Scalar Field Dark Matter: head-on interaction between two structures (2006)
Bernal, Argelia, Guzman, F. Siddhartha
In this manuscript we track the evolution of a system consisting of two self-gravitating virialized objects made of a scalar field in the newtonian limit. The Schr\"odinger-Poisson system contains a...
Scalar Field Dark Matter: non-spherical collapse and late time behavior (2006)
Bernal, Argelia, Guzman, F. Siddhartha
We show the evolution of non-spherically symmetric balls of a self-gravitating scalar field in the Newtonian regime or equivalently an ideal self-gravitating condensed Bose gas. In order to do so, we...
Gravitational cooling of self-gravitating Bose-Condensates (2006)
Guzman, F. Siddhartha, Urena-Lopez, L. Arturo
Equilibrium configurations for a self-gravitating scalar field with self-interaction are constructed. The corresponding Schr\"odinger-Poisson (SP) system is solved using finite differences assuming...
Evolution of 3D Boson Stars with Waveform Extraction (2006)
Balakrishna, Jayashree, Bondarescu, Ruxandra, Daues, Gregory, Guzman, F. Siddhartha, Seidel, Edward
Numerical results from a study of boson stars under nonspherical perturbations using a fully general relativistic 3D code are presented together with the analysis of emitted gravitational radiation....
Evolution of 3D Boson Stars with Waveform Extraction (2006)
Balakrishna, Jayashree, Bondarescu, Ruxandra, Daues, Gregory, Guzman, F. Siddhartha, Seidel, Edward
Numerical results from a study of boson stars under nonspherical perturbations using a fully general relativistic 3D code are presented together with the analysis of emitted gravitational radiation....
Accretion disk onto boson stars: a way to supplant black holes candidates (2005)
The emission spectrum from a simple accretion disk model around a compact object is compared for the cases of a black hole (BH) and a boson star (BS) playing the role of the central object. It was...
Dynamical evolution of quasi-circular binary black hole data (2005)
Alcubierre, Miguel, Brügmann, Bernd, Diener, Peter, Guzman, F. Siddhartha, Hawke, Ian, Hawley, Scott, ...
We study the fully nonlinear dynamical evolution of binary black hole data, whose orbital parameters are specified via the effective potential method for determining quasi-circular orbits. The cases...
Dynamical evolution of quasi-circular binary black hole data (2004)
Alcubierre, Miguel, Bruegmann, Bernd, Diener, Peter, Guzman, F. Siddhartha, Hawke, Ian, Hawley, Scott, ...
We study the fully nonlinear dynamical evolution of binary black hole data, whose orbital parameters are specified via the effective potential method for determining quasi-circular orbits. The cases...
Evolving spherical boson stars on a 3D cartesian grid (2004)
A code to evolve boson stars in 3D is presented as the starting point for the evolution of scalar field systems with arbitrary symmetries. It was possible to reproduce the known results related to...
Evolution of the Schr\"odinger--Newton system for a self--gravitating scalar field (2004)
Guzman, F. Siddhartha, Urena-Lopez, L. Arturo
Using numerical techniques, we study the collapse of a scalar field configuration in the Newtonian limit of the spherically symmetric Einstein--Klein--Gordon (EKG) system, which results in the so...
Toward standard testbeds for numerical relativity (2004)
Alcubierre,Miguel, Allen,Gabrielle, Bona,Carles, Fiske,David, Goodale,Tom, Guzman,F. Siddhartha, ...
In recent years, many different numerical evolution schemes for Einstein's equations have been proposed to address stability and accuracy problems that have plagued the numerical relativity community...
Evolution of the Schrödinger--Newton system for a self--gravitating scalar field (2004)
Guzman,F. Siddhartha, Urena-Lopez,L. Arturo
Using numerical techniques, we study the collapse of a scalar field configuration in the Newtonian limit of the spherically symmetric Einstein--Klein--Gordon (EKG) system, which results in the so...
Toward standard testbeds for numerical relativity (2004)
Alcubierre, Miguel, Allen, Gabrielle, Bona, Carles, Fiske, David R., Goodale, Tom, Guzman, F. Siddhartha, ...
In recent years, many different numerical evolution schemes for Einstein's equations have been proposed to address stability and accuracy problems that have plagued the numerical relativity community...
Evolution of the Schrödinger--Newton system for a self--gravitating scalar field (2004)
Guzman, F. Siddhartha, Urena-Lopez, L. Arturo
Using numerical techniques, we study the collapse of a scalar field configuration in the Newtonian limit of the spherically symmetric Einstein--Klein--Gordon (EKG) system, which results in the so...
Evolving spherical boson stars on a 3D cartesian grid (2004)
A code to evolve boson stars in 3D is presented as the starting point for the evolution of scalar field systems with arbitrary symmetries. It was possible to reproduce the known results related to...
