The Extreme Ultraviolet Deficit - Jet Connection in the Quasar 1442+101

Abstract

In previous studies, it has been shown that the long term time average jet power, $\overline{Q}$, is correlated with the spectral index in the extreme ultraviolet (EUV), ${\alpha }_{EUV}$ (defined by $F_{\nu }\sim {\nu }^{-{\alpha }_{EUV}}$ computed between 700Å\, and 1100Å\,). Larger $\overline{Q}$ tends to decrease the EUV emission. This is a curious relationship because it connects a long term average over $\sim 10^6$ years with an instantaneous measurement of the EUV. The EUV appears to be emitted adjacent to the central supermassive black hole and the most straightforward explanation of the correlation is that the EUV emitting region interacts in real time with the jet launching mechanism. Alternatively stated, the $\overline{Q}$ - ${\alpha }_{EUV}$ correlation is a manifestation of a contemporaneous (real time) jet power, $Q(t)$, correlation with ${\alpha }_{EUV}$. In order to explore this possibility, this paper considers the time variability of the strong radio jet of the quasar 1442+101 that is not aberrated by strong Doppler enhancement. This high redshift (z = 3.55) quasar is uniquely suited for this endeavor as the EUV is redshifted into the optical observing window allowing for convenient monitoring. More importantly, it is bright enough to be seen through the Lyman forest and its radio flux is strong enough that it has been monitored frequently. Quasi-simultaneous monitoring (five epochs spanning $\sim 40$ years) show that increases in $Q(t)$ correspond to decreases in the EUV as expected.

To appear in ApJ

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• The Extreme Ultraviolet Variability of Quasars
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• Characterising the extended morphologies of BL Lacs at 144 MHz with LOFAR
• Estimating the Jet Power of Mrk\,231 During the 2017-2018 Flare
• The Extreme Ultraviolet Spectra of Low Redshift Radio Loud Quasars
• From Nearby Low Luminosity AGN to High Redshift Radio Galaxies: Science Interests with SKA