181 citations · 1.6k across the 42 of their papers we have counts for
12 papers · 1 filter
On the gravitational content of molecular clouds and their cores
Javier Ballesteros-Paredes, Gilberto C. Gómez, Bárbara Pichardo +1
(Abridged) The gravitational term for clouds and cores entering in the virial theorem is usually assumed to be equal to the gravitational energy, since the contribution to the grav…
Geometrical and Physical Properties of Circumbinary Discs in Eccentric Stellar Binaries
Barbara Pichardo, Linda S. Sparke, Luis A. Aguilar
In a previous work (Pichardo et al. 2005), we studied stable configurations for circumstellar discs in eccentric binary systems. We searched for "invariant loops": closed curves (a…
Six New Galactic Orbits of Globular Clusters in a Milky-Way-Like Galaxy
Christine Allen, Edmundo Moreno, Barbara Pichardo
Absolute proper motions for six new globular clusters have recently been determined. This motivated us to obtain the Galactic orbits of these six clusters both in an axisymmetric G…
The orbits of 48 globular clusters in a Milky-Way-Like Barred Galaxy
Christine Allen, Edmundo Moreno, Barbara Pichardo
The effect of a barred potential (such as the one of the Milky Way) on the galactic orbits of forty-eight globular clusters for which absolute proper motions are known is studied.…
Circumstellar and Circumbinary Disks in Eccentric Stellar Binaries
Barbara Pichardo, Linda S. Sparke, Luis A. Aguilar
We explore test particle orbits in the orbital plane of eccentric stellar binary systems, searching for ``invariant loops'': closed curves that change shape periodically as a funct…
On the Galactic Spiral Patterns: Stellar and Gaseous
Marco Martos, Miguel Yanez, Xavier Hernandez +2
The gas response to a proposed spiral stellar pattern for our Galaxy is presented here as calculated via 2D hydrodynamic calculations utilizing the ZEUS code in the disk plane. The…
A Plausible Galactic Spiral Pattern and its Rotation Speed
M. Martos, X. Hernandez, M. Yanez +2
We report calculations of the stellar and gaseous response to a Milky Way mass distribution model including a spiral pattern with a locus as traced by K-band observations, over imp…
Models for the Gravitational Field of the Galactic Bar. An Application to Stellar Orbits in the Galactic Plane and Orbits of Some Globular Clusters
Barbara Pichardo, Marco Martos, Edmundo Moreno
We built three models for the gravitational field of the Galactic bar. These models are an inhomogeneous ellipsoid, an inhomogeneous prolate spheroid, and a superposition of four i…
Nonlinear Effects in Models of the Galaxy: 1. Midplane Stellar Orbits in the Presence of 3D Spiral Arms
Barbara Pichardo, Marco Martos, Edmundo Moreno +1
With the aim of studying the nonlinear stellar and gaseous response to the gravitational potential of a galaxy such as the Milky Way, we have modeled 3D galactic spiral arms as a s…
Emissivity Statistics in Turbulent, Compressible MHD Flows and the Density-Velocity Correlation
Alex Lazarian, Dmitri Pogosyan, Enrique Vazquez-Semadeni +1
In this paper we test the results of a recent analytical study by Lazarian and Pogosyan, on the statistics of emissivity in velocity channel maps, in the case of realistic density…
On the Effects of Projection on Morphology
Bárbara Pichardo, Enrique Vázquez-Semadeni, Adriana Gazol +2
We study the effects of projection of three-dimensional (3D) data onto the plane of the sky by means of numerical simulations of turbulence in the interstellar medium including the…
Inflow and outflows in the interacting system NGC 2992/3
P. -A. Duc, E. Brinks, V. Springel +1
Whereas it is well known that gas may be driven into the core of merging disks, fueling a central AGN or a nuclear starburst, recent studies have shown that a significant fraction…