Newtonian Collapse of Scalar Field Dark Matter (2003)
Guzman,F. Siddhartha, Urena-Lopez,L. Arturo
In this letter, we develop a Newtonian approach to the collapse of galaxy fluctuations of scalar field dark matter under initial conditions inferred from simple assumptions. The full relativistic...
Numerical studies of Phi2-Oscillatons (2003)
Alcubierre,Miguel, Becerril,Ricardo, Guzman,F. Siddhartha, Matos,Tonatiuh, Nunez,Dario, Urena-Lopez,L. Arturo
Newtonian Collapse of Scalar Field Dark Matter (2003)
Guzman, F. Siddhartha, Urena-Lopez, L. Arturo
In this letter, we develop a Newtonian approach to the collapse of galaxy fluctuations of scalar field dark matter under initial conditions inferred from simple assumptions. The full relativistic...
Numerical studies of Phi^2-Oscillatons (2003)
Alcubierre, Miguel, Becerril, Ricardo, Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Urena-Lopez, L. Arturo
We present an exhaustive analysis of the numerical evolution of the Einstein-Klein-Gordon equations for the case of a real scalar field endowed with a quadratic self-interaction potential. The...
Numerical studies of Phi2-Oscillatons (2003)
Alcubierre, Miguel, Becerril, Ricardo, Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Urena-Lopez, L. Arturo
Newtonian Collapse of Scalar Field Dark Matter (2003)
Guzman, F. Siddhartha, Urena-Lopez, L. Arturo
In this letter, we develop a Newtonian approach to the collapse of galaxy fluctuations of scalar field dark matter under initial conditions inferred from simple assumptions. The full relativistic...
Galacitic Collapse of Scalar Field Dark Matter (2002)
Alcubierre,Miguel, Guzman,F. Siddhartha, Matos,Tonatiuh, Nunez,Dario, Urena-Lopez,L. Arturo, Wiederhold,Petra
We present a scenario for galaxy formation based on the hypothesis of scalar field dark matter. We interpret galaxy formation through the collapse of a scalar field fluctuation. We find that a cosh...
Scalar Field Dark Matter and Galaxy Formation (2002)
Alcubierre, Miguel, Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Urena-Lopez, L. Arturo, Wiederhold, Petra
We present a general description of the scalar field dark matter (SFDM) hypothesis in the cosmological context. The scenario of structure formation under such a hypothesis is based on Jeans...
Scalar Field Dark Matter and Galaxy Formation (2002)
Alcubierre, Miguel, Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Urena-Lopez, L. Arturo, Wiederhold, Petra
We present a general description of the scalar field dark matter (SFDM) hypothesis in the cosmological context. The scenario of structure formation under such a hypothesis is based on Jeans...
Galacitic Collapse of Scalar Field Dark Matter (2002)
Alcubierre, Miguel, Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Urena-Lopez, L. Arturo, Wiederhold, Petra
We present a scenario for galaxy formation based on the hypothesis of scalar field dark matter. We interpret galaxy formation through the collapse of a scalar field fluctuation. We find that a cosh...
Galactic Collapse of Scalar Field Dark Matter (2001)
Alcubierre, Miguel, Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Urena-Lopez, L. Arturo, Wiederhold, Petra
We present a scenario for galaxy formation based on the hypothesis of scalar field dark matter. We interpret galaxy formation through the collapse of a scalar field fluctuation. We find that a cosh...
Matos, Tonatiuh, Nunez, Dario, Guzman, F. Siddhartha, Ramirez, Erandy
In an arbitrary axisymmetric stationary spacetime, we determine the expression for the tangential velocity of test objects following a circular stable geodesic motion in the equatorial plane, as...
Quintessence-like Dark Matter in Spiral Galaxies (2000)
Guzman, F. Siddhartha, Matos, Tonatiuh, Nunez, Dario, Ramirez, Erandy
Through the geodesic analysis of a static and axially symmetric space time, we present conditions on the state equation of an isotropic perfect fluid $p=\omega d$, when it is considered as dark...
Scalar Fields as Dark Matter in Spiral Galaxies (1998)
Guzman, F. Siddhartha, Matos, Tonatiuh
We present a model for the dark matter in spiral galaxies, which is a result of a static and axial symmetric exact solution of the Einstein-Dilaton theory. We suposse that dark matter is a scalar...
Scalar Field Dark Matter and Galaxy Formation
Alcubierre,Miguel, Guzman,F. Siddhartha, Matos,Tonatiuh, Nunez,Dario, Urena-Lopez,L. Arturo, Wiederhold,Petra
We present a general description of the scalar field dark matter (SFDM) hypothesis in the cosmological context. The scenario of structure formation under such a hypothesis is based on Jeans...