Monitoring the Jet in Centaurus A at 0.1 Parsec Resolution

R.a. Preston, S.j. Tingay, D.l. Jauncey, J.e. Reynolds, J.e.j. Lovell, P.m. Mcculloch, A.k. Tzioumis, M.e. Costa, D.w. Murphy, D.l. Meier, D.l. Jones, R.w. Clay, P.g. Edwards, S.p. Ellingsen, R.h. Ferris, R.g. Gough, P. Harbison, P.a. Jones, E.a. King, A.j. KemballV. Migenes, G.d. Nicolson, M.w. Sinclair, T.d. Van Ommen, R.m. Wark, G.l. White

Research output: Contribution to journalArticlepeer-review

Abstract

Centaurus A is the closest active extragalactic radio source, at a distance of approximately 3.5 Mpc, and is identified with the peculiar elliptical galaxy NGC 5128. As such it is a very important target for observations of the small-scale (sub-parsec) and large-scale (kpc) structures in extragalactic jets. Here we present Mk-II VLBI observations made at 8.4 GHz over a 4.3 year period from early 1991 until mid-1995, as well as a 4.8 GHz observation that was co-eval with one of the 8.4 GHz observations. All of the observations were made with the SHEVE array except for the last observation which was made with the VLBA. The dual-frequency observations identify the core of the radio source, while the multi-epoch observations show the complex structural evolution at a resolution of 0.1 pc. Subluminal motion of ≈ 0.15c is evident. Structural changes are observed on time scales shorter than four months.
Original languageEnglish (US)
Pages (from-to)21-22
JournalSymposium - International Astronomical Union
Volume175
DOIs
StatePublished - Jan 1 1996

Fingerprint Dive into the research topics of 'Monitoring the Jet in Centaurus A at 0.1 Parsec Resolution'. Together they form a unique fingerprint.

Cite this