The Coma cluster magnetic field from Faraday Rotation Measures

Details The Coma cluster magnetic field from Faraday Rotation Measures The Coma cluster magnetic field from Faraday Rotation Measures

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..36..303b&link_type=abstract

Magnetic Fields in the Universe II: From Laboratory and Stars to the Primordial Universe - Supplementary CD (Eds. A. Esquivel, J

Astronomy and Astrophysics

Astronomy

Galaxies: Clusters: General, Galaxies: Clusters: Individual (Coma-A1656), Large-Scale Structure Of Universe, Magnetic Fields, Polarization

Scientific paper

We present a new ongoing study on the Coma cluster magnetic field aimed at constraining its strength and structure. At this scope we obtained polarization data of 5 sources in the Coma cluster field at the Very Large Array at 3.6 and 6 cm and derived Faraday Rotation Measures at the kpc scale. We simulated random three dimensional magnetic fields and by assuming a beta model for the thermal gas distribution, we derived simulated RM images. By comparing observations with simulations, we derived the magnetic field model that best reproduces our observational data. Despite the small number of sources, we can give some constraints on the magnetic field strength and structure.

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