Lense-Thirring Field and the Solar Limb Effect

TL;DR

This paper investigates the Solar Limb Effect, a variation in gravitational red-shift across the solar disc, using a Lense-Thirring gravitational field model instead of Schwarzschild, considering solar rotation and observer motion.

Contribution

It introduces a relativistic red-shift formula based on the Lense-Thirring field to interpret the Solar Limb Effect, incorporating solar rotation and observer motion effects.

Findings

Lense-Thirring field provides a different perspective than Schwarzschild for solar red-shift.

Comparison with previous models shows improved agreement with observations.

The model accounts for the Sun's rotation and observer motion in red-shift calculations.

Abstract

Solar-Limb Effect is an observational phenomena connected to the solar gravitational red-shift. It shows a variation of the magnitude of the gravitational red-shift from the center to the limb of the solar disc. In the present work an attempt, for interpreting this phenomena using a general relativistic red-shift formula, is given . This formula takes into account the effect of the the Sun's gravitational field, the effect of the solar rotation, the effect of inclination of the line of sight and the motion of the observer. In this study the gravitational field of the Sun is assumed to be given by Lense-Thirring field instead of the Schwarzschild one. The Earth is assumed to move along an elliptic orbit. Comparison with a previous relativistic study and with observation is given.