engleski

Relation between dust and radio luminosity in optically selected early type galaxies

We have surveyed an optical/IR selected sample of nearby E/S0 galaxies with and without nuclear dust structures with the VLA at 3.6 cm to a sensitivity of 100 $\mu$Jy. We can construct a Radio Luminosity Function (RLF) of these galaxies to $\sim 10^{; ; ; 19}; ; ; $ W Hz$^{; ; ; -1}; ; ; $ and find that $\sim 50$\% of these galaxies have AGNs at this level. The space density of these AGNs equals that of starburst galaxies at this luminosity. Several dust-free galaxies have low luminosity radio cores, and their RLF is not significantly less than that of the dusty galaxies.

Galaxies: elliptical and lenticular; radio luminosity function; nuclei; dust

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