Journal Article

Foreground separation methods for satellite observations of the cosmic microwave background

M. P. Hobson, A. W. Jones, A. N. Lasenby and F. R. Bouchet

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 300, issue 1, pages 1-29
Published in print October 1998 | ISSN: 0035-8711
Published online October 1998 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1046/j.1365-8711.1998.01777.x
Foreground separation methods for satellite observations of the cosmic microwave background

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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 & 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.

Keywords: methods: data analysis; techniques: image processing; cosmic microwave background

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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