Streaming motions of galaxy clusters within 12 000 km s-1 - II. New photometric data for the Fundamental Plane

Details Streaming motions of galaxy clusters within 12 000 km s-1 - II. New photometric data for the Fundamental Plane Streaming motions of galaxy clusters within 12 000 km s-1 - II. New photometric data for the Fundamental Plane

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.327..249s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 327, Issue 1, pp. 249-264.

Astronomy and Astrophysics

Astronomy

8

Galaxies: Clusters: General, Galaxies: Distances And Redshifts, Galaxies: Elliptical And Lenticular, Cd, Cosmology: Observations, Large-Scale Structure Of Universe

Scientific paper

We present new R-band photometric data for 447 galaxies, gathered for the `Streaming Motions of Abell Clusters' (SMAC) project. The data comprise 629 individual measurements of the Fundamental Plane (FP) parameters effective radius (Re) and surface brightness (<μ>e), derived from r1/4-law profile fitting. More than a third of the galaxies were observed more than once. The photometric precision is ~0.02mag as judged from comparisons of aperture photometry between repeat observations of galaxies. The combination Xfp=logRe-0.33<μ>e, which enters into the Fundamental Plane relation, has internal uncertainties of ~0.008, corresponding to <2 per cent in estimated distance. Taken individually, the (correlated) internal errors in Re and <μ>e are ~8 per cent and ~0.12mag respectively. Comparisons with literature data constrain the external random errors to <~5 per cent in distance (per observation), which is small in comparison to the ~20 per cent scatter in the FP. The data will form part of a merged catalogue of FP parameters, presented in a companion paper.

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