Galaxy Zoo Talk

Ring or ...

  • Peter_Dzwig by Peter_Dzwig

    Is there any consensus on this one? It looks like a barred spiral at first glance but if you look closer it is more like a bright core with a ring around it. Looks a bit Hoag-like. RA: 357.770186111755, DEC: 6.41669597874043

    NED gives 2MASX J23510481+0625003; z unknown. Looking in the filters it has no signature in the u using most filter models.

    Posted

  • ElisabethB by ElisabethB moderator

    Looks like a two-armed, barred spiral to me.

    Posted

  • JeanTate by JeanTate

    Here's a zoomed in DR8 image:

    enter image description here

    The inner part is what I think is called a lens, in Buta's Galaxy Morphology (I can't see any bars), with a hint of ansae (slightly whiter cusps). The outer parts would benefit from having circles and logarithmic spirals overplotted; short of doing that, I'd say there is at least one spiral arm, and almost certainly a ring too. Oddly, the arm(s) do not seem to originate at the end(s) of the bar/lens ...

    My guess would be that formation history is 'secular evolution', rather than collisional (Hoag-like). Why? Because the arms/ring are dead and red, but collisional rings are sites of furious star-formation.

    Posted