Radio Galaxy Zoo Talk

two lobes from two sources, or just one?

  • WizardHowl by WizardHowl

    Whilst the central region of emission seems to be well-aligned with an IR source, to have a second lobe so far seems like an unusual arrangement. If our point of view of a bent source was almost along the line of sight of the line connecting a lobe to a source, then it might look like this, however the radio emission would seem to make more sense if it originated somewhere centrally between the two lobes. The two radio lobes seem slightly extended towards each other so I think they are likely to have a common origin and it is possible that this might be a purely chance alignment of one lobe with a bright IR source, whilst the genuine IR source is too faint to show up in the image. Another possibility is that the two lobes originate from different sources but this seems less likely, given their symmetry.


  • JeanTate by JeanTate in response to WizardHowl's comment.

    In the SDSS the IR source seems to coincide with a largish elliptical (SDSS J100430.67+113347.5), one of several close-by with much the same color. Unfortunately, none have spectra, but the photoz's (~0.3) are consistent with their colors. That suggests that the central source is, indeed, a one-sided jet/lobe+core. If the second radio source is the other lobe, then it would be highly asymmetric system. Perhaps polarization data could help?

    enter image description here


  • DocR by DocR scientist

    Click on the FIRST link above to get the larger field. I'dguess that this one is a #triple, with no IR either WISE or SDSS on the possible central component. This would make it extremely distant. It would be worth deep radio measurements to try to see if there are extended lobes connecting the whole source together.