The Distribution of Matter Out To 4.5Mpc Via TRGB Distances

Details The Distribution of Matter Out To 4.5Mpc Via TRGB Distances The Distribution of Matter Out To 4.5Mpc Via TRGB Distances

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21530605j&link_type=abstract

American Astronomical Society, AAS Meeting #215, #306.05; Bulletin of the American Astronomical Society, Vol. 42, p.304

Astronomy and Astrophysics

Astronomy

Scientific paper

The manner in which galaxies in the Local Volume are distributed in space represents the most detailed example available of the result of the formation of structure. In particular, the galaxies can be taken as test particles whose motions betray the presence of both luminous and dark matter. We construct a self-consistent volume-limited sample of 150 galaxy distances out to 4.5Mpc using stars at the Tip of the Red Giant Branch (TRGB) as standard candles. These distances are derived from archival data taken with the WFPC2 and ACS instruments on HST. Combining the spatial configuration of galaxies with radial velocity information we use numerical action methods to characterize the distribution of matter within this volume.

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