Specifically, ~2 GHz radio emission from a galaxy at redshift 0.446 (SDSS J233645.19+054428.4) passing through and around a galaxy at ~0.18 (so its frequency 'there' was ~1.65 GHz; SDSS J233645.69+054500.6) and detected here on Earth at 1.4 GHz.
I vaguely remember that the key parameter is the electron density, which would be an average here, over many kpc, and the frequency; however, I do not remember the details (and haven't tried to look them up).
Source: the Radio Galaxy Zoo Talk thread, "ARG0003f4o: lobe appears split by foreground galaxy?"; check it out for images.
I vaguely remember that the key parameter is the electron density, which would be an average here, over many kpc, and the frequency; however, I do not remember the details (and haven't tried to look them up).
Source: the Radio Galaxy Zoo Talk thread, "ARG0003f4o: lobe appears split by foreground galaxy?"; check it out for images.
via International Skeptics Forum http://ift.tt/2vERoDy
Aucun commentaire:
Enregistrer un commentaire