Faint distorted structures in the core of A 370 - Are they gravitationally lensed galaxies at Z about 1?

Details Faint distorted structures in the core of A 370 - Are they gravitationally lensed galaxies at Z about 1? Faint distorted structures in the core of A 370 - Are they gravitationally lensed galaxies at Z about 1?

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...200l..17f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p. L17-L20.

Astronomy and Astrophysics

Astrophysics

74

Astronomical Photometry, Galactic Clusters, Galactic Nuclei, Galactic Structure, Gravitational Lenses, Red Shift, Arcs, Astronomical Photography, Charge Coupled Devices, Dark Matter, Galactic Radiation, High Resolution

Scientific paper

This letter presents the analysis of deep and high resolution CCD images of the field of the cluster of galaxies Abell 370 (z = 0.374). The giant arc near the center was recently identified as the image of a distant galaxy gravitationally lensed by the cluster core. No counterarc is found where expected, but several faint and elongated objects are detected in the field. By far bluer than all cluster members, these structures are probably gravitationally lensed, distorted and amplified background galaxies at redshift z about 1. This reinforces the hypothesis that both dark and visible matter are essentially concentrated in the core of clusters of galaxies and act as gravitational lenses. From this observation, it is predicted that many such very distant and early galaxies may be detected in the near future from deep photometry of the cores of centrally concentrated clusters at intermediate redshift (z about 0.5).

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