All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Classical and Quantum Gravity

Volume

16

Issue

12

Publication Date

1999

First Page

3965

Last Page

3972

DOI

10.1088/0264-9381/16/12/313

Arxiv Identifier

arXiv:gr-qc/9907019v1

Abstract

The null geodesic equations in the Alcubierre warp-drive spacetime are numerically integrated to determine the angular deflection and redshift of photons which propagate through the distortion of the `warp-drive' bubble to reach an observer at the origin of the warp effect. We find that for a starship with an effective warp speed exceeding the speed of light, stars in the forward hemisphere will appear closer to the direction of motion than they would to an observer at rest. This aberration is qualitatively similar to that caused by special relativity. Behind the starship, a conical region forms from within which no signal can reach the starship, an effective `horizon'. Conversely, there is also a horizon-like structure in a conical region in front of the starship, into which the starship cannot send a signal. These causal structures are somewhat analogous to the Mach cones associated with supersonic fluid flow.

Comments

Published by Institute of Physics in Classical and Quantum Gravity. Publisher version requires subscription and is available through this remote link.

Author post print is deposited in arXiv.org and is available through link above

http://arxiv.org/abs/gr-qc/9907019

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