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Eckart, A.; Cameron, M.; Rothermel, H.; Wild, W.; Zinnecker, H.; Olberg, M.; Rydbeck, G.; Wiklind, T.
The interstellar medium in external galaxies: Summaries of contributed papers1990
The interstellar medium in external galaxies: Summaries of contributed papers1990
AbstractAbstract
[en] Researchers present maps of the CO-12(1=0) line and the 100 micron and 50 micron far-infrared emission of Centaurus A, as well as measurements of the CO-12(2-1), CO-13(1-0), and the C-18O(1-0) lines at selected positions. The observations were taken with the Swedish-ESO Submillimeter Telescope (SEST) and the CPC instrument on board the Infrared Astronomy Satellite (IRAS). The millimeter data show that the bulk molecular material is closely associated with the dust lane and contained in a disk of about 180 seconds diameter and a total molecular mass of about 2 x 10 to the 8th power solar mass. The total molecular mass of the disk and bulge is of the order of 3 x 10 to the 8th power solar mass. The molecular gas in the nucleus is warm with a kinetic temperature of the order of 15 K and a number density of 10 to the 3rd power to 3 x 10 to the 4th power cm(-3). Absorption features in the CO-12 and CO-13 lines against the nuclear continuum emission indicate that the properties of giant molecular clouds are comparable to those of the Galaxy. The far-infrared data show that to a good approximation the dust temperature is constant across the dust lane at a value of about 42 K. The ratio between the far-infrared luminosity and the total molecular mass is 18 solar luminosity/solar mass and close to the mean value obtained for isolated galaxies. A comparison of the CO-12(1-0) and the far-infrared data indicates that a considerable amount of the far-infrared emission is not intimately associated with massive star formation
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Hollenbach, D.J.; Thronson, H.A. Jr.; National Aeronautics and Space Administration, Moffett Field, CA (USA). Ames Research Center; 431 p; Jul 1990; p. 71; 2. interstellar medium in external galaxies conference; Grand Teton National Park, WY (USA); 3-7 Jul 1989; NASA-CP--3084; A--90075; NAS--1.55:3084; CONF-8907237--; NTIS HC/MF A19; INIS
Record Type
Report
Literature Type
Conference; Numerical Data
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INIS VolumeINIS Volume
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