The structure of the radio emission from the NGC 1579/LkHalpha 101 region.

Radio-frequency observations at 3.7 and II cm of the NG? 579/LkHcc 101 region show that the radio emission arises in a compact, <I core concentric with a more extended I' emission region. At these wavelengths the compact component is optically thick, with a spectrum increasing as V, whereas the extended region is optically thin and contributes at least 8o per cent of the total flux density. LkHa 101 appears to be the source of excitation for all of the radio emission; this result, together with the total infrared luminosity, suggests that an appropriate spectral classification for LkHa 101 is BI lie.