cicyt UNIZAR

Classical Physics

New submissions

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New submissions for Fri, 16 Mar 18

[1]  arXiv:1803.05444 [pdf, other]
Title: When do star clusters become multiple star systems? II. Toward a half-life formalism with four bodies
Comments: 17 pages, 18 figures, 2 tables; accepted for publication in MNRAS
Subjects: Solar and Stellar Astrophysics (astro-ph.SR); Classical Physics (physics.class-ph)

We present a half-life formalism for describing the disruption of gravitationally-bound few-body systems, with a focus on binary-binary scattering. For negative total encounter energies, the four-body problem has three possible decay products in the point particle limit. For each decay product and a given set of initial conditions, we obtain directly from numerical scattering simulations the half-life for the distribution of disruption times. As in radioactive decay, the half-lives should provide a direct prediction for the relative fractions of each decay product. We test this prediction with simulated data and find good agreement with our hypothesis. We briefly discuss applications of this feature of the gravitational four-body problem to populations of black holes in globular clusters. This paper, the second in the series, builds on extending the remarkable similarity between gravitational chaos at the macroscopic scale and radioactive decay at the microscopic scale to larger-N systems.

Replacements for Fri, 16 Mar 18

[2]  arXiv:1702.05667 (replaced) [pdf]
Title: Orbital Angular Momentum Antennas: Understanding Actual Possibilities Through the Aperture Antennas Theory
Comments: 11 pages, 4 figures
Journal-ref: IEEE Antennas and Propagation Magazine 2018
Subjects: Classical Physics (physics.class-ph)
[3]  arXiv:1708.06330 (replaced) [pdf, ps, other]
Title: Wavevector-dependent optical properties from wavevector-independent conductivity tensor
Comments: minor corrections; added references
Subjects: Optics (physics.optics); Classical Physics (physics.class-ph)
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