Radio Galaxy Zoo Talk

Diffuse blob around NGC 240

  • JeanTate by JeanTate

    In the Interesting things from NVSS survey thread, Dolorous Edd writes:

    This is weird .. this a diffuse blob around NGC 0240 ( 00 45 01.19 +06 07 12.4 ) didn't see any radio study

    In this contour overlay image, with the sensitivity stretched well into the noise, one source does seem real; the rest, not:

    enter image description here

    The one apparently real source is SDSS J004501.82+060447.2, a z_ph ~0.1 highly-inclined spiral with a dustlane. If it's the source of the diffuse radio emission, it would be a quite amazing source, wouldn't it?

    enter image description here

    Should we add this to the Hourglass sources associated with spiral galaxies thread?

    <enter image description here>

    Perhaps a seasoned radio astronomer could comment on whether there could, in fact, be a diffuse radio source, ~2' in size, near NGC 240, that is essentially invisible in NVSS? My very limited understanding of radio astronomy is that this is something that is entirely possible. And not just because the diffuse source is faint ...

    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 is NGC 240 (J2000.0). "z_sp" is the SDSS spectroscopic redshift of the galaxy in the center.

    Posted