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Interstellar Matter in Active Galaxies

Published online by Cambridge University Press:  03 August 2017

Endrik Krügel
Endrik Krügel*
Affiliation:
Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 5300 Bonn 1, FRG

Extract

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In 1986 three papers claimed that for bright IRAS galaxies their luminosity L is proportional to the amount of interstellar matter Mgas they contain. Mgas was derived from the CO luminosity and from the submm/mm dust emission. Both methods roughly agree and it is found that L/Mgas ≈ 5…10 in solar units. However, detailed comparison is still far from satisfactory. For example, for the five objects detected in both samples the dust emission gives (for comparable beams and using the same distances) on the average 2.5 larger gas masses than CO. This may be partially explained by the fact that the dust also emits from regions of neutral hydrogen, whereas CO emission is restricted to H2 clouds. Nevertheless, gas mass are still controversial.

Type
IX- Galaxy Nuclei
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 307 - 309
Copyright
Copyright © Kluwer 1991 

References

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