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7 papers · 2 filters
R-modes of neutron stars with the superfluid core
Umin Lee, Shijun Yoshida
We investigate the modal properties of the -modes of rotating neutron stars with the core filled with neutron and proton superfluids, taking account of entrainment effects betwe…
Observational Constraints on Cardassian Expansion
S. Sen, A. A. Sen
In this work, we have studied the observational constraints on the Cardassian Model for the dark energy. We have compared the model with existing Supernova data. The dependence of…
Nonradial Oscillations of Neutron Stars with a Solid Crust -- Analysis in the Relativistic Cowling Approximation--
Shijun Yoshida, Umin Lee
Nonradial oscillations of relativistic neutron stars with a solid crust are computed in the relativistic Cowling approximation, in which all metric perturbations are ignored. For t…
Generalized Chaplygin gas and CMBR constraints
M. C. Bento, O. Bertolami, A. A. Sen
We study the dependence of the location of the Cosmic Microwave Background Radiation (CMBR) peaks on the parameters of the generalized Chaplygin gas model, whose equation of state…
Quantum instability of magnetized stellar objects
R. Gonzalez Felipe, H. J. Mosquera Cuesta, A. Perez Martinez +1
The equations of state for degenerate electron and neutron gases are studied in the presence of magnetic fields. After including quantum effects to study the structural properties…
The distant Type Ia supernova rate
R. Pain, S. Fabbro, M. Sullivan +26
We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which su…