Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...190l..11p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 190, no. 1-2, Jan. 1988, p. L11-L14.
Astronomy and Astrophysics
Astrophysics
38
Astronomical Photometry, Galactic Clusters, Gravitational Lenses, Astronomical Maps, Isophotes, Magnitude, Red Shift
Scientific paper
During a photometric survey of rich clusters of galaxies, several deep, high resolution, g and r exposures were taken on Abell 2218 that confirm the probable existence in the core of peculiar structures, elongated and curved around the central cD galaxy and another giant galaxy. Photometric and geometric data on the cluster core are furnished to constrain the various possible models. One of these 'arcs' is very blue, but faint, fragmentry, and of questionable significance. The other ones, redder and smaller, are similar to background galaxies lensed by a cluster core, which may be more or less elongated and distorted depending on their position with respect to the lens caustic.
Mathez Guy
Ojero E.
Pello-Descayre R.
Sanahuja Blai
Soucail Genevieve
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