Radio Galaxy Zoo Talk

ARG0003848 overedge, doublelobe, SDRAGN candidate?

  • ChrisMolloy by ChrisMolloy

    Here's ARG0003848, an #overedge, #doublelobe.

    enter image description here

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk
    thread.

    The host appears to be SDSS J120204.64+081240.8, (in the centre of the above contour overlay) a #disk or #spiral galaxy, with a z_ph=0.146 ± 0.0356, and lobe size of ~2' or ~200 kpc, (as per the classification comments).

    enter image description here

    There is also an ALLWISE reference for this galaxy, ALLWISE J120204.59+081240.3, but there are also ALLWISE references for SDSS J120206.29+081226.1 and SDSS J120207.28+081218.1 which are ESE of SDSS J120204.64+081240.8 respectively.

    Here's a zoomed in image of SDSS J120204.64+081240.8. A possible SDRAGN candidate?

    enter image description here

    Posted

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

    A possible SDRAGN candidate?

    I certainly think so! 😃

    fracDeV_g, _r, and _i are 0.26, 0, and 0.03, respectively. That means it's quite likely a disk galaxy (or a disk-dominated one), not an elliptical. c, the inverse concentration ratio, for the g band is 0.435, and for the r band, 0.41. So, ditto. It's not quite 'out-of-round' enough to be unambiguously an Eos (or highly inclined disk); expAB_g, for example is 0.37 (the threshold is ~0.30).

    So, SDSS J120204.64+081240.8 is almost certainly a disk-dominated galaxy ... but is it the host?

    Posted