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

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.

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

References in corpus (5)

• The morphology of the emission line region of Compact Steep Spectrum radio sources
• A strong jet/cloud interaction in the Seyfert galaxy IC 5063: VLBI observations
• Magnetic Fields in Quasar Cores II
• Compact steep-spectrum sources from the S4 sample
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Cited by in corpus (9)

• Compact steep-spectrum and peaked-spectrum radio sources
• The interpretation of Rotation Measures in the presence of inhomogeneous foreground screens
• Optical-radio positional offsets for active galactic nuclei
• Polarization asymmetry in CSS sources: evidence of AGN fuel?
• Jets in radio galaxies and quasars: an observational perspective
• Radio Polarimetry of 3C119, 3C318, and 3C343 at milliarcsecond resolution
• Radio polarimetry of compact steep spectrum sources at sub-arcsecond resolution
• VLBA polarimetric observations of the CSS quasar 3C147
• B1524-136: A CSS quasar with two-sided radio jets