Radio Galaxy Zoo Talk

ARG00013hq Lobe separation distance from a possible host

  • ChrisMolloy by ChrisMolloy

    What is an acceptable separation distance of a lobe from a possible host?

    Below is ARG00013hq. Centre lobe is ENE of SDSS J153330.52+410705.4 which could be the host but is the separation distance of the lobe from the galaxy viable for this galaxy to be the host?

    enter image description here

    BTW - still usng Aladin. Will switch to Python overlays soon.

    Posted

  • 42jkb by 42jkb scientist, admin in response to ChrisMolloy's comment.

    This is an interesting question. This will depend on the redshift of the galaxy. Radio lobes have been observed to extend to over 500 kpc on either side of the host galaxy. The redshift will tell you what distance that would be in arcsec.

    Posted

  • JeanTate by JeanTate

    FWIW, FIRST shows a just-below-threshold diffuse (N)W lobe (in the ARG image, move the slider to extreme left; there's a blue haze with an almost-white 'hotspot', where you'd expect any NW lobe to be), making this a possible #asymmetric #triple:

    enter image description here

    Posted

  • ChrisMolloy by ChrisMolloy in response to 42jkb's comment.

    Thanks.

    If the green galaxy SDSS J153330.52+410705.4 is the host, I get a distance of roughly 9.557”. So using Ned Wrights calculator and the setting of 70/0.3/0.7 I get the following: scale of 5.119 kpc/", with a z_ph=0.370, so separation of 48.9 kpc, or 9.55"(arcsec) or 0.159'(arcmin).

    And I agree with Jean, I think there is the possibility of this being an #asymmetric #triple, albeit faint, with the host being SDSS J153327.92+410721.0. Although SDSS J153330.52+410705.4 is listed in NED as a First source.

    Posted