Radio Galaxy Zoo Talk

ARG00022mp, triple or doublelobe, host?

  • ChrisMolloy by ChrisMolloy

    Here's ARG00022mp, which appears to be either a #slip-strike #doublelobe, or a #triple. The contour overlay below is centred on SDSS J113400.18+242423.7, which is ENE of the ARG co-ordinates listed left.

    enter image description here

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
    thread.     First in red, Wise band 1 lime green.

    A possible host for the emission could be SDSS J113400.18+242423.7, which has a z_ph=0.362 ± 0.0800. This galaxy is partially #green, has recorded First flux emission, and has an ALLWISE reference, ALLWISE J113400.19+242423.7. This object is positioned in the centre of the emission.

    SDSS J113400.18+242423.7

    enter image description here

    There are radio references in NED centred on SDSS J113358.76+242418.2. This galaxy has a z_ph=0.391 ± 0.1603. It is positioned near the eastern edge of the west lobe.

    SDSS J113358.76+242418.2

    enter image description here

    There are also SIMBAD references for a radio source which is south of SDSS J113358.76+242418.2. Some of these citations are the same as those cited in NED for SDSS J113358.76+242418.2. There doesn't appear to be a photometric object listed in SDSS DR14 for a galaxy at the SIMBAD location.

    Finally, this ARG field doesn't appear to have been imaged in VLASS as yet.

    As always, comments, suggestions, welcome.

    Posted

  • payton.rodman by payton.rodman scientist in response to ChrisMolloy's comment.

    This is definitely a weird source, and that NW spur makes things quite intriguing

    We do know that jets can move (precess) over time, but I think the change in direction here is far too extreme for that unless we're viewing these jets directly "down the barrel". Even then, we might expect more emission from the core and for that more distant jet to disappear completely, neither of which are really happening here.

    It could also be fast movement of the host, which will sweep back lobes. I don't think it's bright enough to be a part of the primary jet/lobe on that side, and could instead be part of the backswept material from that main hotspot.

    My best guess would be that the source is moving through the environment and dragging that backswept material behind it, perhaps coupled with an odd viewing angle. Those are certainly some large jets for a source out at z>0.3, so the environment could be a key factor here.

    Posted

  • ChrisMolloy by ChrisMolloy in response to payton.rodman's comment.

    Thanks for the response.

    Posted