Multi-frequency Wiener filtering of CMB data with polarisation

Details Multi-frequency Wiener filtering of CMB data with polarisation Multi-frequency Wiener filtering of CMB data with polarisation

1998-09-28

arxiv.org/abs/astro-ph/9809353v1

Astronomy and Astrophysics

Astrophysics

13 pages, 12 figures, uses mn.sty, accepted in MNRAS

Scientific paper

One goal of CMB data analysis is to combine data at different frequencies, angular resolutions, and noise levels in order to best extract the component with a Plankian spectral behaviour. A multi-frequency Wiener filtering method has been proposed in this context by Bouchet, Gispert and Puget (1995) and in parallel by Tegmark and Efstathiou (1996). As shown in Bouchet and Gispert (1998a), this linear method is also convenient to estimate a priori, given a sky model and an experimental description, the residual errors on the CMB power spectrum assuming the foregrounds have been removed with this method. In this paper, we extend the method to the case when additional polarisation data is available. In particular, we derive the errors on the power spectra involving polarisation and show numerical results for the specifications of the future CMB space missions MAP and \plancks \footnote{For current noise specifications and angular and frequency coverage of these experiments, see http://map.gsfc.nasa.gov and http://astro.estec.esa.nl/SA-general/Projects/Planck} when it is assumed that the Galactic synchrotron and dust emission are respectively about 40% and 10 % polarised. We consider two underlying models for our study: we take a standard CDM model with $\tau = 0.1$ for the extraction of $E$-mode polarisation and $ET$ cross-correlation ; for $B$-mode polarisation we consider a tilted CDM model with $n_s = 0.9, n_T = -0.1$ and $T/S = 0.7$.

Affiliated with

Also associated with

No associations

Rating

Multi-frequency Wiener filtering of CMB data with polarisation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Multi-frequency Wiener filtering of CMB data with polarisation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-frequency Wiener filtering of CMB data with polarisation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-481644