Radio Galaxy Zoo Talk

1637+2140 - triple?

  • JeanTate by JeanTate

    From the Interesting things from NVSS survey thread, started by Dolorous Edd (first post):

    Triple, I think , center ~ 16 36 57.17 +21 40 17.3 SDSS J163657.18+214016.9 or J163657.20+214009.2

    enter image description here

    The southern NVSS and FIRST blob looks very much like a lobe, and there may be a faint FIRST source in the center.

    But what's the northern blob? An unrelated doublelobe? Or the core+lobe counterpart of the southern blob? Maybe zoom out some, and center on the FIRST source in the northern blob?

    enter image description here

    <enter image description here>

    Boilerplate: SDSS image per http://skyservice.pha.jhu.edu/DR10/ImgCutout/getjpeg.aspx, FIRST (red) and NVSS (cyan) contours derived from FITS files produced using SkyView with Python code described in this RGZ Talk thread. Image center, J2000.0, is (249.2375, 21.6714).

    Posted

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

    But what's the northern blob? An unrelated doublelobe? Or the core+lobe counterpart of the southern blob? Maybe zoom out some, and center on the FIRST source in the northern blob?

    First, the central object - possible host of the triple - is z_ph 0.196±0.0121/0.199±0.0331 SDSS J163657.18+214016.9:

    enter image description here

    It is a faint FIRST source:

    enter image description here

    The S component of the N lobe appears to have a compact FIRST source at - or near - its center; there's an ETG there, 0.187±0.0088/0.182±0.0298 SDSS J163701.58+214256.3:

    enter image description here

    This may create this weaker component of the N lobe of the triple, making it appear as though it's a doublelobe:

    enter image description here

    Boilerplate: SDSS images per http://skyservice.pha.jhu.edu/DR10/ImgCutout/getjpeg.aspx, FIRST (red) and NVSS (cyan) contours derived from FITS files produced using SkyView with Python code described in this RGZ Talk thread. Top image center (J2000.0) is the galaxy SDSS J163657.18+214016.9; 'z_ph' its 'SDSS' photometric redshift; bottom image center (J2000.0) is the galaxy SDSS J163701.58+214256.3; 'z_ph' its 'SDSS' photometric redshift.

    Posted