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Milli-arcsecond scale Rotation Measure in the CSS Quasars 0548+165 and 1524-136

F. Mantovani·W. Junor·R. Ricci·D. J. Saikia·C. Salter·M. Bondi
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Abstract

Two Compact Steep-spectrum Sources (CSSs), 0548+165 and 1524-136, chosen from a list of CSSs with polarization percentages that decrease with decreasing frequency and high rotation measure values (RM > 450 rad/m**2) on arcsecond scales, were observed with the VLBA at 4.9 and 8.4 GHz. RM values up to ~10**4 rad/m**2 were found in several regions along the jets in both sources. We suggest that a thin screen of magneto-ionic material with about 1 kpc thickness is responsible for these high RMs. The observed depolarization may be due to beam depolarization and/or inhomogeneities in the magnetic field.

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F. Mantovani, W. Junor, R. Ricci, D. J. Saikia, C. Salter, M. Bondi. 2002-03-20. Milli-arcsecond scale Rotation Measure in the CSS Quasars 0548+165 and 1524-136. https://doi.org/10.1051/0004-6361%3A20020482

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