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Evidence against a redshift z > 6 for the galaxy STIS123627+621755

Dey, Arjun; Stanford, S. A.; Spinrad, Hyron +5 more

The identification of galaxies at extreme distances provides the most direct information about the earliest phases of galaxy formation. But at redshifts z > 5 even the most luminous galaxies appear faint; the interpretation of low signal-to-noise ratio data is difficult and misidentifications do occur. Here we report optical and near-infrared o…

Unusual spectral energy distribution of a galaxy previously reported to be at redshift 6.68

Chen, Hsiao-Wen; Lanzetta, Kenneth M.; Pascarelle, Sebastian +1 more

Observations of distant galaxies are important both for understanding how galaxies form and for probing the physical conditions of the Universe at early times. It is, however, very difficult to identify galaxies at redshifts <italic>z</italic> > 5, because they are so faint and have few spectral characteristics. We previously report…