Because the apparent recessional speeds of galaxies and quasars at great distances are close to the speed of light, the relativistic Doppler shift formula (Eq. 37-31) must be used. The shift is reported as fractional red shift z = ((/(0.
(a) Show that, in terms of z, the recessional speed parameter ( = v/c is given by

(b) A quasar detected in 1987 has z = 4.43. Calculate its speed parameter.
(c) Find the distance to the quasar, assuming that Hubble's law is valid to these distances.

Transcribed Image Text:

z2 2z 2