Mathematics – Logic
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf...99b&link_type=abstract
6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce
Mathematics
Logic
1
Scientific paper
All 293 AGN of the most recently completed VLBI survey of the Caltech-Jodrell Bank flat spectrum sample (hereafter CJF) have been observed in the ROSAT All-Sky survey and in part in pointed PSPC observations. We here summarize the radio properties, the soft X-ray properties for the complete CJF survey, and give a progress report on the search for correlations between the X-ray and VLBI properties for those sources with motion information (242 sources). Comparing the observed and the predicted X-ray flux by assuming the observed X-rays to be of inverse Compton origin, we compute the beaming or Doppler factor δIC for the CJF sources.
We compare the Doppler factors with other beaming indicators derived from the VLBI observations, such as the value of the expansion velocity. In addition, we discuss a possible correlation between the complexity of the extended emission seen with the VLA (literature) and the X-ray flux density.
AGN are our principal probes of the universe on large scales; understanding them is essential to studying the evolution of the universe. The most promising tool we have is the investigation of correlations between the flux-density in different wavelength regimes and the morphological variations of the jet obtained from VLBI observations. We here present first results of the analysis of the completed survey and wish to refer to the specific papers for a detailed description of the analysis and results presented here only in summary.
Brinkmann Wolfgang
Britzen Silke
Browne Ian W. A.
Campbell Robert Moses
Gliozzi Mario
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