Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.k1043i&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #K1.043
Physics
Scientific paper
On the premise that small-impact-parameter scattering would produce a correlation in the orientation of sextupole and quadrupole moments in background galaxy images, we identified these "slightly curved" galaxies in the Hubble deep field and found them to be improbably clustered on the sky. We have now shown that a coincident clumping is evident in the B,V and Z color filters from the HDF north field and also in the overlapping GOODS field images. Noise studies of simulated galaxies show that moment orientations are indeed observable with acceptable accuracy for the size and intensity of the galaxy images selected. Studies of the properties of same-z groups of background galaxies indicate that the observed clumping is unlikely to arise from an intrinsic correlated curvature among the background galaxies themselves. The PSF as a source of clumping is also improbable. On the premise that the clumping is due to smale-scale dark-matter structure, we estimate component and group masses.
Irwin John
Shmakova Marina
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