Mathematics – Logic
Scientific paper
Dec 1966
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966natur.212.1223h&link_type=abstract
Nature, Volume 212, Issue 5067, pp. 1223-1224 (1966).
Mathematics
Logic
6
Scientific paper
IT was shown in a previous article1 that the inverse Compton process sets severe boundary conditions on the kinds of models of quasi-stellar objects that are compatible with the idea that they are at cosmological distances. In that article it was also shown that the condition that the synchrotron process is responsible for the continuous radiation from these objects leads, if they are at cosmological distances, to a class of model very different from those discussed previously. The restriction stems from the very high density of radiation which must be present in the objects. The total flux emitted if the objects are at cosmological distances is ~ 1047 ergs/ sec, and for an isotropic radiation field the energy density Urad = L/πR2c where R is the dimension of the object. In our previous communication we took a value R<≃1017 cm, suggested by the fluctuation data, so that Urad<≃100 ergs/cm3. If the objects are much closer, that is, if they are local, then Urad<≃10-4 ergs/cm3, and the inverse Compton effect is negligible.
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