121 Galaxy velocity study. Astronomical Journal (July 1995)

did a study of galaxy velocities . A histogram of the velocities of 103 galaxies located in a particular cluster named A2142 is reproduced below. Comment on whether or not the galaxy velocities are approximately normally distributed.

Transcribed Image Text:

Number of galaxies 0 15 A2142 Velocity Distribution 10 20 25 30 Observed velocity (/1000 km/sec) Oegerle, W. R., Hill, J. M., and Fitchett, M. J. "Observations of high dispersion clusters of galaxies: Constraints on cold dark matter." The Astronomical Journal, Vol. 110, No. 1, July 1995, p. 37 (Figure 1). Reproduced by permission of the AAS.