SIMBAD references

1999AJ....118.2065S - Astron. J., 118, 2065-2070 (1999/November-0)

Near-infrared observations of the extremely red object Cl 0939+4713B: an old galaxy at z∼1.58 ?

SOIFER B.T., MATTHEWS K., NEUGEBAUER G., ARMUS L., COHEN J.G., PERSSON S.E. and SMAIL I.

Abstract (from CDS):

Near-infrared imaging and spectroscopic observations of the extremely red object Cl 0939+4713B (R-K∼7 mag) have been obtained with the Near Infrared Camera on the Keck I Telescope of the W. M. Keck Observatory. The imaging shows a slightly elongated structure, while the spectroscopy shows a continuum break that allows us to determine a redshift of z=1.58+0.01–0.03 for this system. The fits of a range of models to the infrared spectrum suggest that it is predominantly an old (>109 yr) stellar system that suffers little extinction, while the measured R and I magnitudes suggest an age of ∼3x108 yr. The limit on the equivalent width of any emission line in the infrared spectrum suggests that Cl 0939+4713B is not an actively star-forming galaxy. This system, though similar in R-K color to the object HR 10 (also known as J1645+46), is much different in morphology and emission-line strengths, demonstrating the heterogeneity of extremely red extragalactic objects selected on the basis of large R-K values.

Abstract Copyright:

Journal keyword(s): Galaxies: Distances and Redshifts - Galaxies: Evolution

Nomenclature: [SMN99] Cl 0939+4713B N=1.

Status at CDS:  

CDS comments: Cl 0939+4713B = [SMN99] Cl 0939+4713B = [PMD93] 0939+4713B in SIMBAD

Simbad objects: 3

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