Article
Rotating Charged Black Hole Solution in Heterotic String Theory
Physical Review Letters (Impact Factor: 7.73). 04/1992; DOI: 10.1103/PhysRevLett.69.1006
Source: arXiv

Article: Hawking temperature and entropy of KerrSen black hole as a series with dependence on Plank constant
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ABSTRACT: By assumption of a lowenergy string theory in addition to the necessity of the semiclassic expansion on action, we study Hawking temperature and entropy of KerrSen black hole. These subjects, recently have introduced in the literature and consist of the new terms of temperature and entropy as the expansion form with powers of ħ. Comparing the results with the high energy black hole demonstrates how the semiclassic approximation affects the thermodynamics of the KerrSen black hole, corrected terms classical action and the entropy.Astrophysics and Space Science 11/2013; · 2.06 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: By means of the semiclassical approximations for the action, the horizon of KerrSen black hole is studied. The corrected entropy of the KerrSen black hole in a lowenergy string theory is calculated. By assumption of a flat FriedmanRobertsonWalker (F.R.W.) geometries, we study horizon and present the semiclassic approximation affects of the thermodynamics properties. We discuss some physical consequences of this result and the properties of the KerrSen black hole.Astrophysics and Space Science 11/2013; · 2.06 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: The motion of massive particles in the background of a charged black hole in heterotic string theory, which is characterized by a parameter $\alpha$, is studied in detail across this paper. Since it is possible to write this spacetime in the Einstein frame, we perform a quantitative analysis of the timelike geodesics by means of the standard Lagrange procedure. Thus, we obtain and solve a set of differential equations and then we describe the orbits in terms of elliptic $\wp$Weierstra{\ss} function. Also, by making an elementary derivation developed by Cornbleet (Am. J. Phys. \textbf{61} 7, (1993) 650  651) we obtain the correction to the angle of advance of perihelion to first order in $\alpha$, and thus, by comparing with Mercury's data we give an estimation for the value of this parameter, which yields to an {\it heterotic solar charge} $Q_{\odot}\simeq 0.728\,[\textrm{Km}]= 0.493\, M_{\odot}$. Therefore, in addition with the study on null geodesics performed by Fernando (Phys. Rev. D {\bf 85}, (2012) 024033), this work complete the geodesic structure for this class of spacetime.11/2013;
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