4C40.36

This high redshift object was first identified and studied by Chambers et al 1988. Infrared spectroscopy has been obtained by Rawlings and Eales 1993. A small 4" double, 4C40.36 is remarkable for the very high degree of asymmetry in the radio polarization properties of the two lobes (Figure 7). In this and other respects it is quite similar to 4C24.28 discussed above.

The eastern lobe B is completely depolarized at all frequencies. At high spatial resolution A has a bright extension to the north and faint lobe emission to the south. The polarization image at 20 cm (Fig 7c) is extended to the south, at 6 cm the polarization peaks at the extremity of the lobe, and at 2 cm it is (marginally) extended and peaks north of the total intensity image. If the depolarization of 4C40.36 is due to an enveloping medium as suggested by the Laing-Garrington effect then this structure suggests that we are seeing the southwestern lobe A in the foreground, and the we see it through the northeastern edge of the lobe.

Redshifted Ly emission is in the U band, so this image (Figure 7b) is part line and part ultraviolet continuum. It is extended and aligned with the radio axis. The morphology in this band has a slight opening to the west. In V band the peak is X compared to the radio source. Towards the red the peak becomes more compact. In the R and I band the aligned continuum westward of the peak is has become quite faint. Since the emission lines in 4C40.36 are bright, some of the features in the broad band images may be contaminated by different emission lines. The continuum emission is the most compact in the I band (Fig 7e), but still has an aligned component. The K band image is of poor quality, it is not clear if the misaligned structure is real or not.

A faint diffuse object can be seen 2" to the southeast of the eastern lobe. It is detected in all the optical bands and possibly in the K band. It has very similar colors to 4C40.36 and is an excellent candidate for a companion (or subcomponent) of 4C40.36.