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A New Method for Estimating the Distance to Young Open Clusters
Martin A. Hendry, Mark A. O'Dell, Andrew Collier-Cameron
We present a new technique for estimating the distance to young open clusters. The method requires accurate measurement of the axial rotation period of late-type members of the clu…
New Distance Measurements to the Persei and Pleiades Clusters
Mark A. O'Dell, Martin A. Hendry, Andrew Collier Cameron
We apply the new distance measuring technique of Hendry, O'Dell and Collier- Cameron, 1993, to the Pleiades and Persei clusters. The method relies on knowledge of the periods,…
Optimal Galaxy Distance Estimators
Martin A. Hendry, John F. L. Simmons
The statistical properties of galaxy distance estimators are studied and a rigorous framework is developed for identifying and removing the effects of Malmquist bias due to obsevat…
What Do We Mean by Malmquist Bias?
Martin A. Hendry, John F. L. Simmons, Andrew M. Newsam
In this paper we review the two main approaches to the problem of Malmquist bias which have been adopted in the cosmology literature, and show how these two formulations of the pro…
Bias in Velocity Field Recoveries
Andrew Newsam, John F. L. Simmons, Martin Hendry
We investigate the effect of using different distance estimators on the recovery of the peculiar velocity field of galaxies using Potent. An inappropriate choice of distance estima…
Potent and Max-Flow Algorithms
John F. L. Simmons, Andrew Newsam, Martin Hendry
Although Potent purports to use only radial velocities in retrieving the potential velocity field of galaxies, the derivation of transverse components is implicit in the smoothing…