http://arxiv.org/abs/2201.03877
The dominant radio emission mechanism in radio-quiet quasars (RQQs) is an open question. Primary contenders include: low-power radio jets, winds, star-formation and coronal emission. Our work suggests that radio polarization and emission-line studies can help to distinguish between these scenarios and determine the primary contributor. Our multi-frequency, multi-scale radio polarization study has revealed a composite jet and “wind” radio outflow in a radio-intermediate quasar, III Zw 2 as well as in the BALQSO, Mrk 231. Our radio polarization study in conjunction with the [O III] emission-line study of five type 2 RQQs have provided insights on the interplay of jets/winds and emission-line gas. These sources reveal an anti-correlation between polarized radio emission and [O III] emission. This is similar to that observed in some radio-loud AGN in the literature and suggests that the radio emission could be depolarized by the emission-line gas. Overall, our work suggests that a close interaction between the radio outflow and the surrounding gaseous environment is likely to be responsible for their stunted form in RQ and RI AGN.
S. S. and P. Kharb
Wed, 12 Jan 22
47/89
Comments: 6 pages, 3 figures, Acta Astrophysica Taurica proceedings for Crimean-2021 AGN Conference “Galaxies with Active Nuclei on Scales from Black Hole to Host Galaxy” dedicated to the E.A. Dibai’s 90th anniversary (13-17 September 2021)
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