Abstract
The objectives of this note are: (1) to show the time variability of the thermal jet Cep A HW2 from 1982.4 to 1990.2 both in clean and in restored maximum entropy (ME) maps (see Figure [*] ; the ME method provides an improvement in angular resolution), (2) to show that the radio continuum source R5, detected systematically in centimeter images made after 1986, was not present or was significantly fainter in the 1982.4 image reanalyzed here, and (3) to speculate that the turn-on of the source R5 may be related to the birth of an OB star or to a poorly understood interaction between the Cep A HW2 jet and a passive structure associated with R5.
