Features of Motion Around Global Monopole in Asymptotically dS/AdS Spacetime

Details Features of Motion Around Global Monopole in Asymptotically dS/AdS Spacetime Features of Motion Around Global Monopole in Asymptotically dS/AdS Spacetime

2003-03-07

arxiv.org/abs/astro-ph/0303158v1

Class.Quant.Grav. 20 (2003) 1703-1714

Astronomy and Astrophysics

Astrophysics

15 pages, 4 PS figures, accepted for publication in Class. Quantum Grav

Scientific paper

In this paper, we study the motion of test particle and light around the Global Monopole in asymptotically dS/AdS spacetime. The motion of a test particle and light in the exterior region of the global monopole in dS/AdS spacetime has been investigated. Although the test particle's motion is quite different from the case in asymptotically flat spacetime, the behaviors of light(null geodesic) remain unchanged except a energy(frequency) shift. Through a phase-plane analysis, we prove analytically that the existence of a periodic solution to the equation of motion for a test particle will not be altered by the presence of cosmological constant and the deficit angle, whose presence only affects the position and type of the critical point on the phase plane. We also show that the apparent capture section of the global monopole in dS/AdS spacetime is quite different from that in flat spacetime.

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