Radio Galaxy Zoo Talk

ARG0001q49, hourglass?

  • ChrisMolloy by ChrisMolloy

    Here's ARG0001q49, which appears to be an #hourglass.

    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.

    A possible host for the emission appears to be SDSS J115525.57+300303.8, which has a z_sp=0.413 +/- 0.00011. This object has radio references in NED and Simbad, and an ALLWISE reference, ALLWISE J115525.58+300303.4. This galaxy is in the centre of the lobes.

    SDSS J115525.57+300303.8

    enter image description here

    There are radio references in NED and Simbad for SDSS J115525.90+300255.2, which has a z_sp=0.417 +/-0.00011. This object is positioned on the southern lobe. Whether this galaxy is the host of the emission is hard to discern.

    SDSS J115525.90+300255.2

    enter image description here

    Both these galaxies seem to have #red and #green #outflows, and appear to be a #g-pair, being at the same redshift.

    As always, comments, suggestions, welcome.

    Posted

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

    If the SE galaxy is, in fact, more distant than the central one (as they're both apparently in the same cluster, a redshift difference of ~0.004 is too small to be useful), then radio from the hourglass host would pass through and around it, and its ISM may leave an imprint.

    The outflows are curious; I wonder how real they are (i.e. not artifacts)?

    Posted

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

    The outflows are curious; I wonder how real they are (i.e. not artifacts)?

    Hard to say. DECaLS and PanSTARRS aren't much help.

    Posted