Faraday rotation measure synthesis
By M. Brentjens, A. Bruyn. 2005
547 citations recorded by the source corpus.
We extend the rotation measure work of Burn ( 1966, MNRAS, 133, 67) to the cases of limited sampling of lambda(2) space and non-constant emission spectra. We introduce the rotation measure transfer function (RMTF), which is an excellent predictor of n pi ambiguity problems with the lambda(2) 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 2005, A&A, 441, 931). In simple, high signal to noise situations it is as good as traditional linear fits to chi versus lambda(2) 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.
Subfields: Instrumentation, Ocean Engineering, Spectroscopy
View Paper: https://www.semanticscholar.org/paper/9f6472320416cc7e64dc2f5ba764dd96080f7d4a
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In Instrumentation
- C. Baugh
- M. Liguori
- J. Fergusson
- Martin Kunz
- L. Staveley-Smith
- Juan García-Bellido
- Dustin Lang
- Mubdi Rahman
In Spectroscopy
Citations in the corpus
- COrE (Cosmic Origins Explorer) A White Paper (2011, background): “An inverse Fourier transformation can therefore reveal the polarization per unit Faraday depth [167].”
- Nine New Repeating Fast Radio Burst Sources from CHIME/FRB (2020, methodology): “, searches for an RM detection using the RM-tools package6 that implements two independent methods: RM-synthesis (Burn 1966; Brentjens & de Bruyn 2005) and Stokes QU-fitting (O’Sullivan et al. 2012).”
- Estimating extragalactic Faraday rotation (2014, methodology): “This relation is based on linear Gaussian error propagation from the observations of the individual Stokes parameters to a polarization angle and to the slope of a straight line fit to the polarization angle as a function of λ 2 , as shown by Brentjens & de Bruyn (2005) in their Appendix A.”
- An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment (2022, methodology): “CHIME will map the northern sky in polarization, and we will apply the Faraday synthesis technique (Brentjens & de Bruyn 2005) to obtain three-dimensional information about magnetized interstellar structures in the Galaxy.”
- CHIME/FRB Discovery of Eight New Repeating Fast Radio Burst Sources (2019, methodology): “RM-tools3, a package that implements Rotation Measure Synthesis (Burn 1966; Brentjens & de Bruyn 2005), was used for the initial rotation measure detection.”
- Science with ASKAP (2008, methodology): “The following estimates of instrumental requirements are based on approximations given in Brentjen and de Bruyn [39].”