Radio Galaxy Zoo Talk

ARG000jjg - Multiple Spirals?

  • sharqua by sharqua

    I am seeing more than one spiral galaxy that lines up with this on SDSS. Is this multiple sources or just one?

    Posted

  • JeanTate by JeanTate

    Welcome to Radio Galaxy Zoo, sharqua!

    This is a very, very cool field! 😄

    It's unclear - to me - which of the several interacting galaxies in this - apparently unnamed! 😮 - tight ('compact') group is the host of the radio emission (and it's possible, I guess, for there to be more than one).

    Only one has a SDSS spectroscopic redshift (of 0.189), SDSS J212804.10+041738.4, the object in the center of the image:

    enter image description here

    This particular galaxy seems - to me - to be more elliptical ('red and dead') than spiral, unlike most of the others ...

    One possible complication: several of the faint, reddish blobs in this field may be members of a distant cluster, with z_ph >~0.4; perhaps at least some of the radio emission comes from one of them?

    Happy hunting! 😃

    Posted

  • sharqua by sharqua

    Thanks for the additional information! The universe is SUCH a beautiful place.

    Posted

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

    Just which galaxy, or galaxies, is/are the host(s)? Perhaps it (or one) is a spiral/disk galaxy, with extended radio emission?

    enter image description here

    The galaxy in the center is SDSS J212804.10+041738.4, the one big galaxy that is not obviously a spiral:

    enter image description here

    Boilerplate: SDSS image per http://skyservice.pha.jhu.edu/DR10/ImgCutout/getjpeg.aspx, FIRST (red) contours derived from the FITS file produced using SkyView with Python code described in this RGZ Talk thread. Image center (J2000.0) is the galaxy SDSS J212804.10+041738.4; "z_sp" its SDSS spectroscopic redshift.

    Posted

  • 42jkb by 42jkb scientist, admin

    This is very interesting. I would say that the host is the central galaxy, most likely the elliptical. The bent structure of the radio source indicates that the radio source lives in a very dynamic environment, usually associated with a group or cluster.

    Posted