Authors: Fernando Loup
Warp Drives are solutions of the Einstein Field Equations that allows superluminal travel within the framework of General Relativity.There are at the present moment two known solutions: The Alcubierre warp drive discovered in $1994$ and the Natario warp drive discovered in $2001$.The warp drive seems to be very attractive because allows interstellar space travel at arbitrarily large speeds avoiding the time dilatation and mass increase paradoxes of Special Relativity. However it suffers from a very serious drawback: \newline In order to travel significant interstellar distances in reasonable amounts of time a ship would need to attain at least $200$ times the speed of light in order to visit a star like Gliese 581 at $20$ light-years with potential habitable exoplanets. \newline Some years ago Gonzalez-Diaz discovered that a warp drive at luminal speed develops an Horizon similar to the Schwarzschild Event Horizon that appears in the $\infty$ and at superluminal speeds this Horizon approaches the position of the spaceship.This means to say that as fast the ship goes by then as near to the ship the Horizon is formed.Plus as fast the ship goes by as hotter the Horizon becomes placing any ship and its astronauts in a dangerous thermal bath. \newline Gonzalez-Diaz applied its conclusions to the Alcubierre warp drive. \newline In this work we apply the analysis of Gonzalez-Diaz to the Natario warp drive and we arrive at an interesting result:When at luminal speed the Horizon is formed not in the $\infty$ but in the end of the Natario warped region and as fast the ship goes by superluminally this Horizon do not approaches the ship remaining inside the Natario warped region and keeping a constant temperature.This makes the Natario warp drive a better candidate for interstellar space travel when compared to its Alcubierre counterpart.
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[v1] 2013-02-24 11:09:29
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