- Consider A Blob Of Radiating Plasma Moving Away From The Core Of A Quasar At A Velocity V At An Angle To The Line Of Sig 1 (72.09 KiB) Viewed 21 times
Consider a blob of radiating plasma moving away from the core of a quasar at a velocity v at an angle to the line of sig
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Consider a blob of radiating plasma moving away from the core of a quasar at a velocity v at an angle to the line of sig
Consider a blob of radiating plasma moving away from the core of a quasar at a velocity v at an angle to the line of sight to the Earth. (4a) Show that the observed velocity of the moving blob in the plane of the sky will be Bapp B sin 1-B cos where B = v/c. (12 marks] (4b) Find the angle to the line of sight for which the observed speed in the plane of the sky will be maximum for a given v and the corresponding maximum apparent speed. [10 marks] (4c) The observed proper motion of a component in the VLBI jet of the comparatively nearby quasar 3C273, at a redshift of z = 0.1583, is p = 0.8 mas/yr. What is the apparent speed of this component and its minimum true speed (express the Hubble constant in terms of h, and carry through factors of h)? Find the corresponding values for our current best estimate of h. [8 marks]
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