2008/03/01 by Keiichi Asada, Makoto Inoue, Seiji Kameno +1 · 51 citations
Mathematics · Physics and Astronomy · #Anatomy #Astrophysics #Astrophysics and Cosmic Phenomena #Computer science #Faraday cage #Faraday effect #Galaxy #Gamma-ray bursts and supernovae #Geometry #Jet (fluid) #Line (geometry) #Magnetic field #Mathematics #Measure (data warehouse) #Mechanics #Optics #Physics #Pulsars and Gravitational Waves Research #Quasar #Rotation (mathematics) #Transverse plane #Variation (astronomy) #astro-ph
paper · pdf · doi:10.1086/524000
published in The Astrophysical Journal 675(1), 79-82 (IOP Publishing) · 12 pages, 4 figures, published in ApJ
openalex publication_date 2008/03/01 · arxiv created 2008/06/26 · arxiv updated 2010/11/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The existence of a gradient in the Faraday rotation measure (RM) of the quasar 3C 273 jet is confirmed by follow-up observations. A gradient transverse to the jet axis is seen for more than 20 mas in projected distance. Taking account of the viewing angle, we estimate it to be more than 100 pc. Comparing to the distribution of the RM in 1995, we detect a time variation of it at the same distance from the core over 7 yr. We discuss the origin of the Faraday rotation based on this rapid time variation. We rule out foreground media such as a narrow-line region, and suggest a helical magnetic field in the sheath region as the origin of this gradient of the RM.