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

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

2002-03-20

arxiv.org/abs/astro-ph/0203338v1

Astronomy and Astrophysics

Astrophysics

Accepted by Astronomy and Astrophysics; plain tex, 11 pages, 7 figures

Scientific paper

10.1051/0004-6361:20020482

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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