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An X-Ray Detected Group of Quiescent Early-Type Galaxies at z = 1.6 in the Chandra Deep Field South

Brandt, William N.; Mulchaey, John S.; Ueda, Yoshihiro +6 more

We report the discovery of an X-ray group of galaxies located at a high redshift of $ z$ $ =$ 1.61 in the Chandra Deep Field South. Based on 4 Ms Chandra data, the group is first identified…