119 citations · 741 across the 31 of their papers we have counts for
5 papers · 1 filter
Can Dark Matter Decay in Dark Energy?
S. H. Pereira, J. F. Jesus
We analyze the interaction between Dark Energy and Dark Matter from a thermodynamical perspective. By assuming they have different temperatures, we study the possibility of occurri…
Simplified Chaplygin Gas: Deriving From Ages of Old High Redshift Objects and Baryon Acoustic Oscillations
R. C. Santos, J. F. Jesus
The discovery that the expansion of the Universe is accelerating is the most challenging problem of modern cosmology. In the context of general relativity, there are many dark ener…
New coupled quintessence cosmology
J. F. Jesus, R. C. Santos, J. S. Alcaniz +1
A component of dark energy has been recently proposed to explain the current acceleration of the Universe. Unless some unknown symmetry in Nature prevents or suppresses it, such a…
Can Old Galaxies at High Redshifts and Baryon Acoustic Oscillations Constrain H_0?
J. A. S. Lima, J. F. Jesus, J. V. Cunha
A new age-redshift test is proposed in order to constrain with basis on the existence of old high redshift galaxies (OHRG). As should be expected, the estimates of base…
Constraints from the Old Quasar APM 08279+5255 on Two Classes of t-Cosmologies
J. F. Jesus
The viability of two different classes of CDM cosmologies is tested by using the APM 08279+5255, an old quasar at redshift . In the first class of models, the cosmo…