Abstract
We have discovered that the optical to near-infrared properties of Gigahertz Peaked Spectrum (GPS) galaxies are consistent with them having old stellar populations, with little or no contamination from their active nuclei. They seem to be a homogeneous class of object, in luminosity and scatter comparable to first ranked cluster galaxies. At z ∼ 1 the K band luminosities are about a magnitude fainter than expected for passively evolving ellipticals, just as in the case of radio-quiet giant ellipticals at similar redshifts. This may be caused by the dynamical evolution of the galaxies counteracting the change in mass-to-light ratio of the systems. We have selected a new sample of faint GPS sources from the Westerbork Northern Sky Survey, which yielded a large sample of potentially high redshift GPS galaxies. We believe that this is an ideal sample to study the evolution of giant ellipticals at z > 1.
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© 1998 Springer Science+Business Media Dordrecht
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Snellen, I., Schilizzi, R., Bremer, M., Miley, G., De Bruyn, G. (1998). Gigahertz Peaked Spectrum Sources as Cosmological Probes. In: Bremer, M.N., Jackson, N., Pérez-Fournon, I. (eds) Observational Cosmology. Astrophysics and Space Science Library, vol 226. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5238-9_42
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DOI: https://doi.org/10.1007/978-94-011-5238-9_42
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