Deep spectroscopy of the two mJy radio galaxies LBDS 53W069 and 53W091 has previously shown them to have old (>3 Gyr) stellar populations at z=1.5. Here we present the results of HST observations of these galaxies. 53W069 has an r^1/4 profile in both the F814W & F110W data with an effective radius of 0.30 arcsec (2.7 kpc). The restframe U-B colour gradient requires a stellar population of super-solar (3Z_sun) metallicity that formed on a very short timescale at high redshift (z>5). 53W091 has a regular r^1/4 profile in F110W with an effective radius of 0.32 arcsec (2.9 kpc). The F814W profile is more extended and is consistent with a blue exponential disk that contributes 20% of the flux within r_e. The restframe U-B colour gradient is sign...
The current evidence about the age of stellar populations in elliptical galaxies is reviewed. The ca...
Using the new evolutionary code Pégase.3, we undertook an evolutionary spectral synthesis of the opt...
We analyse the optical spectra of massive (log M*/M⊙ > 11.4) radio-loud galaxies at z ~ 0.2 and z ~ ...
We present the morphological analysis based on HST-NIC2 (0.075 arcsec/pixel) images in the F160W fil...
Two-dimensional surface photometry derived from Hubble Space Telescope imaging is presented for a sa...
Two-dimensional surface photometry has been performed on a magnitude-limited sample of 46 field gala...
We present deep HST ACS observations in g_(475)r_(625)i_(775)z_(850) toward the z = 4.1 radio galaxy...
I review the current status of an on-going investigation into the stellar and dynamical ages of the ...
The first epoch of Infrared Array Camera (IRAC) observations of the Great Observatories Origins Deep...
Investigations into several aspects of the evolution of the massive elliptical galaxies associated w...
We present the results of a comprehensive re-analysis of the images of a virtually complete sample o...
A systematic survey measuring the submillimetre continuum luminosity in radio galaxies between redsh...
Using deep Hubble Space Telescope Advanced Camera for Surveys imaging and Very Large Telescope FOcal...
Using the multiwavelength photometric and spectroscopic data covering the CDF-S obtained within the ...
We present observations of a very massive galaxy at z = 1.82 that show that its morphology, size, ve...
The current evidence about the age of stellar populations in elliptical galaxies is reviewed. The ca...
Using the new evolutionary code Pégase.3, we undertook an evolutionary spectral synthesis of the opt...
We analyse the optical spectra of massive (log M*/M⊙ > 11.4) radio-loud galaxies at z ~ 0.2 and z ~ ...
We present the morphological analysis based on HST-NIC2 (0.075 arcsec/pixel) images in the F160W fil...
Two-dimensional surface photometry derived from Hubble Space Telescope imaging is presented for a sa...
Two-dimensional surface photometry has been performed on a magnitude-limited sample of 46 field gala...
We present deep HST ACS observations in g_(475)r_(625)i_(775)z_(850) toward the z = 4.1 radio galaxy...
I review the current status of an on-going investigation into the stellar and dynamical ages of the ...
The first epoch of Infrared Array Camera (IRAC) observations of the Great Observatories Origins Deep...
Investigations into several aspects of the evolution of the massive elliptical galaxies associated w...
We present the results of a comprehensive re-analysis of the images of a virtually complete sample o...
A systematic survey measuring the submillimetre continuum luminosity in radio galaxies between redsh...
Using deep Hubble Space Telescope Advanced Camera for Surveys imaging and Very Large Telescope FOcal...
Using the multiwavelength photometric and spectroscopic data covering the CDF-S obtained within the ...
We present observations of a very massive galaxy at z = 1.82 that show that its morphology, size, ve...
The current evidence about the age of stellar populations in elliptical galaxies is reviewed. The ca...
Using the new evolutionary code Pégase.3, we undertook an evolutionary spectral synthesis of the opt...
We analyse the optical spectra of massive (log M*/M⊙ > 11.4) radio-loud galaxies at z ~ 0.2 and z ~ ...