TULLY - FISHER RELATION PROOFING

Abstract

Tully – Fisher relation is a tool to study mass – luminosity relation for all galaxiesand other properties , the spiral galaxies was studied by this relation can use as standard candle tomeasure the distance for far and fast objects that turn aside from Hubble line. But somebody makedoupt about this relation for far than 200Mph and high velocities because the hardly widening of the21 cm line from HI atom , so we use the LEDA web site , that having more than 3 million objectswith its data, to prove the correct of this relation even for the more distance by finding the littlestandard devation , slope and other veraibles that deal with mass and luminosity