85-GHz BIMA observations of the double-hotspot radio galaxy 3C 20

M. J. Hardcastle, L. W. Looney

Research output: Contribution to journalArticle

Abstract

We present 85-GHz observations of the archetypal double-hotspot radio source 3C 20 made with the BIMA millimetre array. The resolution of BIMA allows us to separate the two components of the eastern hotspot. By comparing the BIMA observations with existing VLA data, we show that the spectra of the two hotspot components are very similar, despite the clear differences in their radio structure and their wide separation. We discuss the implications for models of double hotspot formation. Weak emission from the lobes of 3C 20 is detected at 85 GHz, at a level consistent with the predictions of standard spectral ageing models.

Original languageEnglish (US)
Pages (from-to)355-364
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume320
Issue number3
DOIs
StatePublished - Jan 21 2001

Keywords

  • Galaxies: individual: 3C20
  • Galaxies: jets
  • Radio continuum: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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