X-ray Properties of Radio-Selected Dual Active Galactic Nuclei

Merger simulations predict that tidally induced gas inflows can trigger kpc-scale dual active galactic nuclei (dAGN) in a heavily obscured environment. Previously with the Very Large Array, we have confirmed four dAGN with redshifts between $0.04 < z < 0.22$ and projected separations between 4.3 and 9.2 kpc in the SDSS Stripe 82 field. In this installment, we present Chandra X-ray observations that spatially resolve these dAGN and compare their multi-wavelength properties to those of single AGN from the literature. We detect X-ray emission from six of the merging components and obtain upper limits for the remaining two. The rest-frame X-ray luminosities range between $39.9 < \log L_{\rm X}/{\rm erg\,s^{-1}} < 42.0$. Combined with previous radio and optical observations, we find that our dAGN have properties similar to nearby low-luminosity AGN and Seyferts, and they agree well with the black hole fundamental plane relation. Based on the X-ray hardness ratio, we find only one obscured AGN in our sample. The distributions of hardness ratios of our sample and a matched sample of single AGN shows no significant differences. Considering the contribution from star-formation to the mid-infrared continuum and optical [O III] line luminosities, we find no convincing evidence that these dAGN are more obscured than single AGN, in contrast to the predictions from simulations.