Query : 2005A&A...441.1217B

2005A&A...441.1217B - Astronomy and Astrophysics, volume 441, 1217-1228 (2005/10-3)

Faraday rotation measure synthesis.


Abstract (from CDS):

We extend the rotation measure work of Burn (1966MNRAS.133...67B) to the cases of limited sampling of λ2 space and non-constant emission spectra. We introduce the rotation measure transfer function (RMTF), which is an excellent predictor of nπ ambiguity problems with the λ2 coverage. Rotation measure synthesis can be implemented very efficiently on modern computers. Because the analysis is easily applied to wide fields, one can conduct very fast RM surveys of weak spatially extended sources. Difficult situations, for example multiple sources along the line of sight, are easily detected and transparently handled. Under certain conditions, it is even possible to recover the emission as a function of Faraday depth within a single cloud of ionized gas. Rotation measure synthesis has already been successful in discovering widespread, weak, polarized emission associated with the Perseus cluster (de Bruyn & Brentjens, 2005A&A...441..931D). In simple, high signal to noise situations it is as good as traditional linear fits to χ versus λ2 plots. However, when the situation is more complex or very weak polarized emission at high rotation measures is expected, it is the only viable option.

Abstract Copyright:

Journal keyword(s): methods: data analysis - techniques: polarimetric - magnetic fields - polarization - ISM: magnetic fields - Cosmology: large-scale structure of Universe

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 1 SNR 05 34 30.9 +22 00 53           ~ 6056 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5136 0

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