192 citations · 4k across the 104 of their papers we have counts for
11 papers · 1 filter
An Accelerating Cosmology Without Dark Energy
G. Steigman, R. C. Santos, J. A. S. Lima
The negative pressure accompanying gravitationally-induced particle creation can lead to a cold dark matter (CDM) dominated, accelerating Universe (Lima et al. 1996) without requir…
Phantom Accretion by Black Holes and the Generalized Second Law of Thermodynamics
J. A. S. Lima, S. H. Pereira, J. E. Horvath +1
The accretion of a phantom fluid with non-zero chemical potential by black holes is discussed with basis on the Generalized Second Law of thermodynamics. For phantom fluids with po…
Accelerating Cold Dark Matter Cosmology ()
J. A. S. Lima, F. E. Silva, R. C. Santos
A new kind of accelerating flat model with no dark energy that is fully dominated by cold dark matter (CDM) is investigated. The number of CDM particles is not conserved and the pr…
Constraining the Nonextensive Mass Function of Halos from BAO, CMB and X-ray data
L. Marassi, J. V. Cunha, J. A. S. Lima
Clusters of galaxies are the most impressive gravitationally-bound systems in the Universe and its abundance (the cluster mass function) is one important statistics to probe the ma…
Transition Redshift: New Kinematic Constraints from Supernovae
J. V. Cunha, J. A. S. Lima
The transition redshift (deceleration/acceleration) is discussed by expanding the deceleration parameter to first order around its present value. A detailed study is carried out by…
New constraints on H_0 and Omega_M from SZE/X-RAY data and Baryon Acoustic Oscillations
R. F. L. Holanda, J. V. Cunha, J. A. S. Lima
The Hubble constant, , sets the scale of the size and age of the Universe and its determination from independent methods is still worthwhile to be investigated. In this articl…