The massive active galaxy SDSS J1132 contains a supermassive black hole at its core. Recent observations indicate that its nuclear activity has dramatically faded, suggesting its quasar phase has ended.
Suggest why the quasar emission has ceased.
SDSS J1132 is observed to have a red shift of z=0.0510z = 0.0510z=0.0510.
Determine the distance from the Earth to SDSS J1132. Give an appropriate unit for your answer. (Take the Hubble constant to be H0=68 km s−1 Mpc−1H_0 = 68\text{ km s}^{-1}\text{ Mpc}^{-1}H0=68 km s−1 Mpc−1 and the speed of light to be c=3.00×108 m s−1c = 3.00 \times 10^8\text{ m s}^{-1}c=3.00×108 m s−1.)
