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- W2135584313 abstract "High-resolution ROSAT HRI soft X-ray observa- tions of four E/S0 galaxies were conducted by us. The data show no signs of Seyfert activity in the X-ray regime. The cen- tral emission peaks of the four galaxies, NGC533, NGC2832, NGC4104 and NGC6329, are associated with their cooling flows. The half intensity radii of the cooling flows range from 0.8 to 3.5 kpc. We nd a trend (based up to now on only ve ob- jects)oftheradiopowerofthecoresinE/S0galaxiestoincrease with the size and the accretion rates of their cooling flows. In one galaxy, NGC4921, no centrally peaked extended gaseous envelope was found, which is most likely due to the fact that it is not an E/S0 galaxy, but an early-type spiral. NGC2885, the sixth galaxy in our initial sample, shows signs of X-ray emission from an AGN. It has also been clas- sied as a Sy-1 AGN by Bade et al. (1995). However, opti- cal imaging suggests that this galaxy is probably not an E or S0 type system either, but rather 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-ray luminous Sy-1 nucleus in NGC2885 is no surprise." @default.
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- W2135584313 date "1998-01-01" @default.
- W2135584313 modified "2023-10-16" @default.
- W2135584313 title "ROSAT HRI observations of six early-type galaxies" @default.
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