Browsing by Author "Zeilinger, W. W."

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    Age and metallicity gradients in fossil ellipticals
    (2013) Eigenthaler, P.; Zeilinger, W. W.
    Context. Fossil galaxy groups are speculated to be old and highly evolved systems of galaxies that formed early in the universe and had enough time to deplete their L* galaxies through successive mergers of member galaxies, building up one massive central elliptical, but retaining the group X-ray halo.