Using the very long baseline array, we perform the double-band polarization observations of the compact radio source 0400+258 at 5 GHz and 8 GHz. We present its mas-resolution total intensity maps and, for the first time, its polarization maps at 5 GHz and 8 GHz frequency bands. The source 0400+258 displays one-sided core-jet structure, and the polarization emission is firmly detected in a region near the core. Besides, by fitting the polarization maps at four frequencies, the mas-scale rotation measure of the source is obtained for the first time. After removing the rotation measure, the intrinsic magnetic field of the source is acquired, which demonstrates that the magnetic field direction is roughly parallel to the direction of the jet.
LI Yuhang
,
ZHANG Haiyan
,
CHEN Rurong
,
CHEN Tianlu
. VLBI polarization study of compact radio sources 0400+258[J]. Journal of University of Chinese Academy of Sciences, 2023
, 40(1)
: 79
-83
.
DOI: 10.7523/j.ucas.2022.001
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