Foreground separation methods for satellite observations of the cosmic microwave background

Details Foreground separation methods for satellite observations of the cosmic microwave background Foreground separation methods for satellite observations of the cosmic microwave background

1998-06-30

arxiv.org/abs/astro-ph/9806387v1

Astronomy and Astrophysics

Astrophysics

31 pages, 19 figures (bitmapped), accpeted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.1998.01777.x

A maximum entropy method (MEM) is presented for separating the emission due to 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 and Gispert (1998), include emission from the CMBR, 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.

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