Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...316...57a&link_type=abstract
Astronomy and Astrophysics, v.316, p.57-78
Astronomy and Astrophysics
Astrophysics
20
Galaxies: Distances And Redshifts, General, Interactions, Quasars: General, X-Rays: Galaxies
Scientific paper
Five examples of close associations of quasars with bright, low redshift galaxies have been observed in X-ray wavelengths with ROSAT. In the three cases where the galaxies are detected strongly, the nuclei of the galaxies have X-ray extensions in the direction of the adjacent quasars. In all cases the active galaxies and bright quasars are located at the origin of apparent lines or pairs of X-ray sources, some involving filamentary X-ray connections to fainter quasars or candidate blue stellar objects. A number of X-ray sources in these fields are found to be in excess of average background values. The filaments and connections have measured fluxes of 0.1<~F_X_<~2x10^-13^erg/cm^2^/s and they tend to radiate more strongly in the harder end of the 0.1-2.4keV energy band. Tables of positions and properties of the detected X-ray sources in each field are given and candidates for optical identifications are described.
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