1997/09/29 by G. Giovannini, W. D. Cotton, L. Feretti +3 · 3 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Flux (metallurgy) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Merlin (protein) #Physics #Proper motion #Radio Astronomy Observations and Technology #Radio galaxy #Redshift #Scale (ratio) #Stars #Very-long-baseline interferometry #astro-ph
paper · pdf · doi:10.1086/305159
12 pages, Figures included; Latex file aas2pp4.sty and amssym.sty included; Astrophysical Journal accepted
arxiv created 1997/09/29 · openalex publication_date 1998/02/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present new VLA, MERLIN, and VLBI images for the radio galaxy 3C 338 and the results of the monitoring of its arcsecond core flux density. Present high-sensitivity observations allow us to investigate the radio structure of this source and to confirm the presence of two symmetric parsec-scale jets. Morphological changes between different epochs are evident, and a proper motion with β ~ 0.4 h -1 has been derived. This allows us to give a lower limit for the Hubble constant. While the steep-spectrum large-scale structure of 3C 338 could be a relic emission, the small-scale structure looks young, similar to the high-power medium-sized symmetric objects (MSOs) found at high redshift.