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Subparsec-scale structure and evolution of Centaurus A (NGC5128)
journal contribution
posted on 2023-05-16, 20:03 authored by Jauncey, DL, Tingay, SJ, Preston, RA, Reynolds, JE, James LovellJames Lovell, Peter McCullochPeter McCulloch, Tzioumis, AK, Costa, ME, Murphy, DW, Meier, DL, Jones, DL, Amy, SW, Biggs, JD, Blair, DG, Clay, RW, Edwards, PG, Simon EllingsenSimon Ellingsen, Ferris, RH, Gough, RG, Harbison, P, Jones, PA, King, EA, Kemball, AJ, Migenes, V, Nicolson, GD, Sinclair, MW, van Ommen, T, Wark, RM, White, GLWe present a series of 8.4-GHz very-long-baseline radio interferometry images of the nucleus of Centaurus A (NGC5128) made with a Southern Hemisphere array, representing a 3.3-year monitoring effort. The nuclear radio jet is ≃50 milliarcseconds in extent, or at the 3.5-megaparsec distance of NGC5128, ≃1 parsec in length. Subluminal motion is seen and structural changes are observed on time scales shorter than 4 months. High- resolution observations at 4.8 and 8.4 GHz made in November 1992 reveal a complex morphology and allow us to unambiguously identify the self-absorbed core located at the southwestern end of the jet.
History
Publication title
Proceedings of the National Academy of Sciences of the United States of AmericaVolume
92Issue
25Pagination
11368-11370ISSN
0027-8424Department/School
School of Natural SciencesPublisher
National Academy of SciencesPlace of publication
Washington DC, USARepository Status
- Restricted
