ARG0003jp6 - how unusual is this?

• by JeanTate

  It's an obvious #doublelobe, and quite a strong one too (I count six contours for the SE lobe, and eight for the NW one), with a peak flux of ~16 (2^4) times the threshold. If that's ~1 mJ, then this is a pretty powerful source.

  As far as I can tell, it has no optical (SDSS) host, and only the vaguest hint of an IR (WISE) one.

  If the host's redshift is, in fact, >~0.6 (optical) or ~2 (IR), then it'd be very unusual, right? I mean, such a powerful (and relatively young) DL with such a wimpy host.

  Alternatively, if the host is at z >~3, this is highly unusual ... so powerful, and a DL to boot.

  Posted March 27, 2015 1:15 PM

• by JeanTate

  ARG0001z1v is similar, though more #hourglass than doublelobe.

  Posted March 28, 2015 7:52 PM

• by ivywong scientist, admin

  It is not very surprising that there are strong radio sources at high redshifts. This is why we compare the radio observations to IR rather than optical. However, if these sources are more distant than can be seen in the IR, astronomers also try to detect these galaxies in the sub-mm.

  Posted March 30, 2015 5:25 AM