5 papers · 1 filter
Cosmology with GTC. A combined mm-optical galaxy cluster survey
J. M. Diego, E. Martinez-Gonzalez, J. L. Sanz +2
The CMB Planck satellite (ESA) will provide a catalogue of nearly 30000 galaxy clusters (Sunyaev-Zel'dovich effect) between redshift 0 and approx. 2-3 (depending on the cosmologica…
A joint fit to the cosmological Model and the T-M and L_x-T relations using cluster data
J. M. Diego, E. Martinez-Gonzalez, J. L. Sanz +3
In this work we show how well can the cosmological parameters be constrained using galaxy cluster data. We also show how in the process of fitting the model which attempts to descr…
Imaging around PC1643+4631A at the Lyman limit
I. Ferreras, N. Benitez, E. Martinez-Gonzalez
We present a list of candidates for high redshift late-type galaxies in the field around the z=3.79 quasar PC1643+4631A. Deep U,V and R imaging has been used to search for objects…
Statistical excess of foreground galaxies around high-z radiogalaxies
N. Benitez, E. Martinez-Gonzalez, J. M. Martin-Mirones
K-band imaging of a sample of 21 radiogalaxies with z \sim 1.5 reveals the existence of a statistical association of foreground galaxies with the positions of the radiosources. The…
The absorbers towards Q0836+113
N. Benitez, E. Martinez-Gonzalez, J. L. Sanz +2
We have performed RIJHK_S imaging of the field around the z=2.67 quasar Q0836+113, which presents several metal line and a damped Lyαabsorption systems in its spectrum. The images…