Radio Galaxy Zoo Talk

Crossing Bands in the Radio

  • Cosmoslackist by Cosmoslackist

    I was made curious by the discreet criss-crossed bands in blue that are revealed when the slide is moved all the way over to the radio end. Is this some sort of instrument artifact?


  • JeanTate by JeanTate in response to Cosmoslackist's comment.

    Welcome to RGZ, Cosmoslackist! 😃

    Yes, those are instrument artifacts. They are a consequence of the fact that these 'radio images' are produced by a technique called interferometry, and the 'triangular mesh' shape of this 'noise' is a result of the Y-shaped layout of the radio dishes which make up the interferometer, the Very Large Array (VLA).

    Hope this helps; happy hunting! 😄