A robust method for measuring the Hubble parameter

Hendry, M.A. , Rauzy, Z., Goodwin, S.P. and Gribbin, J. (2001) A robust method for measuring the Hubble parameter. Monthly Notices of the Royal Astronomical Society, 324(3), 717 -724. (doi: 10.1046/j.1365-8711.2001.04377.x)

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Publisher's URL: http://dx.doi.org/10.1046/j.1365-8711.2001.04377.x


We obtain a robust, non-parametric, estimate of the Hubble constant from the linear diameters and rotation velocities of galaxies in the recent KLUN sample, calibrated using Cepheid distances to Hubble Space Telescope Key Project galaxies. There are two key features that make our analysis considerably more robust than previous work. First, the method is independent of the spatial distribution of galaxies and is insensitive to Malmquist bias. It may, therefore, be applied to more distant samples than so-called 'plateau' methods making it much less vulnerable to the impact of peculiar motions in the Local Supercluster. Secondly, we include information on the galaxy rotation velocities in a fully non-parametric manner: unlike the conventional TullyFisher relation we reconstruct a robust estimate of the cumulative distribution function of galaxy diameter at given rotation velocity, without requiring the assumption of, for example, a linear TullyFisher relation with symmetric Gaussian residuals.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Hendry, Professor Martin
Authors: Hendry, M.A., Rauzy, Z., Goodwin, S.P., and Gribbin, J.
Subjects:Q Science > QB Astronomy
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Monthly Notices of the Royal Astronomical Society
Publisher:Wiley-Blackwell Publishing Ltd.
ISSN (Online):1365-2966

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