Radio Galaxy Zoo Talk

unusual feature for QSO?

  • WizardHowl by WizardHowl

    #wat with two unrelated point sources, or maybe one corejet. The wat has multiple possible matches for the source, complicated by the lack of a radio core.

    My query relates to the brighter compact source, with an IR match, with the apparent optical host a QSO with Z_sp=1.482 SDSS J100517.19+231431.7 which seems to have some absorption lines in its spectrum. I don't think these are from the quasar itself, rather from material in between it and us, but it's not something I remember seeing on a quasar spectrum previously (although I know it is something that has been observed in some quasars before I'm not sure how [un]common it is), so I was wondering if that made this an object worth highlighting. (Quasars are common, quasars with radio emission less common, quasars with radio emission and absorption lines even less common but maybe still plentiful?)


  • WizardHowl by WizardHowl

    Thought it might be worthwhile adding a couple of other quasars to this discussion, that have been mentioned by others as well as having potentially very unusual spectral features:

    SDSS J085956.53+380234.8 Z_sp=.303

    The spectrum seems to more closely resemble a classical star-forming disk galaxy with strong but narrow emission lines present and the optical source is not point-like, however there is also a very broad emission line and it seems to have been classified as a QSO. The radio emission is point-like. Could this be a face-on disk galaxy with a strong AGN?

    SDSS J103240.72+373826.7 Z_sp=1.219

    This was commented upon by Dolorous Edd, who has noted it also shows a signal in GALEX near UV. The spectrum here has a different shape with only a small number of weak lines that show no broadening. The radio emission is strong and point-like.

    Another one with both broad and narrow emission lines, perhaps these are more common than I had thought:

    SDSS J105443.02+150656.2 Z_sp=0.581

    This quasar seems point-like in SDSS despite a spectrum that looks like a normal QSO combined with a normal disk galaxy. Perhaps a quasar with a burst of star formation? The radio emission is point-like.