a redshift of 2 implies a recession velocity of ...?

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a redshift of 2 implies a recession velocity of ...?

2007-03-08 07:12:46 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space

3 answers

(1+z) = (1+v/c) / sqrt(1- v^2 / c^2)

A redshift of two means z = 2

2007-03-08 08:26:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋

if c is the speed of light then:

v/c = ((1 + z)^2 - 1) / ( (1+z)^2 + 1 ) =>
v/c = (9-1)/(9+1) = 8/10 = 0.8 =>

v = 0.8 * c = 0.8 * 2.9979 10^5 km/s ~ 240,000 km/s

2007-03-08 08:59:23 · answer #2 · answered by John Doe 2 · 0⤊ 0⤋

mass

2007-03-12 07:46:07 · answer #3 · answered by J 4 · 0⤊ 0⤋