NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-26 T00:42:28 PDT
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For refcode 2013MNRAS.431.2471B:
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NED Abstract

Copyright by Royal Astronomical Society. 2013MNRAS.431.2471B The AT20G view of Swift/BAT selected AGN: high-frequency radio waves meet hard X-rays Burlon, D.; Ghirlanda, G.; Murphy, T.; Chhetri, R.; Sadler, E.; Ajello, M. Abstract. We cross-matched the 6-year Swift/Burst Alert Telescope (BAT) survey of active galactic nuclei (AGN) with the AT20G radio survey of the southern sky, which is one of the largest high-frequency radio surveys available. With these data we investigated the possible correlation between the radio and the X-ray emission at the highest radio and X-ray frequencies. We found 37 AGN with a high probability of association (>80 per cent), among which 19 are local Seyfert galaxies (with median redshift z = 0.03) and 18 blazars. We found that ~20 per cent of the AGN detected in hard X-rays are also bright radio sources at 20 GHz, but the apparent correlation between the radio and hard X-ray luminosity is completely driven by the different median redshifts of the two subgroups of AGN. When we consider only the local Seyfert sample we find no evidence of a correlation between their 20 GHz and 15-55 keV power. Therefore it appears that at high frequencies the radio-X connection, which had been previously observed at lower frequencies, disappears. The disappearance of the radio-X correlation at high radio and X-ray frequencies could be tested through Very Long Baseline Interferometry and the use of the Nuclear Spectroscopic Telescope Array (NuSTAR) satellite. Key words: radiation mechanisms: non-thermal, quasars: general, radio continuum: general, X-rays: general
Retrieve 46 NED objects in this reference.
Please click here for ADS abstract

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