publication . Article . 1997

Molecular excitation in Centaurus A: the ^13^CO J=1-0 map and CO line ratios.

Wild, W.; Eckart, A.; Wiklind, T.;
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  • Published: 01 Jun 1997
Abstract
We present a fully sampled map of the ^13^CO J=1-0 emission in the dust lane of Centaurus A as well as ^13^CO 2-1 and for the first time C^18^O 1-0 spectra at selected positions. The morphology of the ^13^CO map is similar to the ^12^CO 1-0 and 2-1 maps. Maps of the ^12^CO 2-1/1-0 and ^12^CO/^13^CO 1-0 ratios show small variations of the ratios throughout the disk with a rise of the ^12^CO 2-1/1-0 ratio towards the southeast. The values found are within the range as found in other galaxies. Radiative transfer calculations indicate a kinetic temperature of 10-15K and H_2_ densities on the order of 3x10^4^cm^-3^. In the southeastern part of the dust lane, the gas ...
Subjects
free text keywords: GALAXIES: INDIVIDUAL: NGC 5128, GALAXIES: NUCLEI, GALAXIES: ISM, RADIO LINES: GALAXIES
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