Radio Galaxy Zoo Talk

chance alignment or not?

  • Ptd by Ptd

    There are two double lobes here, is that they are oriented so similarly anything other than just chance? Their z's are similar but not that similar that they are actually associated with each other?

    Posted

  • 42jkb by 42jkb scientist, admin in response to Ptd's comment.

    At first thought I would say that this is just a chance alignment. However, if they are at similar redshifts, this does spark a question.

    Posted

  • ivywong by ivywong scientist, admin

    Verging into galaxy formation territories here.. 😉

    A simple explanation could be that when these galaxies first formed, they are in the same cosmic filament where the cosmic accretion had similar angular momenta. This results in galaxies with a "preferred" orientation and since the accretion disks of supermassive black holes are usually consistent to the angular momentum of the initial galaxy disk, the similar jet orientations are a result of this.

    Posted

  • Ptd by Ptd

    Hi folks
    Many thanks for responses

    zs are

    0.384 ± 0.0865 for SDSS J125500.11+433453.6 and 0.309 ± 0.1475 for SDSS J125508.08+433448.6 so I suppose allowing for the errors in those numbers these two could be at the same distance.

    had a look at a wide field of view in FIRST and couldn't see any more oriented like this. One wonders how close these two may have been in the past?

    As an aside do you know if there is a way of seeing where, on a 3D map of the universe such as this http://www.atlasoftheuniverse.com/ where SDSS targets are? It would be nice to see where in 3D the thing you've just classified is.

    MT

    Ptd

    Posted