Diffuse Light in A2670: Smoothly Distributed?

Details Diffuse Light in A2670: Smoothly Distributed? Diffuse Light in A2670: Smoothly Distributed?

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...423..566s&link_type=abstract

Astrophysical Journal v.423, p.566

Astronomy and Astrophysics

Astronomy

20

Cosmology: Diffuse Radiation, Galaxies: Intergalactic Medium, Galaxies: Elliptical And Lenticular, Cd, Galaxies: Clusters: Individual Alphanumeric: A2670

Scientific paper

We report R- and V-band observations of the rich cluster of galaxies A2670. A measurement of the circular component of the diffuse light or halo of the cD follows a smooth de Vaucouleurs profile out to 230/h kpc. Measurements of the fluctuation per pixel indicate that the diffuse light is likely to be composed of numerous low-luminosity objects. Autocorrelations of the residual images allow us to probe the small-scale fluctuations to a sensitivity of 0.05% of the diffuse light. A differential luminosity function of the central 160/h kpc suggests real differences in the luminosity function within the cluster center from a universal cluster luminosity function. We measure the V - R color of the cD and cluster galaxies and the color gradient across the halo. Also, we report results from a search for detecting evidence of the visible results of dynamical friction, that is, the wakes associated with galaxies passing through a diffuse medium.

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