Two extremely red galaxies

Details Two extremely red galaxies Two extremely red galaxies

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107.1303h&link_type=abstract

The Astronomical Journal, vol. 107, no. 4, p. 1303-1306

Astronomy and Astrophysics

Astronomy

144

Absorption Spectra, Elliptical Galaxies, Quasars, Radio Astronomy, Radio Galaxies, Spectrophotometry, Spectroscopic Analysis, Astronomical Catalogs, Charge Coupled Devices, Sky Surveys (Astronomy), Spectral Energy Distribution

Scientific paper

We report the discovery of two galaxies with (I-K) approximately 6.5 lying near the line of sight to the z = 3.790 quasar PC 1643+4631 A. Based on the spectral energy distributions and angular extents of the objects we suggest that the most likely interpretation is that they are elliptical galaxies lying at z approximately 2.4. The existence of such evolved objects at this redshift would imply a current age of the universe substantially in excess of 1.0 x 1010 yr for q0 = 0.02, and 1.9 x 1010 yr for q0 = 0.5. It would also imply that at least some large luminous galaxies were already fully formed at z greater than 6.

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