Does anyone know how much of an effect gravatational redshift has on the redshift that we detect from quasars? As I`m sure most know blackholes sucking in matter are believed to be the energy source for quasars. Also quasars are the most remote detectable object in the universe and thus exhibit a large redshift because of their large distance and thus large velocity (via Hubble`s constant). However, I would think that not all of this redshift is from the Doppler effect and some would be from the gravatational redshift created by the core`s blackhole. Gravatational redshift occurs because light loses energy when trying to escape from a gravity field thus causing the wavelength to increase or to redshift. Anyways it would seem that if you don`t take this gravatational redshift into account then the quasar would appear further away than it is when using the Hubble`s law which relates redshift to distance.

Thanks,
John

• RE: Gravatational redshift - chuck - October 23, 2000 - 02:36 UTC