CO J=2->1 observations of the nearby galaxies Dwingeloo 1 and Dwingeloo 2
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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 230GHz 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 Dw1, a 3-sigma upper limit of 40mK for the CO J=2->1 emission from the nucleus was obtained.
5 pages, 3 Postscript figures, uses laa.sty also online version at http://www.jach.hawaii.edu/~rpt/pubs.html
5 pages, 3 Postscript figures, uses laa.sty also online version at http://www.jach.hawaii.edu/~rpt/pubs.html