ROSAT HRI OBSERVATIONS OF 6 EARLY-TYPE GALAXIES

High-resolution ROSAT HRI soft X-ray observations of four E/SO galaxie s were conducted by us. The data show no signs of Seyfert activity in the X-ray regime. The central emission peaks of the four galaxies, NGC 533, NGC 2832, NGC4104 and NGC 6329, are associated with their coolin g flows. The half intensity radii of the cooling flows range from 0.8 to 3.5 kpc. We find a trend (based up to now on only five objects) of the radio power of the cores in E/SO galaxies to increase with the siz e and the accretion rates of their cooling flows. In one galaxy, NGC49 21, no centrally peaked extended gaseous envelope was found, which is most likely due to the fact that it is not an E/SO galaxy, but an earl y-type spiral. NGC 2885, the sixth galaxy in our initial sample, shows signs of X-ray emission from an AGN. It has also been classified as a Sy-1 AGN by Bade et al. (1995). However, optimal imaging suggests tha t this galaxy is probably not an E or SO type system either, but rathe r an early-type spiral galaxy. Thus, in the context of accretion rate vs. galaxy type models of low-luminosity AGNs, the presence of an X-ra y luminous Sy-1 nucleus in NGC 2885 is no surprise.