Article

# Rotating Charged Black Hole Solution in Heterotic String Theory

• ##### Ashoke Sen
Physical Review Letters (Impact Factor: 7.73). 04/1992; DOI: 10.1103/PhysRevLett.69.1006
Source: arXiv

ABSTRACT We construct a solution of the classical equations of motion arising in the low energy effective field theory for heterotic string theory. This solution describes a black hole in four dimensions carrying mass $M$, charge $Q$ and angular momentum $J$. The extremal limit of the solution is discussed. Comment: 9 pages

0 Bookmarks
·
54 Views
• ##### Article: Hawking temperature and entropy of Kerr-Sen black hole as a series with dependence on Plank constant
[Hide abstract]
ABSTRACT: By assumption of a low-energy string theory in addition to the necessity of the semi-classic expansion on action, we study Hawking temperature and entropy of Kerr-Sen 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 semi-classic approximation affects the thermodynamics of the Kerr-Sen black hole, corrected terms classical action and the entropy.
Astrophysics and Space Science 11/2013; · 2.06 Impact Factor
• ##### Article: Corrected horizon of Kerr-Sen black hole as a series with terms involve powers of the inverse of the area
[Hide abstract]
ABSTRACT: By means of the semiclassical approximations for the action, the horizon of Kerr-Sen black hole is studied. The corrected entropy of the Kerr-Sen black hole in a low-energy string theory is calculated. By assumption of a flat Friedman-Robertson-Walker (F.R.W.) geometries, we study horizon and present the semi-classic approximation affects of the thermodynamics properties. We discuss some physical consequences of this result and the properties of the Kerr-Sen black hole.
Astrophysics and Space Science 11/2013; · 2.06 Impact Factor
• Source
##### Article: Massive neutral particles on heterotic string theory
[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 space-time in the Einstein frame, we perform a quantitative analysis of the time-like 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 space-time.
11/2013;