Open AccessSeparation of foregrounds from cosmic microwave background observations with the MAP satellite
Author(s) -
Jones A. W.,
Hobson M. P.,
Lasenby A. N.
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.1365-8711.1999.02467.x
Subject(s) - cosmic microwave background , physics , astrophysics , galaxy , astronomy , cosmic infrared background , spectral density , satellite , cosmic background radiation , anisotropy , optics , statistics , mathematics
Simulated observations of a 10 × 10 deg 2 field by the Microwave Anisotropy Probe (MAP) are analysed in order to separate cosmic microwave background (CMB) emission from foreground contaminants and instrumental noise and thereby determine how accurately the CMB emission can be recovered. The simulations include emission from the CMB, 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, even in the presence of these contaminating foregrounds, the CMB map is reconstructed with an rms accuracy of about 20 μK per 12.6‐arcmin pixel, which represents a substantial improvement as compared to the individual temperature sensitivities of the raw data channels. We also find, for the single 10 × 10 deg 2 field, that the CMB power spectrum is accurately recovered for ℓ≤ 600.