CO J = 2→1 observations of the nearby galaxies Dwingeloo 1 and Dwingeloo 2

R. P.J. Tilanus, W. B. Burton

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present an exploratory survey of the central regions of the nearby spiral galaxies Dwingeloo 1 and Dwingeloo 2 made in the CO J = 2→1 line at 230 GHz using the James Clerk Maxwell Telescope. In Dwingeloo 1, which is probably the nearest grand-design barred spiral, the CO emission was sampled along a cross with its major axis aligned with the bar. The CO emission is an order of magnitude weaker (peak Tmb ≈ 70mK) than in its neighbours IC 342 and Maffei 2 and appears to be confined to the nucleus, bar, and spiral arms. In Dwingeloo 2, a small system quite likely to be a companion of Dw 1, a 3-sigma upper limit of 40 mK for the CO J = 2→1 emission from the nucleus was obtained.

Original languageEnglish (US)
Pages (from-to)899-903
Number of pages5
JournalAstronomy and astrophysics
Volume324
Issue number3
StatePublished - Aug 20 1997
Externally publishedYes

Keywords

  • Galaxies: individual: Dw 1
  • Galaxies: individual: Dw 2
  • Radio lines: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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