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pro vyhledávání: '"Lombardi, James C."'
Observed high multiplicity planetary systems are often tightly packed. Numerical studies indicate that such systems are susceptible to dynamical instabilities. Dynamical instabilities in close-in tightly packed systems, similar to those found in abun
Externí odkaz:
http://arxiv.org/abs/2312.07648
In Paper I, we followed the evolution of binary stars as they orbited near the supermassive black hole (SMBH) at the Galactic center, noting the cases in which the two stars would come close enough together to collide. In this paper we replace the po
Externí odkaz:
http://arxiv.org/abs/1008.5369
Autor:
Lombardi, James C., Thrall, Ashley P., Deneva, Julia S., Fleming, Scott W., Grabowski, Paul E.
Publikováno v:
Mon.Not.Roy.Astron.Soc.345:762,2003
In dense stellar clusters, binary-single and binary-binary encounters can ultimately lead to collisions involving two or more stars. A comprehensive survey of multi-star collisions would need to explore an enormous amount of parameter space, but here
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307061
Autor:
Lombardi, James C., Warren, Jessica Sawyer, Rasio, Frederic A., Sills, Alison, Warren, Aaron R.
Collisions of main sequence stars occur frequently in dense star clusters. In open and globular clusters, these collisions produce merger remnants that may be observed as blue stragglers. Detailed theoretical models of this process require lengthy hy
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107388
Autor:
Lombardi, James C., Rasio, Frederic A.
We review recent 3D hydrodynamic calculations of stellar collisions using the Smoothed Particle Hydrodynamics (SPH) method, and we discuss the implications of the results for the formation and evolution of blue stragglers in globular clusters. We als
Externí odkaz:
http://arxiv.org/abs/astro-ph/0101087
Akademický článek
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We have performed a series of systematic tests to evaluate the effects of spurious transport in three-dimensional smoothed particle hydrodynamics (SPH) calculations. Our tests investigate (i) particle diffusion, (ii) shock heating, (iii) numerical vi
Externí odkaz:
http://arxiv.org/abs/astro-ph/9807290
Autor:
Rasio, Frederic A., Lombardi, James C.
Publikováno v:
J. Comp. App. Math., 109 (1999) 213-230
Smoothed Particle Hydrodynamics is a multidimensional Lagrangian method of numerical hydrodynamics that has been used to tackle a wide variety of problems in astrophysics. Here we develop the basic equations of the SPH scheme, and we discuss some of
Externí odkaz:
http://arxiv.org/abs/astro-ph/9805089
Publikováno v:
Phys.Rev. D56 (1997) 3416-3438
Using an energy variational method, we calculate quasi-equilibrium configurations of binary neutron stars modeled as compressible triaxial ellipsoids obeying a polytropic equation of state. Our energy functional includes terms both for the internal h
Externí odkaz:
http://arxiv.org/abs/astro-ph/9705218
Autor:
Sills, Alison, Lombardi, James C., Bailyn, Charles D., Demarque, Pierre, Rasio, Frederic A., Shapiro, Stuart L.
We explore the evolution of collisionally merged stars in the blue straggler region of the HR diagram. The starting models for our stellar evolution calculations are the results of the smoothed particle hydrodynamics (SPH) simulations of parabolic co
Externí odkaz:
http://arxiv.org/abs/astro-ph/9705019