Second-order contribution to the gravitational deflection of light

1980 ◽  
Vol 22 (12) ◽  
pp. 2950-2952 ◽  
Author(s):  
Ephraim Fischbach ◽  
Belvin S. Freeman
Keyword(s):  
Second Order ◽  
Order Contribution ◽  
Deflection Of Light ◽  
Gravitational Deflection Of Light ◽  
Gravitational Deflection

scholarly journals BRANS–DICKE THEORY: JORDAN VERSUS EINSTEIN FRAME

2007 ◽  
Vol 22 (05) ◽  
pp. 367-375 ◽  
Author(s):  
A. BHADRA ◽  
K. SARKAR ◽  
D. P. DATTA ◽  
K. K. NANDI
Keyword(s):  
General Relativity ◽  
Second Order ◽  
Einstein Frame ◽  
Jordan Frame ◽  
Scalar Tensor Theory ◽  
Order Accuracy ◽  
Deflection Of Light ◽  
Tensor Theory ◽  
Gravitational Deflection Of Light ◽  
Gravitational Deflection

It is well known that, in contrast to general relativity, there are two conformally related frames, the Jordan frame and the Einstein frame, in which the Brans–Dicke theory, a prototype of generic scalar–tensor theory, can be formulated. There is a long standing debate on the physical equivalence of the formulations in these two different frames. It is shown here that gravitational deflection of light to second order accuracy may observationally distinguish the two versions of the Brans–Dicke theory.

scholarly journals The Gravitational Deflection of Light in f(R)-Gravity

2014 ◽  
Vol 53 (6) ◽  
pp. 1947-1952 ◽  
Author(s):  
Long Huang ◽  
Feng He ◽  
Hai Huang ◽  
Min Yao
Keyword(s):  
Deflection Of Light ◽  
Gravitational Deflection Of Light ◽  
Gravitational Deflection

scholarly journals Relativistic effect of gravitational deflection of light in binary pulsars

1996 ◽  
Vol 160 ◽  
pp. 131
Author(s):  
Oleg V. Doroshenko ◽  
Sergei M. Kopeikin
Keyword(s):  
Gravitational Field ◽  
Strong Field ◽  
Alternative Theories Of Gravity ◽  
Estimation Of Parameters ◽  
Orbital Inclination ◽  
Binary Pulsars ◽  
Deflection Of Light ◽  
Shapiro Effect ◽  
Gravitational Deflection Of Light ◽  
Gravitational Deflection

Timing formula for data processing of observations of binary pulsars that accounts for the relativistic deflection of light in the gravitational field of the pulsar’s companion is presented, and the measurability of this effect along with its variance estimates is discussed. The deflection of the pulsar’s pulse trajectory in the gravitational field of its companion leads to variation in the pulsar’s rotational phase. This variation appears as a narrow sharp growth of the magnitude of the post-fit residuals in the vicinity of the moment of the superior conjunction of the pulsar with its companion. In contrast to the relativistic Shapiro effect, the amplitude of the effect of gravitational deflection of the pulsar radio beam has two peaks with opposite signs, which become sharper as the inclinationiof the pulsar’s orbit approaches to the right angle. The effect under consideration influences the estimation of parameters of the relativistic Shapiro effect in the binary pulsars with nearly edgewise orbits. Its inclusion in the fitting procedure provides a more careful measurement of the sine of the orbital inclinationi, as well as the masses of the pulsar and its companion. This permits an improved testing of alternative theories of gravity in the strong field regime. The effect of the gravitational deflection of light has been numerically investigated for binary pulsars with nearly edgewise orbits. It is shown that the effect is observed in general only when cosi is less than 0.003. This estimate becomes less restrictive as the pulsar’s spin axis approaches the line of sight.

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