18–22 cm VLBA Observational Evidence for Toroidal B-Field Components in Six AGN JetsReportar como inadecuado


18–22 cm VLBA Observational Evidence for Toroidal B-Field Components in Six AGN Jets


18–22 cm VLBA Observational Evidence for Toroidal B-Field Components in Six AGN Jets - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, São Paulo 05508-090, Brasil

2

Physics Department, University College Cork, Cork, Ireland





*

Author to whom correspondence should be addressed.



Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad

Abstract The formation of relativistic jets in Active Galactic Nuclei AGN is related to accretion onto their central supermassive black holes, and magnetic B fields are believed to play a central role in launching, collimating, and accelerating the jet streams from very compact regions out to kiloparsec scales. We present results of Faraday rotation studies based on Very Long Baseline Array VLBA data obtained at 18–22 cm for six well known AGN OJ 287, 3C 279, PKS 1510-089, 3C 345, BL Lac, and 3C 454.3, which probe projected distances out to tens of parsecs from the observed cores. We have identified statistically significant, monotonic, transverse Faraday rotation gradients across the jets of all but one of these sources, indicating the presence of toroidal B fields, which may be one component of helical B fields associated with these AGN jets. View Full-Text

Keywords: AGN; relativistic jets; polarization; radio interferometry AGN; relativistic jets; polarization; radio interferometry





Autor: Juliana Cristina Motter 1,2,* and Denise Carmen Gabuzda 2

Fuente: http://mdpi.com/



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