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Testing the running of the cosmological constant with Type Ia Supernovae at high z
Cristina Espana-Bonet, Pilar Ruiz-Lapuente, Ilya L. Shapiro +1
Within the Quantum Field Theory context the idea of a "cosmological constant" (CC) evolving with time looks quite natural as it just reflects the change of the vacuum energy with t…
Supernova 2002bo: inadequacy of the single parameter description
S. Benetti, P. Meikle, M. Stehle +15
We present optical/near-infrared photometry and spectra of the type Ia SN 2002bo spanning epochs from -13 days before maximum B-band light to +102 days after. The pre-maximum optic…
Tycho Brahe's supernova: light from centuries past
Pilar Ruiz-Lapuente
The light curve of SN 1572 is described in the terms used nowadays to characterize SNeIa. By assembling the records of the observations done in 1572--74 and evaluating their uncert…
Search for the companions of Galactic SNe Ia
P. Ruiz-Lapuente, F. Comeron, S. Smartt +5
The central regions of the remnants of Galactic SNe Ia have been examined for the presence of companion stars of the exploded supernovae. We present the results of this survey for…
Cosmology with Supernovae
P. Ruiz-Lapuente
This review gives an update of the cosmological use of SNe Ia and the progress made in testing their properties from the local universe to high-z. The cosmological road from high-z…
Variable Cosmological Constant as a Planck Scale Effect
Ilya L. Shapiro, Joan Sola, Cristina Espana-Bonet +1
We construct a semiclassical FLRW cosmological model assuming a running cosmological constant (CC). It turns out that the CC becomes variable at arbitrarily low energies due to the…