X-ray observations of five galaxy-quasar associations.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1996
- Bibcode:
- 1996A&A...316...57A
- Keywords:
-
- GALAXIES: DISTANCES AND REDSHIFTS;
- GENERAL;
- INTERACTIONS;
- QUASARS: GENERAL;
- X-RAYS: GALAXIES