409 citations
- Universidad Nacional Autónoma de MéxicoMX72 papers
- Bariloche Atomic CentreAR67 papers
- Comisión Nacional de Energía AtómicaAR65 papers
- Consejo Nacional de Investigaciones Científicas y TécnicasAR65 papers
- Instituto de Tecnologías en Detección y AstropartículasAR65 papers
- Balseiro InstituteAR64 papers
- Universidad Nacional de La PlataAR64 papers
- Benemérita Universidad Autónoma de PueblaMX62 papers
- Universidade Estadual de Campinas (UNICAMP)BR62 papers
- Institute of Astronomy and Space PhysicsAR59 papers
- Instituto Politécnico NacionalMX59 papers
- National Technological UniversityAR59 papers
6 papers · 1 filter
Axially Symmetric Post-Newtonian Stellar Systems
Camilo Akimushkin, Javier Ramos-Caro, Guillermo A. González
We introduce a method to obtain self-consistent, axially symmetric, thin disklike stellar models in the first post-Newtonian (1PN) approximation. The models obtained are fully anal…
Non-gaussianity from the trispectrum and vector field perturbations
Cesar A. Valenzuela-Toledo, Yeinzon Rodriguez
We use the δN formalism to study the trispectrum T_ζof the primordial curvature perturbation ζwhen the latter is generated by vector field perturbations, considering the tree-level…
Non-gaussianity at tree and one-loop levels from vector field perturbations
Cesar A. Valenzuela-Toledo, Yeinzon Rodriguez, David H. Lyth
We study the spectrum P_ζand bispectrum B_ζof the primordial curvature perturbation ζwhen the latter is generated by scalar and vector field perturbations. The tree-level and one-l…
A family of relativistic charged thin disks with an inner edge
Antonio C. Gutiérrez-Piñeres, Guillermo A. González, Viviana M. Viña-Cervantes
A new family of exact solutions of the Einstein-Maxwell equations for static axially symmetric spacetimes is presented. The metric functions of the solutions are explicitely comput…
Finite thin disc models of four galaxies in the Ursa Major cluster: NGC3877, NGC3917, NGC3949 and NGC4010
Guillermo A. González, Sandra M. Plata-Plata, Javier Ramos-Caro
Finite thin disc models of four galaxies in the Ursa Major cluster are presented. The models are obtained by means of the Hunter method and the particular solutions are choosen in…
Preheating and the non-gaussianity of the curvature perturbation
Kazunori Kohri, David H. Lyth, Cesar A. Valenzuela-Toledo
The perturbation of a light field might affect preheating and hence generate a contribution to the spectrum and non-gaussianity of the curvature perturbation ζ. The field might app…