Strange modes can occur in radiative classical Cepheids and RR Lyrae models. These are vibrational modes that are trapped near the surface as a result of a ’potential barrier’ caused by the sharp hydrogen partial ionization region. Typically the modal number of the strange mode falls between the 7th and 12th overtone, depending on the astrophysical parameters of the equilibrium stellar models (...

We study the conversion of neutron matter into strange matter as a detonation wave. The detonation is assumed to originate from a central region in a spherically symmetric background of neutrons with a varying radial density distribution. We present self-similar solutions for the propagation of detonation in static and collapsing backgrounds of neutron matter. The solutions are obtained in the ...

We study the propagation of non-strange and strange meson modes in hadronic matter considering isospin and/or strangeness mixing induced by quantum fluctuations in the medium. Baryons are described using the Quark Meson Coupling model extended to include couplings with strange quarks. In particular we evaluate the dependence of the meson masses on the baryonic density, the strangeness fraction ...

The new data on both total cross sections and magnetic moments are simply described by beginning with the additive quark model in an SU(3) limit where all quarks behave like strange quarks and breaking both additivity and SU(3) simultaneously with an additional non-additive mechanism which affects only non-strange quark contributions. The suggestion that strange quarks behave more simply than n...

We propose a new state, strange color superconductivity, that appears in strange quark matter when total barion number density is fixed. In this state, heavy squarks, with a small Fermi surface, ’strangly’ pair with light u or d quarks that have a larger nominal Fermi surface, opening a gap there. There are gapless states in the intermediate region. Strange color superconductivity might be real...

We investigate the stability of strange quark matter and the properties of the corresponding strange stars, within a wide range of quark mass scaling. The calculation shows that the resulting maximum mass always lies between 1.5M⊙ and 1.8M⊙ for all the scalings chosen here. Strange star sequences with a linear scaling would support less gravitational mass, and a change (increase or decrease) of...

We show that the Coulomb barrier at the quark surface of a hot strange star may be a powerful source of ee pairs which are created in an extremely strong electric field of the barrier and flow away from the star. The luminosity in the outflowing pair plasma depends on the surface temperature TS and may be very high, up to ∼ 3× 10 51 ergs s at TS ∼ 10 11 K. The effect of pair creation by the Cou...

We investigate the relevance of the gravitational-wave driven r-mode instability for strange stars. We find that the unstable r-modes affect strange stars in a way that is quite distinct from the neutron star case. For accreting strange stars we show that the onset of r-mode instability does not lead to the thermo-gravitational runaway that is likely to occur in neutron stars. Instead, the stra...

We employ variational Monte Carlo methods to study the transition to strange matter in a simple one-dimensional string-flip model with two flavors and two colors of quarks. The dynamics of the system are described in terms of a many-body potential that confines quarks within hadrons, yet enables the hadrons to separate without generating unphysical long-range van der Waals forces. The model has...