FERMIONS TUNNELING FROM BARDEEN–VAIDYA BLACK HOLE VIA GENERAL TORTOISE COORDINATE TRANSFORMATION

2009 ◽  
Vol 24 (22) ◽  
pp. 1775-1783 ◽  
Author(s):  
LIN KAI ◽  
YANG SHUZHENG
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Event Horizon ◽  
Coordinate Transformation ◽  
Hawking Temperature ◽  
Tunneling Rate ◽  
Fermions Tunneling ◽  
Vaidya Black Hole ◽  
Tortoise Coordinate ◽  
Tortoise Coordinate Transformation

In this paper, we research on the scalar field particles and 1/2 spin fermions tunneling from the event horizon of Bardeen–Vaidya black hole by semiclassical method and general tortoise coordinate transformation, and obtain the Hawking temperature and tunneling rate near the event horizon.

TORTOISE COORDINATE TRANSFORMATION ON APPARENT HORIZON OF A DYNAMICAL BLACK HOLE

2012 ◽  
Vol 12 ◽  
pp. 358-367 ◽  
Author(s):  
XIANMING LIU ◽  
ZHENG ZHAO ◽  
WENBIAO LIU
Keyword(s):  
Black Hole ◽  
Event Horizon ◽  
Hawking Radiation ◽  
Coordinate Transformation ◽  
Apparent Horizon ◽  
Schwarzschild Black Hole ◽  
First Law Of Thermodynamics ◽  
Vaidya Black Hole ◽  
Tortoise Coordinate ◽  
Tortoise Coordinate Transformation

Thinking of Hawking radiation calculation from a Schwarzschild black hole using Damour-Ruffini method, some key requirements of the tortoise coordinate transformation are pointed out. Extending these requirements to a dynamical black hole, a dynamical tortoise coordinate transformation is proposed. Under this new dynamical tortoise coordinate transformation, Hawking radiation from a Vaidya black hole can be got successfully using Damour-Ruffini method. Moreover, we also find that the radiation should be regarded as originating from the apparent horizon rather than the event horizon at least from the viewpoint of the first law of thermodynamics.

scholarly journals ABSORPTION CROSS SECTION OF A RN BLACK HOLE

2009 ◽  
Vol 18 (01) ◽  
pp. 1-11 ◽  
Author(s):  
R. SINI ◽  
V. C. KURIAKOSE
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Event Horizon ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Hawking Temperature ◽  
Absorption Cross ◽  
Charged Scalar ◽  
Matter Waves ◽  
Charged Scalar Field

The behavior of a charged scalar field in the RN black hole space–time is studied using the WKB approximation. In the present work, it is assumed that matter waves can be reflected from the event horizon. Using this effect, the Hawking temperature and the absorption cross section for an RN black hole placed in a charged scalar field are calculated. The absorption cross section σabs is found to be inversely proportional to the square of the Hawking temperature of the black hole.

Hawking radiation from a dynamical Kerr–Newman black hole

2011 ◽  
Vol 89 (6) ◽  
pp. 667-672 ◽  
Author(s):  
Han Ding ◽  
Xian-Ming Liu ◽  
Wen-Biao Liu
Keyword(s):  
Black Hole ◽  
Hawking Radiation ◽  
Coordinate Transformation ◽  
Apparent Horizon ◽  
Schwarzschild Black Hole ◽  
Static Black Hole ◽  
Newman Black Hole ◽  
Tortoise Coordinate ◽  
Tortoise Coordinate Transformation ◽  
Generalized Tortoise Coordinate Transformation

After Hawking radiation from a Schwarzschild black hole is calculated using the Damour–Ruffini method, the tortoise coordinate transformation in a static black hole is extended to a dynamical axisymmetric black hole, such as a dynamical Kerr–Newman black hole. Under the generalized tortoise coordinate transformation, Hawking radiation from a dynamical Kerr–Newman black hole is obtained successfully. Moreover, it also seems to occur on the apparent horizon instead of the event horizon.

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