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Analytic approximation to 5 dimensional black holes with one compact dimension
We study black hole solutions in R{sup 4}xS{sup 1} space, using an expansion to second order in the square of the ratio of the radius of the horizon, {mu}, and the circumference of the compact
Universality and the magnetic catalysis of chiral symmetry breaking
The hypothesis that the magnetic catalysis of chiral symmetry breaking is due to interactions of massless fermions in their lowest Landau level is examined in the context of chirally symmetric models
Systematics of constant roll inflation
We study constant roll inflation systematically. This is a regime, in which the slow roll approximation can be violated. It has long been thought that this approximation is necessary for agreement
Collapse of axion stars
A bstractAxion stars, gravitationally bound states of low-energy axion particles, have a maximum mass allowed by gravitational stability. Weakly bound states obtaining this maximum mass have
Boson stars from self-interacting dark matter
A bstractWe study the possibility that self-interacting bosonic dark matter forms star-like objects. We study both the case of attractive and repulsive self-interactions, and we focus particularly in
Expansion in Higher Harmonics of Boson Stars using a Generalized Ruffini-Bonazzola Approach, Part 1: Bound States
The method pioneered by Ruffini and Bonazzola (RB) to describe boson stars involves an expansion of the boson field which is linear in creation and annihilation operators. This expansion constitutes
Axion stars in the infrared limit
A bstractFollowing Ruffini and Bonazzola, we use a quantized boson field to describe condensates of axions forming compact objects. Without substantial modifications, the method can only be applied
Gravitationally bound Bose condensates with rotation
We develop a self-consistent formulation of a slowly rotating, self-gravitating and dilute Bose-Einstein condensate (BEC) in the Newtonian approximation, with a view to astrophysical applications in