the cosmic microwave background radiation (CMBR). In particular, the method is applied to simulated observations by the proposed Planck Surveyor satellite. The simulations, performed by Bouchet &38; Gispert, include emission from the CMBR and the kinetic and thermal Sunyaev–Zel'dovich (SZ) effects from galaxy clusters, as well as Galactic dust, free–free and synchrotron emission. We find that the MEM technique performs well and produces faithful reconstructions of the main input components. The method is also compared with traditional Wiener filtering and is shown to produce consistently better results, particularly in the recovery of the thermal SZ effect.