Radio Galaxy Zoo Talk

1001G

  • 1001G by 1001G

    IS IT A VERY STRONG RADIO SOURCE AT THE CENTER OF THE CONTOURS.

    Posted

  • JeanTate by JeanTate in response to 1001G's comment.

    The source - direct or indirect - of all the radio emission is the nucleus of the elliptical galaxy, which is the big white/yellow IR blob to the left of center; here it is in SDSS:

    enter image description here

    It's a fairly extensive radio source (takes up lots of room in the image), but it's not really (physically) all that big. Why? Because it's very close to us, cosmologically speaking (the galaxy has a redshift of only 0.037).

    Even at its brightest, this is not a particularly strong radio source ... I count only six contours.

    What sort of radio source is it? If viewed from much further away, I think we'd say either hourglass or doublelobe (+host/core); however, because we can see it 'up close' it looks a lot more complicated. Maybe there are two sets of lobes, the brighter ones also have jets (or at least one jet), and the fainter ones are what's left of an older eruption?

    According to NED, this galaxy has 37 separate names! 😮 Its most common name may be CGCG 163-041; its SDSS name is SDSS J142440.52+263730.4.

    The nucleus is still active, as seen by the bright 'point radio source', and in the spectrum (the SDSS automated pipeline classifies the spectrum as "AGN"):

    enter image description here

    Happy (continued) hunting! 😃

    Posted