NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-17 T23:23:08 PDT
Help | Comment | NED Home

For refcode 2003A&A...405..499S:
Retrieve 30 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2003A&A...405..499S Polarization asymmetry in CSS sources: Evidence of AGN fuel? Saikia, D. J.; Gupta, N. Abstract. The compact steep spectrum and gigahertz peaked spectrum sources are widely believed to be young radio sources, with ages la 10^6^ yr. If the activity in the nucleus is fuelled by the supply of gas, one might find evidence of this gas by studying the structural and polarization characteristics of CSS sources as these evolve through this gas. We present polarization observations of a sample of CSS sources, and combine our results with those available in the literature, to show that CSS sources are more asymmetric in the polarization of the outer lobes compared with the more extended ones. We suggest that this could be possibly due to interaction of the jets with infalling material, which fuels the radio source. We also investigate possible dependence of the polarization asymmetry of the lobes on redshift, since this might be affected by more interactions and mergers in the past. No such dependence is found for the CSS sources, suggesting that the environments on the CSS scales are similar at different redshifts. However, the polarization asymmetry of the oppositely-directed lobes is larger at higher redshifts for the more extended sources, possibly reflecting the higher incidence of interactions in the past. Keywords: galaxies: active, quasars: general, galaxies: nuclei, radio continuum: galaxies
Retrieve 30 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home