Model Interacting Boson-Fermion Stars
This report gives an outline of current-current type interaction between self-gravitating bosons and fermions.
astro-ph↗
arXiv subjects
Vanda Silveira
Publications and source records attributed to Vanda Silveira.
Slowly Rotating Boson Fermion Stars
Relativistic prescription is used to study the slow rotation of stars composed by self-gravitating bosons and fermions (fermions may be considered as neutrons). Previous results demand that purely boson stars are unable to display slow rotation, if one uses relativistic prescription with classical scalar fields. In contrast to this, the present work shows that a combined boson-neutron star in its ground-state can rotate. Their structure and stability are analysed under slow rotation approximations.
gr-qc↗
Boson Star Rotation: A Newtonian Approximation
Using the Newtonian approximation, we study rotating compact bosonic objects. The equations which describe stationary states with non-zero angular momentum are constructed and some numerical results are presented as examples. Limits on the applicability of the Newtonian approximation are discussed.
astro-ph↗
Topologica Defects and Corrections to the Nambu Action
The effective action of a (1+2)-dimensional defect is obtained as an expansion in powers of the thickness.Considering non-straight solutions as the zero order term, the corrections to the Nambu action are found to depend on the curvature scalar and on the gaussian curvature .
gr-qc↗