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X-Ray Observations of Galaxy-Quasar Associations

Published online by Cambridge University Press:  25 May 2016

H. Arp
H. Arp*
Affiliation:
Max-Planck-Institut für Astrophysik, D-85740 Garching, Germany

Abstract

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Five examples of close associations of quasars with bright, low redshift galaxies have been observed in X-ray wavelengths with ROSAT. In 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 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. Brighter X-ray sources in these fields are found to be in excess of average survey values. The filaments and connections have measured fluxes of 1 ≲ FX ≲60 × 10−13erg cm−2s−1 and they tend to radiate more strongly in the harder end of the 0.1-2.4 keV energy band.

The most surprising result is the evidence that X-ray sources of optically diverse character are linked together in lines and extended filaments. Because of the rapid decay time of the high energy X-ray radiation, it is implied that we are observing some ongoing process possibly related to matter creation or emergence.

Type
Part I: Invited Reviews
Information
Symposium - International Astronomical Union , Volume 168: Examining the Big Bang and the Diffuse Background Radiations , 1996 , pp. 369 - 380
Copyright
Copyright © Kluwer 1996 

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