THE CYGNUS-X REGION-XXI - RADIO-EMISSION AT 1420 MHZ FROM CYG-OB2 STARS AND 2 PROBABLE COMETARY HII-REGIONS

We have searched our previously published radio surveys of the Cygnus X region for faint radio point sources that may be associated with lum inous stars of the Cyg OB2 association. Five positional coincidences h ave been found between stars and 1420 MHz radio sources. A particularl y interesting example is the Wolf-Rayet star VCLS 146, which has shown a rapid change in 1420 MHz flux density. In addition, sensitive upper limits have been derived for the emission from 14 early-type stars, w hich help establish the time history of their non-thermal radio emissi on. Two radio features have been detected which have the properties of cometary HII regions, except that they are several arcminutes in size . Their detection provides evidence of recent star formation in Cyg OB 2.