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- David Koop, Emanuele Santos, +9 authors Cláudio T. Silva
- ICCS
- 2011

As publishers establish a greater online presence as well as infrastructure to support the distribution of more varied information, the idea of an executable paper that enables greater interaction has developed. An executable paper provides more information for computational experiments and results than the text, tables, and figures of standard papers.… (More)

- Joel E. Tohline, Emanuele Santos
- Computing in Science & Engineering
- 2010

Let's face it: The printed journal format that has served the scientific research community satisfactorily for more than 200 years doesn't serve the computational sciences community well at all. The community should, instead, communicate and archive the results of its research endeavors through a venue that lets students and colleagues fully examine… (More)

- Matthew Anderson, Eric W. Hirschmann, +5 authors Joel E. Tohline
- 2008

We model two mergers of orbiting binary neutron stars, the first forming a black hole and the second a differentially rotating neutron star. We extract gravitational waveforms in the wave zone. Comparisons to a post-Newtonian analysis allow us to compute the orbital kinematics, including trajectories and orbital eccentricities. We verify our code by… (More)

- Cláudio T. Silva, Joel E. Tohline
- Computing in Science and Engineering
- 2008

R ecord keeping has always been an essential component of science and engineering, but it has become even more so recently. As computers get faster, we perform increasingly complex computa-tions—and as storage gets cheaper, we accumulate larger volumes of data. The complete process, from data acquisition through analysis, is inherently exploratory: users… (More)

- Joel E. Tohline, Jinghya Ge, Wesley Even, Erik Anderson
- Computing in Science & Engineering
- 2009

A relatively simple, customized Python module that plugs smoothly into an otherwise standard workflow within VisTrails facilitates a quantitative analysis of complex fluid flows in simulations of merging binary stars.

- Matthew Anderson, Eric W Hirschmann, +5 authors Joel E Tohline
- Physical review letters
- 2008

We investigate the influence of magnetic fields upon the dynamics of, and resulting gravitational waves from, a binary neutron-star merger in full general relativity coupled to ideal magnetohydrodynamics. We consider two merger scenarios: one where the stars have aligned poloidal magnetic fields and one without. Both mergers result in a strongly… (More)

We show that an exact expression for the GreenÏs function in cylindrical coordinates is 1 o x [ x@ o \ 1 nJRR@ ; m/~= = eim(Õ~Õ {)Q m~1@2 (s), where and is the half-integer degree Legendre function of the s 4 [R2]R@ 2 ](z[z@)2]/(2RR@), Q m~1@2 second kind. This expression is signiÐcantly more compact and easier to evaluate numerically than the more familiar… (More)

- Joel E. Tohline
- Computing in Science & Engineering
- 2007

From the perspective of a computational scientist who models astrophysical fluid flows, the author describes the successes and frustrations he's had with the development and use of scientific visualization techniques. A biased view toward the future is also presented.

We describe computational tools that have been developed to simulate dynamical mass transfer in semi-detached, polytropic binaries that are initially executing synchronous rotation upon circular orbits. Initial equilibrium models are generated with a self-consistent field algorithm; models are then evolved in time with a parallel, explicit, Eulerian… (More)

We present numerical simulations of dynamically unstable mass transfer in a double white dwarf binary with initial mass ratio, q = 0.4. The binary components are approximated as polytropes of index n = 3/2 and the initially synchronously rotating, semi-detached equilibrium binary is evolved hydrody-namically with the gravitational potential being computed… (More)