193 citations · 369 across the 8 of their papers we have counts for
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Cosmological constraints on Chaplygin gas dark energy from galaxy clusters X-ray and supernova data
J. V. Cunha, J. S. Alcaniz, J. A. S. Lima
The recent observational evidences for the present accelerated stage of the Universe have stimulated renewed interest for alternative cosmologies. In general, such models contain a…
Constraining the dark energy with galaxy clusters X-ray data
J. A. S. Lima, J. V. Cunha, J. S. Alcaniz
The equation of state characterizing the dark energy component is constrained by combining Chandra observations of the X-ray luminosity of galaxy clusters with independent measurem…
Cosmological implications of APM 08279+5255, an old quasar at z = 3.91
J. S. Alcaniz, J. A. S. Lima, J. V. Cunha
The existence of old high-redshift objects provides an important tool for constraining the expanding age of the Universe and the formation epoch of the first objects. In a recent p…