Results of investigation of radio galaxies of the survey "Cold": photometry colour redshifts and the age of the stellar population
BVRI data for the majority of the objects of the RC catalogue with steep spectra and mR < 24m are presented. These data have been used to estimate colour redshifts and the age of stellar systems of host galaxies. By way of example of distant radio galaxies it is shown that this approach gives an accuracy of redshift estimates close to that for field galaxies (~20%). The age estimates are less confident, however, the lower age limit for not too distant (z < 1.5) objects is determined quite reliably. Several galaxies have been detected that have an age above that of the Universe at the given z in simple CDM model of the Universe. A possibility of using such objects to specify the part played by "dark energy" is discussed. This paradox disappears in a model with the Λ-term equal to 0.6 - 0.8.
Bulletin of the Special Astrophysics Observatory
- Pub Date:
- Radio Continuum: Galaxies;
- Surveys: Galaxies;
- Galaxies: Fundamental Parameters;
- 20 pages and 6 figures (total number of figures is about 450 (mostly unified in 2 last complex figures (No 5 and 6) can be requested at anonymous@ftp://sed.sao.ru/pub/bul52/, two of these complex figures are given as examples in this e-preprint), uses sao2.sty and psfig.sty. Bulletin of SAO, 2001, No 52, PP.5-133, in press